How I fixed my Mercedes Benz S500 W220 melted fuse housing for the AC blower regulator.
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- Опубликовано: 20 сен 2016
- This video is something that I wish didn't happen. Unfortunately, Mercedes has electrical issues that haven't been fixed. I thought that my blower regulator had gone out again but it was actually a melted fuse holder for the blower that became the problem with my AC.
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Note: this was a recall on the S500 for the 2000 model. Why is it still happening on the 04 and above? This video shows you how I fixed my melted fuse box issue for a few bucks if that.
Disclaimer: DO NOT ATTEMPT TO DO THIS JOB IF YOU DO NOT KNOW ANYTHING ABOUT CARS OR ELECTRONICS. Thank you for watching and I hope that this helps you out. My loss of time is your gain in time. Have a blessed day!
Car Stereo Wiring Kit:
www.amazon.com/SoundBox-ECK4v...
Mercedes Benz AC Blower Regulator:
www.amazon.com/Bapmic-Blower-...
Mercedes Benz AC Blower:
www.amazon.com/BOXI-2000-2006...
how to change the valve cover gasket on a mercedes s500 w220.
Step by Step on how to change the valve cover gasket on W220 Mercedes s500. 00-06. Also similar to ML. E500, all V8 Model Mercedes Benz 00-06. g500, gl500, s430, ml500, e500 valve cover gasket
Valve Cover Gasket:
www.amazon.com/Genuine-Right-...
Air Filter:
www.amazon.com/Mann-Filter-36...
Spark Plugs. You will need 16 pieces Total:
www.amazon.com/Iridium-4Piece...
Ignition Coils: You will need 8 of these.
www.amazon.com/Bosch-Original...
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I truly respect people like you who spent your time making these videos to help others. I followed your video and replaced my valve cover gasket and it worked fine. However, I also did the breather cover reseal, the cleaning process was a pain in the ass. Thanks again man.
Cheers. I try me best when I can share. Blessings. Thank you for your support.
Great news. I did it on my S500 and wow working strong with beautiful cold air now after $300 of parts and finding out it was a melting fuse. Love this video!
Glad it helped you. Cheers.
Agree .. I have a big problem with my 2000 S500, at this time I am trying to learn how to fix it, watching your video and gave me some ideas, so I can fix my car.
Thank you
Yes. So much for german engineering huh? I still love my Euro. Cheers
Brilliant solution Peter. Good video with good details.
Peter hi there. great video here too and our conversation regarding you tracing an issue with the AC blower to the regulator replacement is what brings me here.
I followed your steps one by one on the other video, but no dice. Looking back it's entirely possible the blower and regulator were fine to start with. But, we bought new ones and that can't really hurt.
The problem for me turned out to be the Red/Yellow wire at the fusebox was fried. It was corroded at the juncture with the black plastic piece connecting both red/yellow wires AND both ends over an inch long on both sides of that plastic piece were fried.
I'm not an electrician, in fact I'm barely a driveway mechanic, but what we did was just cut the wire above each of the fried parts, stripped the wires on both ends, and wrapped them together(just to see if I was on to something) then covered in electrical tape. Wouldn't you know it, it worked. The fan came on immediately when turning the key. Problem solved - now just need to wrap the connected copper wires better than twist and tape. Thank you sir for at least showing me where to start looking. A thousand thumbs up for you.
Awesome. See if you can use a clamp to route a fuse next to the blower regulator. I'm sure you can figure it out. I told you, these models are known to have faulty fuse holders. I'm so glad it helped. Cheers. Thank you for watching and subscribing.
I never did comment when i first saw & proceeded to do this. But as of now 2/17/2017 in Cleveland, Oh my 2005 & 2002 S500, 2001 CL600 & 2004 SL500 have been blessed with heat because of Peter. Thx
MessiaH0288 I am so glad to had been a part of your fix. love it. thank you for watching.
I had no idea about those fuses. I will check those! Thank you for these videos! I will subscribe!
man you saved me a bunch of dollars thanks bro great video!
Okay, thank you. I might comment with more questions when I have the chance to work on this this weekend. Appreciate your videos dude!
Daniel Carey no problem bro. just make sure you hold the wire down when unbolting the positive wire on the distribution block so you don't cause a spark.
Daniel Carey btw, I explained where I probed the wires together at around 10:50. thank you.
That's awesome keep up the good work.
Work arounds are sometimes the only way to keep these things running and reliable.
Yes. Pretty bad design to be honest. Cheers
Exceptional workmanship also very helpful I'm backup and running now I've got a spare fan and a control unithe control in it on the shelf it goes
Cheers. Thank you
thank you have same problem and will try your solution. Thanks again
Fixed mine similar to yours. Thanks for posting this video. Mine works great.
Awesome. Glad it helped. Cheers
I have the exact same car and they said that my ground wire to the engine bay was getting no power this is the ground fix for that exact problem I have a Mercedes S500 2003 which suffered water damage on the passenger side I changed all these boxes and still wouldn't get a good read on the ground my blower motor also would not get any power to the fuse relay nor with my starter enabling my car to be in limp mode due to the computer not starting if the blower doesn't work thank you for the very educated video
Yes. A very big design flaw on mercedes. Cheers
Okay I got it out and have diagnosed using those directions and also from a Forum I was reading. looks like mine had the original heat/resistance problem that caused the fuse housing to melt. However combining the two problems (speculation) I think what this comes from is a bad blower refusing to spin as it's reaching the end of its life cycle causing the resistance/heat problem in the fuse box. So signs of a bad blower going out could be what caused the fuse box problem. And by bypassing the fuse box problem made the problem in the actual blower appear. That is my best guess after weeks of toying with this reading up on it and now working on it a third time. I have a used blower motor that's better than mine hopefully this one works. will update.
Daniel Carey possibly yes. the only question I have is that if the fuse issue was removed to begin with, then even the blower reaching it's end of life Shouldn't create enough resistance to melt the fuse housing regardless if the blower did in fact create the issue. the rating of the wire should prevent that from happening. but.. the regulator can fail prematurely if the resistance of the wire is high which was the case of the fuse housing. I've yet to see a blower motor fail from having high resistance on the feed wire. but I can completely see the issue of a regulator burning up with high resistance from the fuse. Remember, the regulator is between the source (fuse) and blower so the regulator will suffer before the motor. hopefully you figure it out. let me know. cheers.
I just watched your video. Excellent video, by the way! So, I looked up recalls for the 2001 Mercedes S500 and it has been on recall since 2004. I don't think that they did the job as well as you did because all they do is replace the fuse holder. I smelled burning plastic, stopped the car, lifted the hood but could find nothing - I figured that I would find out, eventually, what it was. Shortly after, I heard a weird sound, almost like a fan scraping something and then my fan quit.
The HVAC blower motor may lose power because the fuse for the circuit may lose contact. This is due to a flaw in the plastic holder that secures the fuse that protects this circuit. If the fan stops working, you may not be able to clear fog and frost off of your windshield. If visibility is reduced, you could be at risk of getting into an accident. Dealers will install new blower motor fuse holders. This recall began during October 2004. The Mercedes-Benz recall number is 2004 070010.
Jay Kay thank you for watching. yes unfortunately, mercedes never really fixed the issue. I would think that they knew the sam units weren't good on the 01 models but it seems like they used the same ones for the newer models. regardless, problem fixed. thanks again.
put the other fan in and so far it's working. So looks like regulator is fine and our fuse problem is fine. I'll update if it fails but keeping my fingers crossed.
This is almost the exact problem that I have with my 2006 S350! The 40A fuse is melted the same way and broke apart the same way. However, from the 4-pin DIN, I get the variable voltage correctly from the fan signal line, but not the +12V.
Yep. So you will need to fix that fuse problem as that is the main 12 volt constant power.
@@PeterZafra Is the lack of the +12V power due to a problem with the center console? When I run the test (holding REST + filter), it indicates all dashes (no error code). If it is a problem with the center console, can I just run +12V power like you did in your video?
🎉good work
Cheers
I believe to connect the red with with the power source.. why i have to connect the yellow line.. its not 12v + you said yellow line give around 6v... Can you please explain more... Thanks
Question... Is that fuse responsible also for compressor engaged/ working... Coz sometimes fan is work but compressor not function... No cold air comes out....
Great video man. Its a creative repair. You should have done a step by step. Anyway, thanks for the info. I might have to be doing this repair soon.
+Benny Palma thank you for watching. I didn't want to make it a step by step because I don't want to be held accountable for what people do with their car. That's why I emphasized this is how "I" did it. Haha. Hope it helps you. Cheers
It is. Its a good way to go about the repair and works. That's why I think the tutorial would have been nice. I am always for increasing the knowledge base. Great work and thank you for your videos.
So I just checked my fuse. It's melted like yours was but it definitely got very hot. I'm sure it's damaged at that fuse block. I will test it more over the weekend. Now I can sleep tonight. Lol I do have video of mine on my channel if you'd like to check it out. It's a 2005 s55. I love these cars.
What size ring terminal did you use if u dont mind me asking?
Thanks for this video! Saved me lots of money! Those wheels really stand out, what are the details? (Size, brand etc.)
Glad i was able to help. These wheels are brabus monoblock III. 20 inch.
My brother has a 2000 S500 and he had the carpet shampoo got the car back all the Park lights brake lights reverse lights are on and you can't turn them off what do you think
It could be grounded. Lift the carpet out like i did on this video and make sure there's no water anywhere. Also, there's a fuse box under the chair of the passenger side rear seat which you can access from the kick panel of the seat. Make sure that's all dry. If they washed the engine as well, make sure the SAM unit is dry. Open up all the fuse block covers and let them dry. Basically, detailer used too much water and it created a ground. Hopefully you guys fix it. Cheers
love the barbs rims
Oh man....took me ages to find them rare monoblock 3s.
Peter Zafra some nice time my dad has the s430 clean same color with black rims and a s550 2008 these cars are good cars
They are. Just a tad bit of a pain the maintain. Cheers
I’m very interested to know if you attempted to make an updated phone charger in the armrest
Hi. I didn't. But, I can easily pick up a positive lead wire from under the carpet that I ran for the blower motor
Hi I have a 03 Mercedes Benz s500 my taillights not working sunroof not opening up it will not start could you please tell me what the problem is
Might need to get it re programmed at a shop. Usually happens when your battery drains out completely.
Thanks for going out of your way to make this video and help others. I have weird issue where my speed controller wire (which should be 0-6v as you said) is constantly fluctuating between 7-10v regardless of how high or low i have the ac (even if i have it off). I thought it was a bad control unit but $300 later and the new unit still has the same issue :(. Any idea if a bad ground wire somewhere along the line could cause this?
Make sure your main line going to the 40 amp fuse isn't bad or melter as this will cause fluctuating voltage since there's a breach in the wire from the fuse.
Awesome video exactly what I'm dealing with tha same on my 05 S430...
My question is on the fuse bypass and the connector capping... how did you complete that and how did you bypass the actual fuse plug ??? Thank you!
I tapped into the main battery line from the fuse block coming from the trunk into the passenger front. Then i used a 40 amp fuse to accommodate the power going into the regulator.
peter how is the blower on the S doing since the hot wire reroute with the in line 40 amp on the A/C regulator?
+Cary Colome it is working really well.
Thanks!!!!!
Ready for summer
Good job , this is basic work
Blower stopped working, will diagnose again using same steps. Is yours still working properly? I read another possible problem is bad ground wire? (the brown wire in plug assembly) I do have a tiny light bulb out on my climate control. the switch that controls up and down for temperature on passenger side is not lighting up anymore. Could this be a short or the cause? your fix worked great for a while but then we had a big snowstorm here. And it just didn't blow on a really cold day. Hasn't worked since. I check my reed valve regularly and also took out the footplate to verify there was no water damage. And was dry in both areas. The fuse still looks good. Any ideas?
Daniel Carey mine is working great. you might want to check the power and make sure it's live to the blower regulator. of that's good, unplug the blower from the regulator and put a volt meter to it and make sure that there's power coming out of the regulator to rule out the blower as an issue. if there's power then it might be the blower. if there's no power, it might be the regulator itself.
God job
Thank you
I did the by-pass wiring for the heater blower it works, did you have any problems with the new wiring after that, great video
Never had any problems. Still works very well today
I just found out i uave the same issue. I already bought a new blower and regulator and installed them. Im about to do this repair. Did you have to get all of the melted fuse out of the sam unit? I got out as much as possible but still a small piece is in there.
This is a game changer. I tried to get it all out buy as long as there's no chances of shorting, you are good. I still can't believe the quality of these sam units
Just want to know the kind (name)of wheels/rims you have on your car. I have just 2 of that rims and looking to buy 2 others to make it a set of 4.
20"
Zozovi Zozo Brabus mono block 3
Thx brother
Can you help me?? I have a wiring problem for my S class. The AC will shut on and off and the lights will also turn on and off. Sometimes when the ac stops working you also can’t roll down any windows. Do you know if it could just be a bad battery? The wires do look like they have cracks in the outer covering. Any advise would help!
Go through each fuse and make sure none of them are melted. It's a known issue with these benzes unfortunately.
@@PeterZafra Thank you! My step Dad is coming Friday to help me!
So I did exactly this like you did, only now maybe a week later I tried to turn off my ac and it stayed on even after turning the ignition off. Any ideas?
Okay. You might want to make sure that you didn't short out the wire on the regulator. The only thing I did on this video is run a whole new wire to the (all the time positive) line that goes to the regulator.
@@PeterZafra thank you that’s exactly what was happening all patched up now!
Thank you. Saved me hours of extra diagnostics. Worked for my 2005 s430.
Nice!!! Cheers!!!!!
Hey Peter,I have an 01 s500.I have had issues with my blower motor.In the junction fuse box my 60 amp bolt on fuse was blown.Also the the connector was burned from juction box to the passenger side sams unit.What do you think caused the fuse to blow and the connector to burn a pin out?Thanks for your help.
Hi. Yes. The wiring on these. Are weren't done well in my opinion. The regulators create so much resistance that it causes these wires and fuse connectors to melt and fail. That is why I made this video because the wiring simply wasn't good enough. I can't believe there was no recall for these terrible wiring. You might just have to reqire and run a thicker gauge wire yourself like what I did on this video. Until today, it still works very well for me.
@@PeterZafra Thanks Peter I will give it a shot.Do you have any recommendations on the wire set-up I could use or a link to one similar to what you used in the video?I appreciate your help.
Just go to ebay or Amazon and pick up an amp kit rated at least 8 yo 10 gauge and you will be fine. If you are rewiring a 60 amp, I would go thicker. 6 or 4 gauge.
@@PeterZafra Good morning Peter,when i am wiring from the junction box do I connect the ground wire as well r just the yellow and red wire.Thanks for all your help.
i had the same problem. for me it was corroded fuse. the one on the left of the 2 orange ones.also i dont have the one melted in your car. the orange on the right is the last fuse.nothing more beside it.
Poor design causes corrosion. Sad we get it from a high end company like mercedes
Peter, watched the video and I have a few questions. How long has it been since you did this repair? And how often have you driven your car since the repair? And have you experienced any other problems afterwards from this? Have you had to replace the new 40A fuse at all since installing? Thanks bro
Caleb Roberts did the repair September 21 2016. I drove at least 6k miles on it. Mileage isn't what matters. It's the amount of time used with A.C. on. Basically a minimum of 30 hours. Full blast etc. It held up. Never had to change the fuse ever since. Needless to say, it fixed my problem. Hope that helps. Cheers.
@PeterZafra can I use 8awg wire to perform this repair?
Hey, have you encountered a melted cluster fuse as well?
Have that happening, sent out the cluster for repair, they tell me its working fine..????
I haven't encountered that. What year is your car? I think some of these fuses aren't seated properly and from that it causes resistance which in turn create so much heat that it melts the fuse holder and fuse. It's just a poor design in my opinion. I hope you figure out the issue and not have to deal with it anymore. Cheers
Okay attempting this with my brother. what did you solder the live positive wire to?
Daniel Carey i soldered it to the red yellow wire that goes to the blower regulator.
hey man I did this without disconnecting the battery as well and the the blower motor is working great pretty much used everything you used. however now I'm getting in SRS and pre-safe unavailable in-dash. I looked it up and it's a common sensor problem in the passenger seat so it could just be the seat sensor acting up, however I figured it would be worth asking if you had any dash light problems after you performed this? I did have a person in the passenger seat. I would like to repeat my blower motor is working great maybe even better than before so thanks on that.
Daniel Carey hey Daniel. that was caused because you had a little body weight on the passenger side Chair while working on the blower area. turn off the car and without anyone on the chair start the car. the sensors need to reset itself because it was an uneven weight distribution and it's meant to work for child safety with children using car seats. hope it solves itself. I'm really glad you fixed your car. cheers!!!!
tried this and also electrical contact cleaner on seat belts. lights still on :( looking on benzworld now will keep you posted
Bro u think the cable #4 ga work? I have the same problem and my fuse is 80A? What u think
4 gauge will be really good.
@@PeterZafra and the 80A? Is good or not
Hey Peter are you located in the States? I could really use your expertise in helping me fix my ac blower issue with it working for a while then fan stops working. If it’s running and I turn the speed up, the fan will shut off. I have a w215 02 CL55 which is basically an S class coupe.
ThEDIPPA1 yes in the states. Check the fuse as this video states that issue. It could also be the blower regulator.
Peter Zafra ok, will do tomorrow and let you know what I see. Thanks my friend.
I notice your radio never came on ,when you turn your ingnition switch on are you having problems with your radio
It works well. It was just off.
Hey Peter I've gone through two regulators and on my third and second motor putting in the in line tomorrow, please tell me how long its lasted?
+Cary Colome It's going strong. The regulators aren't even heating up. Check your fuse. It might be causing resistance and causing the regulator to heat up. I have a feeling you have the same issue I had. Good luck.
I do for sure rerouting tomorrow, thanks for this tip, this is my 8 benz love them but every year has its own heating or A/C problem, do you have an easy way to get in the trunk of an 2000 S500 with a leaking vacuum in the trunk latch and no metal key fob?
+Cary Colome that I have no solution for. Let me know if you find one. Cheers
Cary Colome did it work for you?
Hello Peter, would you by any chance still have that spare regulator? If so would you be willing to sell it to me?
Sorry I don't. I already gave it away a while back. You can find it on eBay cheap. Just make sure it's the right part number. Refer to your original part number. Cheers
having the same exact problem with my 05 s500. after watching the whole video I feel like I could do this myself exactly how you did it. However what did you solder, I don't remember you talking about that in the video? Can we correspond through email?
Daniel Carey i soldered the live positive wire I added to the red/yellow wire that feeds the blower regulator. hope that helps.
Exactly... He said yellow with red... But when i zoom in i sow only the red wire... We need more explanation
Will blown fuses in this area cause the car not to crank/start and will it cause the gear lever to be stuck in park?
I wouldn't eliminate that issue but highly unlikely. I think that's more of a communication issue between the key fob and the ignition. Try cleaning your key fob. Sometimes lint gets in there and prevents the key from communicating with the ignition. I made a video of that as well. Best wishes. Cheers.
you need a gear shifter and a pre fuse i just went through this
actually the thing is called a pre fuse regulator it’s what’s regulates the current to the starter
It drops because it is an air conditioning system that changes resistance as you say to change blower speed
Mine has the same issue after 3 years does it still work well?
It still works very good. Cheers
Peter Zafra I just did mine a couple weeks ago works good thanks
Why did you say it was an 8 gauge wire in the beginning and then after you installed the wires they became 10 and 12 gauge?
I don't remember man. It's been a while but the wire i used for the 40 amp fuse is an 8.
I believe the wires i said that was 10 and 12 is the stock wire of mbz that my 8 meets at the connector.
Same exact thing happened to my 2006 but I went ahead and ordered a new fuse box. The electrical on these cars don’t hold up worth a shit.
Yes. It definitely doesn't. You would think right?
How long did it last for? And can you message me how. I don’t mind trying your way.
Also did you just use the ground from the fuse location?
It's August 27 2021 and it still works like a charm. No problems. No. I only re routed the positive. Not the ground.
@@PeterZafra can you draw me a diagram oh your style. I just wanna do it the right way. My fuse melted on 33
I try it?thanx
Good luck and cheers
Hey Peter mine got real hot any suggestions?
+kevin washington what got hot?
My Blower motor regulator but I realized turning it down it worked better
Somebody probably didn't take your car to the dealership to get it fixed when the recall is put out and they just continued about their day like it was nothing because the problem didn't show up to me go out and get a new fuse box off eBay or RockAuto parts and on that new part it will probably not have that problem because the new parts are post recall and are probably fixed of that issue
I heard the recall was for the 2000 model w220. Didn't get any for my year 2004. Either way, it's fixed. I'm positive my wiring will not melt. Cheers
Hi I am a female love Mercedes, but tired of the Stealer😁 I have a CL 500 and its is saying that my "Command Unit is not available" it did this for a while and I it started to work again..yeah!!, but after letting battery run low and getting a jump off its saying this again 😒 Do you have any input? I am wondering what state are you in? I loved to pay you if your local?
Thanks!😇
Hi. What happens when battery gets low is that computer needs to be reset to "wake up" the sensors and computer features to have command unit communicate again. I know its a pain and i also love mbz but sometimes i wish it was as easy as a Toyota. Haha. I'm in California amd if you are near enough, i would check it out for free just to help out. Cheers
So funny how Mercedes fuse box looks so trashy showing wires
Yup
ants Canada?
Your fuse box is not the issue it's the blower motor that's shorted. Fuses don't pop just because.
Ricardo Remodeling fyi...the fuse never blew. It melted. It was a recall on w220 from the early 2000 but it became an issue with 04 as well.
No recall again for these years I have a 03 and my fan stop working fuse look like your and after properly testing the blower motor I found out the motor was shorted
Peter Zafra The motor would still work but constantly blew the fuse intill I tested resistance and replaced it. I'm a pro Tech and I only telling you from experience.
+Ricardo Remodeling not in my case. You are right about the recall. But a lot of these years still had Sam unit issues. Sucks but what I did totally fixed my issues. The fan is great with no resistance. The issues from previous years was the drain from wiper area was getting clogged and was causing the water to drip to the fan causing corrosion and short. Glad you were able to fix yours. This definitely fixed my issue. Cheers.