I did this to my s124 wagon last summer after watching your video. I live in Las Vegas where ther temp get up to 115°f in the summer. I can drive ny car all day with the AC on and it barely gets over 100° C on my gauge. Well worth the price to do this. Thank you so much
@@paman_pekos8975 saya pemakai 300GE. Mesin mercedes m103 tidak apa² jika temperature mencapai 100c. Itu normal, apalagi macet macetan dijakarta. Saya merawat mobil ini sendiri sejak lama, bahkan menurut saya saran montir mercedes di indonesia banyak yang menyesatkan. untuk sistem pendingin, saya tetap pakai thermostat 87 dan visco fan yg normal (tidak dipaten) Mesin mobil saya lebih responsif dan bertenaga jika temperature kerja di 90c, dan 100-105c ketika macet macetan. Karena operating temperatur m103 adalah 80c sampai 110c. Lebih dari itu, mesin baru bisa dibilang overheat. tentunya jika mesin mobil dipakai di temperature yg lebih tinggi, bensin akan lebih irit dibanding temperature normal. INGAT, KE-Jetronic bekerja sesuai temperature mesin. Jadi temperature kerja mesin m103 sangat penting untuk diperhatikan agar performa mesin bisa maksimal
I have a W202 C280, also in Las Vegas and I'm thinking about doing the same. Stock setup was good in New York but the needle gets a little too close to 100 during the summers.
@@betadimas8384om, dgn suhu yg sampe 100 coolant cpt habis ga ? boxer saya skrg bisa sampe 100 jg, tp coolant cpt meluap keluar dari selang kecil di tabung, apa itu normal ?
In Middle East the weather is boiling in Summer temperature reach 50c We modified the system by replace thermostat with 65 or 72 degree Celsius , and beside 2pins coolant temp sensor addi1 pin 85/80 sensor. The car run at 85 , aux fan run at 85 and off at 80.
Awesome video! As someone that lives in subtropical Australia and has an M104 powered W140, these are a must. I actually used a high flow version of a thermostat for a W123 300D, apparently the diesel ones work really well to keep the temps down as they run much hotter. The resistor mod is a cheap, easy hack for those in high traffic areas!
Giving the transmission a dedicated oil cooler will drop coolant temps during long hill climbs with low revs too. The oil gets heated up really good while being slushed around in the torque converte since there is no lock up clutch. This heat then gets dumped into the cooling system.
Just changed my fan clutch from NRF, still after watching this, may consider getting a c36 clutch after this one dies, but guess will try to get it now as they are really rare, changed my old radiator to the new one from Nissens, and the thermostat from Febi Bilstein as well, all done last summer. Gotta say it improved a lot to my weekend drives during summer. Will stay updated on how to maintain my 4 wheeled beauty thanks to you man. Best regards !
its all good but nly fan clutch that does good job is from sachs like in this video , nrf break down fast or its already broken when its new (constantly operating)
I removed the fan on my 1987 300d and added a pair of mishimoto 12in fans and davies craig digital fan controller. Now my car never gets over 85c with ac on In 95 deg days. And no more power loss from the fan. Made a huge difference in the way it drives.
I'm going this route but because the 300E i6 is, well, an inline 6, the effective space between the radiator and the engine is only 8.5 cm (3.33") I'm having so much trouble finding a slim enough fan to fit. Here in Saudi Arabia it gets to ~48C (could exceed 120F in a good day). Would you kindly link me, or just give the model no., to the exact same fans you installed? If your radiator is as wide and high as mine, I guess it's safe to use 2 fans, but I need to check the depth first. Much obliged.
@SG-cm7zq I only have 3 inch clearance and they fit in mine. Just positioned then for clearance. My car on 95 deg day runs right on the 80c mark with ac on.
definitely doing the resistor trick on my E420! Just picked it up and don't like that it waits till 107... Love your cars btw, looking for all kinds of tips and tricks for the W124 platform as this is my first, already loving it!
Thanks! The resistor worked great on the E500 in the video as well. I’m looking into if there is a cooler thermostat and fan clutch for the m119. Super cool manual swapped C55 that you did! One of my favorite m113 cars.
I owned w124 E320 sedan 10 years ago . Everything as came from factory . Fan switch single pole kick if .A.C on or if reached 100C .. The most important thing that reduce coolant temperature is refrigerant must be filled with machine as indicated on the plate approx 1 kg
on mine S320 i have instaled a fan with more blades and thermostat like yours. tha was sufient to keep below 100º. nice milliage - 124K for a W124 ;) thanks for nice video as well.
Hello, this is a very interesting and informative video. Please allow me to ask two questions, as my knowledge of physics is unfortunately limited: if I have understood correctly, the resistor "tricks" the thermal switch or the control unit into thinking that the original switching point of 107 (?) degrees Celsius has already been reached and thus switches on the auxiliary fans, which would then be switched on at level 2. Is this correct as far as it goes? I found a few videos on RUclips in which users do this, but they all use different resistors. One uses a 1 K Ohm resistor, another uses a 1.5 K Ohm resistor and you have chosen a 1.8 K Ohm resistor. How do you calculate the influence quantity? Is there a formula here? Is it correct to assume that, for example, the 1 K ohm resistor switches on at 92 degrees, the 1.5 K ohm resistor at 95 degrees and the 1.8 K ohm resistor at 98 degrees Celsius? (The temperature values are only invented examples!) ? If I have understood this correctly and stage 2 is then switched at the "107 degrees", is there a possibility of only switching stage 1 or is this only possible by tapping into the pressure switch of the air conditioning system? The second question is as follows: in the German edition of the WIS it is written that at least at LH (I don't know if also at KE and ME) when reaching 107 degrees Celsius and thus switching on the two electric fans, the performance of the air conditioning is throttled in order to minimise the thermal load a little. So, if my understanding is correct and a resistor commands the control unit to reach 107 degrees Celsius and thus "switch", would the air conditioning then also be throttled? And if so, did you notice this in your test or is it negligible? Thanks in advance for your answer and greetings from Germany, home of your cars. :-) Greetings, Heiko
Hi 1. I used a 1.0K ohm resistor on my car. I was told a 1.2K ohm resistor would activate the fans at 100C and tried that first. With that knowledge I wanted to lower it. The 1.0K turns on the fans at approximately 95-98C. 2. The resistor does not command the control unit to reach 107 early. The AC still operates like the factory designed. Even with temperature at 105C my AC is still able to work. There is a specific switch and sensor just for the Auxiliary fans that do not affect anything else and a separate switch for the ECU(my car being HFM). Something else that occurs is that the low speed fans will activate sooner as well. Normal operation is that outside temp must be 80F or above to work. This will work at lower outside temps when AC is activated. All the resistor does is allows the fans to activate at a lower temperature to bring the temperature down sooner. Engine still operates like it is designed. If you do the thermostat and the fan clutch as well the main benefit you will see is timing no longer being retarded under most instances. AC will not cut off because the car will never reach that high of temperature. Warm up cycle is minimally impacted to were most people will never notice a difference. There are only benefits to doing these modifications if your car is constantly running over 100C.
Ambient temps in the mid 70s while driving, resistor on cts mod, 70-something degree thermostat, with new visco-fan....I'd say the engine temp at 100 even when going up hill and ac on is mediocre at best. I bet you can get those temps down a lot lower. I wonder if you redid your test with everything except the fan clutch, and made a custom shroud around your aux fans, if your temps would be a lot lower. I used heavy duty black felt fabric as a shroud and it works great at funneling air. I get about 90 degrees engine temp with ambient outside temp at 105+ degrees with ac on and no fan clutch, just modded dual aux fans turning on at 92 degrees with the stock 87 degree thermostat. I'm in Socal....desert area.
I live in the Middle East, temperatures here in summer reaches 57 celsuis(134.6 F), all Mercedes models (not only W124) suffer engine overheating, probably this environment not suitable for Mercedes. Far east cars (Japanese and Korean) are doing well though, they are cool all year long!. Thanks for the video and information.
@@mohamedamer8833 Hi A newer model of Mercedes fan like 2001 and up or fan of sangyong which is Korean car with old fashioned Mercedes engine Sangyong 2007 -2015 came with m104 Mercedes If you want more information contact me to send you a picture or short video from my car I have sangyong 2012 made for middle east with mechanical fan and m104 engine all original from sangyong with the car I bought used sangyong electric fan for the same model but made special for Europe Sangyong cars Honestly I'm not electronic man I took the fan to qualify workshops The fan cost me 50$ The workshop + wires + cutout + relays cost me another 50$ But there is a noticeable difference in horsepower and a real stable in engine temperature The sangyong temperature Guage inside dashboard same as Toyota without numerical number but I'm obsessed man 😁 Therefore I have my own OBD scanner which is always connected to the car... so temperature engine m104 is raised upto 100c in severe driving condition with 51c weather I really mean severe driving. ... my normal driving is like a race ..... I'm in country with no role in speed limit The 100c degree at 51c weather without A/C Because only the slow speed degree of fan But when I using A/C The engine temperature becomes 89c at severe driving and about 91c at long time stops at the same 51c weather Many Many mercedes and BMW cars in Iraq change to electric fan 🌹🌹
@@mohamedamer8833 Welcome my friend 🌹 By the way there's a lot of Arabic video in RUclips about changing mercedes fan to electric fan if you want i can show you some
it's funny how a M119 is different!!!! mine in 90 degrees weather ( Florida) in traffic with A/C in low never goes over 100 in engine temp ( mostly between 80 and 100 mark)
Good job Easier way Change the mechanical fan to electrical fan All the problems of overheating will be solved and disappear You can use mercedes fan for newer models or Korean cars like sangyong which it has exactly the same of your engine but with electrical fan And I'm sure sangyong fan cheaper than mercedes fan I do it to my car where the weather is 51 c
Great Video. I have seen a few of yours. I have a 95 E320 Imperial Red Coupe. I really want that front bumper/kit. Is there anywhere affordable to get one?
Excellent video,I would to do these mods to my 1992 Euro-spec 300CE-24 Sportline (Getrag 5-speed) that resides in Texas. Where do you buy the resistor? Thank you for this. It would great to bring the operating temp down,
Resistor mod is a must in those. I did this years ago and my W124 temp stays always dead at nine even in hottest summer and A/C on. Its a MB Design flaw, let's be honest here. But fanboys will always laugh (and drive their MBs into 105+C temp ranges... not good)
Please explain the resistor again on the fan switch? I have a 16 valve 190e and getting the fans to kick in earlier would be great in the summer heat. My car does not have that type of fan clutch. It has a magnetic fan clutch.
The resistor allows for the electric fans to kick on sooner by tapping into the coolant temperate sensor, this sensor on m104 and m103 is only for the electric fans. I believe this is also possible on a 16v as well if it has electric fans which I believe cars with ac do. There is likely a separate sensor for the magnetic fan clutch since it’s also temperature based. If it uses the same 2 pin design as the m104s sensor then a resistor can be added as well to make it engage sooner.
@@SoCal210 Actually, I just looked up the temp switch for the magnetic fan clutch. Its a red 3 prong switch 100/110C temp range. I guess this mod wont work but thanks.
So I’m thinking if the cooling system is already in good working order and is fairly new. Installing the resister only may do the trick. Your thoughts??
I would highly recommend doing the thermostat as well. It’s what allows the cooling system to be able to get cool. My friend did just the thermostat on his 1995 E320 wagon and it helped tremendously. The resistor would allow for the electric fans to kick on sooner when you are sitting still. The fan clutch helps when the engine is revving up. Anything is better than nothing so I would prioritize it as thermostat, resistor, fan clutch if you don’t do all three.
My fans turn on at 105 degrees Celsius, 124C engine m104.992, the viscous clutch is broken, it is constantly in function, I've been driving like that for 15 years...
Hello I have a 1987 300d turbo w124 I am restoring. I would like to do this to my car but I have the 3 pin temp switch. Will this still work on my car.. the switch has 2 pins together and one infront . Can this be done on my switch. Thanks for the video and your time. Robert
My coolant is bubbling and it's making noise The thermostat is already changed.. this happens always when the engine is off and after a little bit driving. The coolant is bubbling for 5 min and after a while the noise is reducing.. I think that i need to change the water pump?
Sounds like there is air in the system. Make sure to bleed it completely. I put the part numbers of the thermostat housing with bleeder screw in the description. That part will make it a lot easier to bleed the cooling system.
I had a question how come when you turn the A/C on you put on the setting where the A/C blows out of not just the four vents but also the floor vents down below? The center button setting the A/C blows out of the four vents up top. But then again maybe you like the A/C coming out of the floor vets too.
The blue sensor is the temp switch on earlier cars. The later ones had the temp switch and the sensor for the ecu built together. I showed this in the video and how to put the resistor on that one too
@@SoCal210 I have 1989 model 300SEL it also have blue sensor but some people were saying it should have other one with 3 pins (not 4) but did not figure it out what they were talking about. I guess since my car has also blue 2 pin sensor its the one I should put the resistor on...
I did convert mine on electric fans 2x12in,with AC on driving in 110-115deg at 80-9mph temp below 100,id say 98-99,if i let slower lets say 70-75mph temp drops to around 95deg.Also fans are setup to kick in at 88-90deg .The most beautiful part is that engine runs way lighter without that fan clutch engaged.
@@mihu202 I just hooked up a spal brushless aftermarket 15" inside the OE shroud. Put the temp sensor in the water pump. Kicks on slowly at 87c ramps up and goes full speed at 101c and when the AC is on. 79c thermostat. It came out perfect. Temp Guage stays right in the middle. Youre right, waaay better than a fun clutch.
The resistor alone will help a little but really needs to be paired with the lower temp thermostat. The fan clutch isn’t 100% needed but it does make an improvement.
Hello, just watched your video, I own a 1991 300ce w124. Will the thermostat and fan clutch you recommend fit my vehicle? Also where did you purchase the fan clutch..Thx. Dray
hey man, it is okay to use 71 degree celsius of thermostat ? since the 75&79 is hard to find in my country, btw I’m using the E320 W124 with 5 speed dog leg manual
I did this on my w210 2.3 petrol engine it does kick in fans early but resistor also changes temperature on my instrument cluster is something wrong with my wiring ?
If your coolant temperature sensor doesn’t look exactly like the ones I showed and you didn’t put the resistor in exactly like I demonstrated then it could do that.
I saw on google people commenting if it would be possible to put the head of the pagani with the m120 engine in the m104 engine, is it possible to put the head of the 6.0 v12 or 7.3 v12? What parts of the Zonda m120 are possible to install?
Remember under emergency running mode that you ac compressor will disengage and your ignition will be set back to take off some of the stress for the engine. Cooling upgrades are great if you k ow what your doing. But having the AC compressor turning off all the time due to your resistor mood are not the way to fmdo it in my opinion.
The ac compressor does NOT turn off with the resistor. The resistors will make the fans turn on at a lower temp regardless of ac. This does not affect the timing unless the engine coolant temperature reach 95C+. At 95C that is when the timing will begin to retard. My ac compressor does not disengage unless it gets to 107C which is when it is designed to disengage. There are only positives to doing these cooling upgrades.
Cool mods enjoy your channel, just wondering where did you buy the fan clutch and how much? # 2100 006 243 , after researching this part its a tropical fan clutch ,for really hot climates, I'm in Temecula CA and it gets very hot here during summer months, its for our 1992 M103 , thanks!
I was able to find an OEM one on eBay. They still sell them new at the dealer. You can find them from any online parts seller if you search for a fan clutch for a 1995-1997 C36 AMG.
@@SoCal210 Just checked eBay, Sachs part number: 2100 006 243 comes up but sold out, been searching the net ,lots of C36 Fan Clutch: 104-200-01-22 , but they don't list manufacture part number 2100 006 243, when I find that combination will buy, lots of them 2100 006 243 over in Europe. Thanks will keep searching.
So found tons of the SACHS in the UK , Germany, but they can't ship to the USA due to Covid-19, I can modify mine by bending the Bi-metallic strip, that will lock the fan at lower set point, until I can find a SACHS. ruclips.net/video/AIqEIBeL8Rw/видео.html
Does AC still work when ECU turn's on the el fans for cooling the engine down? I use to have a switch in a cabin in my 3000E M103 to turn on the el fans but when I did that the AC would work cause ECU would think that the engine is overheating so it shuts the AC down.
The AC will still work normally. The AC is designed to be cut off at 107C from the factory. The AC will trigger the fans to be on low speed if ambient temperature is 80F or higher. With the 1000ohm resistor the fans turn on at around 95C and should never get to 107C so the AC will stay on. If it does get 107C or higher the AC will turn off.
@@SoCal210 Yeah, I didn't have the resistor, I just wired the switch to the M103 thermo switch so the ECU must have tought that the engine is overheating and it switched off the AC every time I turned AUX fans on
I have a 93 300e and I’m okay with my temperatures it’s just when I’m idling my car cannot keep itself cool. I can’t be in drive thrus because of this. Would you still recommend this whole process?
As I’m typing this I’m at the innout drive thru line and I just remembered that when my temp is in the middle of 100 and 120 mark, my fans turn on and bring the temp down to 100.
SoCal210 one more question 😅, I’m having trouble finding the Sachs fan clutch, would you know if the “Replacement” brand fan clutch for c36 would be any good?
The resistor will make the auxiliary fans turn on at a lower temp. The factory specification is 107. A 1000 ohm resistor will make it come on at 95 instead. 1200 ohm at about 100
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I did this to my s124 wagon last summer after watching your video. I live in Las Vegas where ther temp get up to 115°f in the summer. I can drive ny car all day with the AC on and it barely gets over 100° C on my gauge. Well worth the price to do this. Thank you so much
Glad to hear!
Its to hot for my country, indonesia...
@@paman_pekos8975 saya pemakai 300GE. Mesin mercedes m103 tidak apa² jika temperature mencapai 100c. Itu normal, apalagi macet macetan dijakarta. Saya merawat mobil ini sendiri sejak lama, bahkan menurut saya saran montir mercedes di indonesia banyak yang menyesatkan.
untuk sistem pendingin, saya tetap pakai thermostat 87 dan visco fan yg normal (tidak dipaten)
Mesin mobil saya lebih responsif dan bertenaga jika temperature kerja di 90c, dan 100-105c ketika macet macetan. Karena operating temperatur m103 adalah 80c sampai 110c. Lebih dari itu, mesin baru bisa dibilang overheat.
tentunya jika mesin mobil dipakai di temperature yg lebih tinggi, bensin akan lebih irit dibanding temperature normal.
INGAT, KE-Jetronic bekerja sesuai temperature mesin. Jadi temperature kerja mesin m103 sangat penting untuk diperhatikan agar performa mesin bisa maksimal
I have a W202 C280, also in Las Vegas and I'm thinking about doing the same. Stock setup was good in New York but the needle gets a little too close to 100 during the summers.
@@betadimas8384om, dgn suhu yg sampe 100 coolant cpt habis ga ? boxer saya skrg bisa sampe 100 jg, tp coolant cpt meluap keluar dari selang kecil di tabung, apa itu normal ?
Jesus christ!!! This has to be one of the most cleanest W124 I've ever seen!
Thank you!
In Middle East the weather is boiling in Summer temperature reach 50c
We modified the system by replace thermostat with 65 or 72 degree Celsius , and beside 2pins coolant temp sensor addi1 pin 85/80 sensor.
The car run at 85 , aux fan run at 85 and off at 80.
Thanks for your video. I did it with my car a week ago. Since then temp never touch 100. Thanks again
Awesome video! As someone that lives in subtropical Australia and has an M104 powered W140, these are a must.
I actually used a high flow version of a thermostat for a W123 300D, apparently the diesel ones work really well to keep the temps down as they run much hotter.
The resistor mod is a cheap, easy hack for those in high traffic areas!
I carry winter and summer thermostats for my m104 140 here in California. Also good for keeping your transmission fluid in good shape.
Giving the transmission a dedicated oil cooler will drop coolant temps during long hill climbs with low revs too. The oil gets heated up really good while being slushed around in the torque converte since there is no lock up clutch. This heat then gets dumped into the cooling system.
Just changed my fan clutch from NRF, still after watching this, may consider getting a c36 clutch after this one dies, but guess will try to get it now as they are really rare, changed my old radiator to the new one from Nissens, and the thermostat from Febi Bilstein as well, all done last summer. Gotta say it improved a lot to my weekend drives during summer. Will stay updated on how to maintain my 4 wheeled beauty thanks to you man. Best regards !
its all good but nly fan clutch that does good job is from sachs like in this video , nrf break down fast or its already broken when its new (constantly operating)
I have a 95 A124 that is having similar work done on it this week. Living in AZ I worry about my car overheating. This was timely. Thank you.
This was a really great tutorial, very clear and concise. Thanks for doing the demo too!
Thank you!
I removed the fan on my 1987 300d and added a pair of mishimoto 12in fans and davies craig digital fan controller. Now my car never gets over 85c with ac on In 95 deg days. And no more power loss from the fan.
Made a huge difference in the way it drives.
I'm going this route but because the 300E i6 is, well, an inline 6, the effective space between the radiator and the engine is only 8.5 cm (3.33") I'm having so much trouble finding a slim enough fan to fit. Here in Saudi Arabia it gets to ~48C (could exceed 120F in a good day).
Would you kindly link me, or just give the model no., to the exact same fans you installed? If your radiator is as wide and high as mine, I guess it's safe to use 2 fans, but I need to check the depth first. Much obliged.
@SG-cm7zq I only have 3 inch clearance and they fit in mine. Just positioned then for clearance. My car on 95 deg day runs right on the 80c mark with ac on.
Es el cabrío con el que todos soñamos.
Una verdadera maravilla sobre ruedas.
definitely doing the resistor trick on my E420! Just picked it up and don't like that it waits till 107... Love your cars btw, looking for all kinds of tips and tricks for the W124 platform as this is my first, already loving it!
Thanks! The resistor worked great on the E500 in the video as well. I’m looking into if there is a cooler thermostat and fan clutch for the m119. Super cool manual swapped C55 that you did! One of my favorite m113 cars.
@@SoCal210 yea I will also aid you in that search and update you if I find anything. Thank you!
A Turkish song says; Red suits you very well. Very nice vehicle, I loved it.
Thats an awesome mod on the cooling system.
I owned w124 E320 sedan 10 years ago . Everything as came from factory . Fan switch single pole kick if .A.C on or if reached 100C .. The most important thing that reduce coolant temperature is refrigerant must be filled with machine as indicated on the plate approx 1 kg
The best solution to this problem 👍 Thanks
Superb condition, great refresh
on mine S320 i have instaled a fan with more blades and thermostat like yours.
tha was sufient to keep below 100º.
nice milliage - 124K for a W124 ;)
thanks for nice video as well.
This thermostat fits 1997 s320
116 200 00 15 thermostat??
@@josebetancourt6064 S320 engine are the same from 1993 till 1998, so I think that will fit.
@@josebetancourt6064 A1032000423
Hello, this is a very interesting and informative video. Please allow me to ask two questions, as my knowledge of physics is unfortunately limited: if I have understood correctly, the resistor "tricks" the thermal switch or the control unit into thinking that the original switching point of 107 (?) degrees Celsius has already been reached and thus switches on the auxiliary fans, which would then be switched on at level 2. Is this correct as far as it goes? I found a few videos on RUclips in which users do this, but they all use different resistors. One uses a 1 K Ohm resistor, another uses a 1.5 K Ohm resistor and you have chosen a 1.8 K Ohm resistor. How do you calculate the influence quantity? Is there a formula here? Is it correct to assume that, for example, the 1 K ohm resistor switches on at 92 degrees, the 1.5 K ohm resistor at 95 degrees and the 1.8 K ohm resistor at 98 degrees Celsius? (The temperature values are only invented examples!) ? If I have understood this correctly and stage 2 is then switched at the "107 degrees", is there a possibility of only switching stage 1 or is this only possible by tapping into the pressure switch of the air conditioning system?
The second question is as follows: in the German edition of the WIS it is written that at least at LH (I don't know if also at KE and ME) when reaching 107 degrees Celsius and thus switching on the two electric fans, the performance of the air conditioning is throttled in order to minimise the thermal load a little. So, if my understanding is correct and a resistor commands the control unit to reach 107 degrees Celsius and thus "switch", would the air conditioning then also be throttled? And if so, did you notice this in your test or is it negligible?
Thanks in advance for your answer and greetings from Germany, home of your cars.
:-)
Greetings, Heiko
Hi
1. I used a 1.0K ohm resistor on my car. I was told a 1.2K ohm resistor would activate the fans at 100C and tried that first. With that knowledge I wanted to lower it. The 1.0K turns on the fans at approximately 95-98C.
2. The resistor does not command the control unit to reach 107 early. The AC still operates like the factory designed. Even with temperature at 105C my AC is still able to work. There is a specific switch and sensor just for the Auxiliary fans that do not affect anything else and a separate switch for the ECU(my car being HFM). Something else that occurs is that the low speed fans will activate sooner as well. Normal operation is that outside temp must be 80F or above to work. This will work at lower outside temps when AC is activated.
All the resistor does is allows the fans to activate at a lower temperature to bring the temperature down sooner. Engine still operates like it is designed. If you do the thermostat and the fan clutch as well the main benefit you will see is timing no longer being retarded under most instances. AC will not cut off because the car will never reach that high of temperature. Warm up cycle is minimally impacted to were most people will never notice a difference. There are only benefits to doing these modifications if your car is constantly running over 100C.
Thank you very much and an excellent journey at all times with your Mercedes-Benz !
Thanks will try on my R129 with m104, that always a bit over 100 in summer
Have you considered electric fan swap? a higher CFM fan radiator temp controlled or dual fans? would probably net another 10 engine HP too.
Ambient temps in the mid 70s while driving, resistor on cts mod, 70-something degree thermostat, with new visco-fan....I'd say the engine temp at 100 even when going up hill and ac on is mediocre at best. I bet you can get those temps down a lot lower. I wonder if you redid your test with everything except the fan clutch, and made a custom shroud around your aux fans, if your temps would be a lot lower. I used heavy duty black felt fabric as a shroud and it works great at funneling air. I get about 90 degrees engine temp with ambient outside temp at 105+ degrees with ac on and no fan clutch, just modded dual aux fans turning on at 92 degrees with the stock 87 degree thermostat. I'm in Socal....desert area.
I live in the Middle East, temperatures here in summer reaches 57 celsuis(134.6 F), all Mercedes models (not only W124) suffer engine overheating, probably this environment not suitable for Mercedes. Far east cars (Japanese and Korean) are doing well though, they are cool all year long!.
Thanks for the video and information.
قم بتغيير المروحة الميكانيكية الى كهربائية تنتهي كل المشكلة
@@hassanhadi8325 How is that possible? what Electric fan could fit in my old W124 without damaging the engine harness? thanks for the comment
@@mohamedamer8833
Hi
A newer model of Mercedes fan like 2001 and up
or fan of sangyong which is Korean car with old fashioned Mercedes engine
Sangyong 2007 -2015 came with m104 Mercedes
If you want more information contact me to send you a picture or short video from my car
I have sangyong 2012 made for middle east with mechanical fan and m104 engine all original from sangyong with the car
I bought used sangyong electric fan for the same model but made special for Europe Sangyong cars
Honestly I'm not electronic man
I took the fan to qualify workshops
The fan cost me 50$
The workshop + wires + cutout + relays cost me another 50$
But there is a noticeable difference in horsepower and a real stable in engine temperature
The sangyong temperature Guage inside dashboard same as Toyota without numerical number but I'm obsessed man 😁
Therefore I have my own OBD scanner which is always connected to the car... so temperature engine m104 is raised upto 100c in severe driving condition with 51c weather
I really mean severe driving. ... my normal driving is like a race ..... I'm in country with no role in speed limit
The 100c degree at 51c weather without A/C
Because only the slow speed degree of fan
But when I using A/C
The engine temperature becomes 89c at severe driving and about 91c at long time stops at the same 51c weather
Many Many mercedes and BMW cars in Iraq change to electric fan
🌹🌹
@@hassanhadi8325 Thank you so much...I will consider this. Many regards to you and to beloved Iraq.
@@mohamedamer8833
Welcome my friend 🌹
By the way there's a lot of Arabic video in RUclips about changing mercedes fan to electric fan if you want i can show you some
I have a C36 AMG and it's the same 104, if I run hi speed it on a 20 minute steep climb it slightly goes above 100C. Regards
it's funny how a M119 is different!!!! mine in 90 degrees weather ( Florida) in traffic with A/C in low never goes over 100 in engine temp ( mostly between 80 and 100 mark)
Yeah I noticed that as well! I think the aluminum block helps as well as the increased coolant capacity.
Good job
Easier way
Change the mechanical fan to electrical fan
All the problems of overheating will be solved and disappear
You can use mercedes fan for newer models or Korean cars like sangyong which it has exactly the same of your engine but with electrical fan
And I'm sure sangyong fan cheaper than mercedes fan
I do it to my car where the weather is 51 c
Great Video. I have seen a few of yours. I have a 95 E320 Imperial Red Coupe. I really want that front bumper/kit. Is there anywhere affordable to get one?
The cheaper ones from duraflex are available but the quality, fit and finish is pretty low on the front bumper.
@@SoCal210 thanks man. i think i remember you said you sourced yours from a junkyard somewhere?
I found it on Craigslist
nyce! @@SoCal210
Thanks for this method bro! It works!!! BR from 124 Moscow))
Excellent video,I would to do these mods to my 1992 Euro-spec 300CE-24 Sportline (Getrag 5-speed) that resides in Texas. Where do you buy the resistor? Thank you for this. It would great to bring the operating temp down,
I bought the resistor on Amazon. If you check the description you’ll see I posted a link to the same one I used.
Heh your odometer at this point said "124"-000 miles
So the thermostat housing and fan clutch are only for the M103, M104 platforms?
Resistor mod is a must in those. I did this years ago and my W124 temp stays always dead at nine even in hottest summer and A/C on. Its a MB Design flaw, let's be honest here. But fanboys will always laugh (and drive their MBs into 105+C temp ranges... not good)
What kind of resistor should i've put on? How many omps?
Great video. Just picked up a 93 2.8, and live in Az. Lol Do you have the part number for the Sachs fan clutch? Thanks in advance.
The Sachs part number is 2100 006 243. I listed the factory part number as well as the other parts I mentioned in the description.
@@SoCal210 Thanks again. Really appreciate it.
Добрый день! А на моторе m111 e230. W210 1995года могуле я применить подобное ? И какой резистор брать ?
Спасибо!
Does that resistor mod also works on my 200d w124? It has that same 2 pin sensor but its a eletro magnetic sensor not a clutch
Please explain the resistor again on the fan switch? I have a 16 valve 190e and getting the fans to kick in earlier would be great in the summer heat. My car does not have that type of fan clutch. It has a magnetic fan clutch.
The resistor allows for the electric fans to kick on sooner by tapping into the coolant temperate sensor, this sensor on m104 and m103 is only for the electric fans. I believe this is also possible on a 16v as well if it has electric fans which I believe cars with ac do. There is likely a separate sensor for the magnetic fan clutch since it’s also temperature based. If it uses the same 2 pin design as the m104s sensor then a resistor can be added as well to make it engage sooner.
@@SoCal210 Actually, I just looked up the temp switch for the magnetic fan clutch. Its a red 3 prong switch 100/110C temp range. I guess this mod wont work but thanks.
bro can you diagnostic my engine
i just bought e320 and wanna be sure everything its ok with engine)
Will this work on a r129 m104? I have a twin turbo one that gets pretty hot.
so a fan clutch off a c36 would work
just as well?
So I’m thinking if the cooling system is already in good working order and is fairly new. Installing the resister only may do the trick. Your thoughts??
I would highly recommend doing the thermostat as well. It’s what allows the cooling system to be able to get cool. My friend did just the thermostat on his 1995 E320 wagon and it helped tremendously. The resistor would allow for the electric fans to kick on sooner when you are sitting still. The fan clutch helps when the engine is revving up. Anything is better than nothing so I would prioritize it as thermostat, resistor, fan clutch if you don’t do all three.
My fans turn on at 105 degrees Celsius, 124C engine m104.992, the viscous clutch is broken, it is constantly in function, I've been driving like that for 15 years...
Hello I have a 1987 300d turbo w124 I am restoring. I would like to do this to my car but I have the 3 pin temp switch. Will this still work on my car.. the switch has 2 pins together and one infront . Can this be done on my switch.
Thanks for the video and your time. Robert
Only if you can figure out what those pins do. If you find out which of those 2 pins function the same as the 2 pin switch you can do this
I use the w140 and if I just change the thermostat will it cooler or not
too hot for me, have a 70c stat, poly gycol at 100% no water. drill two small holes in stat for faster bleed
My coolant is bubbling and it's making noise
The thermostat is already changed.. this happens always when the engine is off and after a little bit driving. The coolant is bubbling for 5 min and after a while the noise is reducing..
I think that i need to change the water pump?
Sounds like there is air in the system. Make sure to bleed it completely. I put the part numbers of the thermostat housing with bleeder screw in the description. That part will make it a lot easier to bleed the cooling system.
The temperature between 80 and 120 .it is 90 or 100?
When you mentioned the orientation for the thermostat, what exactly did you mean?
There’s a tiny vent hole on the thermostat that needs to be placed at the highest point.
Is it possible to make the noise of the m104 engine the same as the rb20det engine?
How about for m103 like 190E 2.6 and 86-92 260E-300E. Can you show where the proper coolant sensor is to install the resistor?
I am planning on making a part 2 to this video and will show it. It is under the airbox. Removing it makes it much easier.
I had a question how come when you turn the A/C on you put on the setting where the A/C blows out of not just the four vents but also the floor vents down below? The center button setting the A/C blows out of the four vents up top. But then again maybe you like the A/C coming out of the floor vets too.
Just personal preference. Sometimes I have it
Blow just out the four vents.
good car good conditions
thank you
Some people say that you should put the resistor on temp switch, so not on the blue sensor. What is your experience with that? Would it also work?
The blue sensor is the temp switch on earlier cars. The later ones had the temp switch and the sensor for the ecu built together. I showed this in the video and how to put the resistor on that one too
@@SoCal210 I have 1989 model 300SEL it also have blue sensor but some people were saying it should have other one with 3 pins (not 4) but did not figure it out what they were talking about. I guess since my car has also blue 2 pin sensor its the one I should put the resistor on...
Hallo may car acon is not working I tonno wat is heperner bleas help
Cool video, pun intended
Type or size of the resistance and colors please 🤝🤝🤝 I really needed please 🙏🙏🙏🙏
1000 OHM. Everything is listed in description along with links to purchase
Will 820ohm work
You should try electric cooling fan. And let us know if it works, and how to do it if it does work
I did convert mine on electric fans 2x12in,with AC on driving in 110-115deg at 80-9mph temp below 100,id say 98-99,if i let slower lets say 70-75mph temp drops to around 95deg.Also fans are setup to kick in at 88-90deg .The most beautiful part is that engine runs way lighter without that fan clutch engaged.
@@mihu202 I just hooked up a spal brushless aftermarket 15" inside the OE shroud. Put the temp sensor in the water pump. Kicks on slowly at 87c ramps up and goes full speed at 101c and when the AC is on. 79c thermostat. It came out perfect. Temp Guage stays right in the middle. Youre right, waaay better than a fun clutch.
@@hggryrdchgc awesome happy to hear about the positive outcome.Wish I could have gone with a single 15” ,to tight for my platform.👍🏻
Can just the resistor upgrade accomplish this? Is the C class fan clutch necessary?
The resistor alone will help a little but really needs to be paired with the lower temp thermostat. The fan clutch isn’t 100% needed but it does make an improvement.
Does the M104 engine have 2 coolant temperature sensors? One for the gauge, and one for the ECU right?
I think it actually has 3. One for the ECU, one for the gauge, and one for the fan controller. The resistor goes in the sensor for the fan controller.
@@SoCal210 Thanks.
Hello, just watched your video, I own a 1991 300ce w124. Will the thermostat and fan clutch you recommend fit my vehicle? Also where did you purchase the fan clutch..Thx.
Dray
Saw where you could buy the Clutch on another reply, but still trying to find out if it will fit on my vehicle..thx again
It will fit your car. Works on M103 and M104 engines
@@SoCal210 👌🏼
hey man, it is okay to use 71 degree celsius of thermostat ?
since the 75&79 is hard to find in my country, btw I’m using the E320 W124 with 5 speed dog leg manual
Yeah it’s fine as long as it fits
@@SoCal210 thanks for the reply bro
the 87 version of thermostat are pretty hot for tropical country
I did this on my w210 2.3 petrol engine it does kick in fans early but resistor also changes temperature on my instrument cluster is something wrong with my wiring ?
If your coolant temperature sensor doesn’t look exactly like the ones I showed and you didn’t put the resistor in exactly like I demonstrated then it could do that.
I saw on google people commenting if it would be possible to put the head of the pagani with the m120 engine in the m104 engine, is it possible to put the head of the 6.0 v12 or 7.3 v12? What parts of the Zonda m120 are possible to install?
It is not possible to do that
I would Chang the radiator to
Did you notice any decrease in fuel economy after making these modifications?
0 change
@@SoCal210 awesome thanks. I was seeing a lot of conflicting into in the Benz forums. Have a nice day and happy motoring.
My wagon does this and I thought it wasn’t normal either
Heh his mileage began with 124
Can you provide the fan clutch part number.
104-200-01-22
Part numbers and link to everything I mentioned are in the description.
If I live in an area where the temperature hits >35 c in the summer and
I would also recommend the thermostat. It will help the resistor work better
@@SoCal210 Thanks!
Remember under emergency running mode that you ac compressor will disengage and your ignition will be set back to take off some of the stress for the engine. Cooling upgrades are great if you k ow what your doing. But having the AC compressor turning off all the time due to your resistor mood are not the way to fmdo it in my opinion.
The ac compressor does NOT turn off with the resistor. The resistors will make the fans turn on at a lower temp regardless of ac. This does not affect the timing unless the engine coolant temperature reach 95C+. At 95C that is when the timing will begin to retard. My ac compressor does not disengage unless it gets to 107C which is when it is designed to disengage. There are only positives to doing these cooling upgrades.
Cool mods enjoy your channel, just wondering where did you buy the fan clutch and how much? # 2100 006 243 , after researching this part its a tropical fan clutch ,for really hot climates, I'm in Temecula CA and it gets very hot here during summer months, its for our 1992 M103 , thanks!
I was able to find an OEM one on eBay. They still sell them new at the dealer. You can find them from any online parts seller if you search for a fan clutch for a 1995-1997 C36 AMG.
@@SoCal210 Just checked eBay, Sachs part number: 2100 006 243 comes up but sold out, been searching the net ,lots of C36 Fan Clutch: 104-200-01-22 , but they don't list manufacture part number 2100 006 243, when I find that combination will buy, lots of them 2100 006 243 over in Europe.
Thanks will keep searching.
So found tons of the SACHS in the UK , Germany, but they can't ship to the USA due to Covid-19, I can modify mine by bending the Bi-metallic strip, that will lock the fan at lower set point, until I can find a SACHS. ruclips.net/video/AIqEIBeL8Rw/видео.html
Are you sure that the c36 fan clutch fits the m103?
Yes. They are physically the same. We put on on my friends 190E 2.6
@@SoCal210 good to know I’m going to try it on my 300e.
Mine had a 4 pin
Does AC still work when ECU turn's on the el fans for cooling the engine down?
I use to have a switch in a cabin in my 3000E M103 to turn on the el fans but when I did that the AC would work cause ECU would think that the engine is overheating so it shuts the AC down.
The AC will still work normally. The AC is designed to be cut off at 107C from the factory. The AC will trigger the fans to be on low speed if ambient temperature is 80F or higher. With the 1000ohm resistor the fans turn on at around 95C and should never get to 107C so the AC will stay on. If it does get 107C or higher the AC will turn off.
@@SoCal210 Yeah, I didn't have the resistor, I just wired the switch to the M103 thermo switch so the ECU must have tought that the engine is overheating and it switched off the AC every time I turned AUX fans on
Can I do this on my 95 r129 ?
If it has an m104. If it has an m119 you can only do the resistor on the temperature switch.
What’s the Thermostat called again?
It’s a thermostat from a 1978 450SL. Part number is 116-200-00-15
I own 1995 E320 Convertible. I am not a mechanic and cannot install as you did. I live in OC. Would you help me install?
Sorry I am not a mechanic either.
@@SoCal210 Will adding a register make cooling work without changing a thermostat and fan drive?
Yes. However the fans may stay on longer because the thermostat will close sooner than the lower temperature one.
@@SoCal210 You recommend to change the thermostat to the one with 87 deg. C setting. It looks simpler to change thermostat than changing fan drive.
I recommend the 75C one. The 87 is what the original one is. The part number is in the description if you are interested.
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Semoga selalu Sehat, sabar & Bersyukur atas segala nikmat dan anugerah dari Alloh swt
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my Brother
What value is the resistor ?
1000 ohm
Thank you.
I have a 93 300e and I’m okay with my temperatures it’s just when I’m idling my car cannot keep itself cool. I can’t be in drive thrus because of this. Would you still recommend this whole process?
As I’m typing this I’m at the innout drive thru line and I just remembered that when my temp is in the middle of 100 and 120 mark, my fans turn on and bring the temp down to 100.
If it were my car I would do the whole process. The car’s ideal temperature is between 82-95C.
SoCal210 alright thank you I really appreciate your videos
SoCal210 one more question 😅, I’m having trouble finding the Sachs fan clutch, would you know if the “Replacement” brand fan clutch for c36 would be any good?
I’ve tried a behr but it’s not as good as the sachs. I wouldn’t try anything else.
What about ur 210
M112 and m113 cars usually never have cooling issues unless there is failure among one of the components.
What does the resistor do?
The resistor will make the auxiliary fans turn on at a lower temp. The factory specification is 107. A 1000 ohm resistor will make it come on at 95 instead. 1200 ohm at about 100
@@SoCal210 Thanks for the clarification. I might do that too.
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