How to Test a Mercedes Alternator

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www.youcanic.c... This video provides Mercedes-Benz owners with a comprehensive guide on how to test their vehicle's alternator. The presenter offers step-by-step instructions on how to use a voltmeter or multimeter to test the alternator's output voltage, as well as how to interpret the results of the test. The video also covers common signs that may indicate a malfunctioning alternator, such as warning lights on the dashboard or issues with the vehicle's electrical system. Additionally, the presenter provides tips on troubleshooting potential issues with the alternator and how to replace it if necessary. Overall, the video serves as an invaluable resource for Mercedes-Benz owners seeking to maintain optimal vehicle performance and avoid potential issues caused by a malfunctioning alternator.-
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[@programmernatambay4569]

Nice and concise instructions. Thanks for the video.

[@mantolaman]

Very clear and easy to follow! Thanks!

[@d.l4055]

Good Demonstration. Sound approach

[@SM_TheTraveller]

Hi I have a w204 2010 will the same apply ? Thanks

[@user-ut8zq8ie1w]

I have c63 2010 new battery and fairly new alternator. Alternator is not charging battery. Not sure if its the ECU or voltage regulator..

[@ibrahimantondalo9184]

Good job

[@chrisledger1094]

What would be the cause of an alternator putting out voltage but no amperage? Would the voltage regulator be the culprit for that? I’ve never came across this before. It’s an 08 CL550

[@georgebushisntcool]

Did you diagnose it with scanner. I have same car and same symptoms and whining from the alternator

[@chrisledger1094]

@@georgebushisntcool I narrowed it down to being the voltage regulator as they’re notorious for going bad on many models and years. I bought a new one to replace but wound up stripped the screws attaching it cause they were seized. I gave up and put a new alternator in and everything is better than it was before. Got a new one off Amazon for $175

[@georgebushisntcool]

@@chrisledger1094 thanks for the feedback man, did yours whine as well

[@Slacksfifth]

​@chrisledger1094 would the same alternator work in an 2013 e350

[@loveyou2205]

I have w203 model 2005...it gives 13.6 13.5 and sometime when i accelerate it get down to 12.9 13.0 then it goes to 13.7 14.2... But the lights get week when i close the windows when the engine is on.. So i don't know where is the problem?

[@Hondalife_8]

Did you figure it out??

[@corneliusd3688]

Assuming you connected the volt meter to the battery, right?

[@YOUCANIC]

Indeed, the volt meter was connected to the battery. At YOUCANIC, we're dedicated to empowering car owners in diagnosing and repairing vehicles confidently. Our YOUCANIC Full System Scanner can help you understand your car's issues comprehensively. Find out more here: www.youcanic.com/scanner
Our portal also offers OEM Factory Repair Manuals for further support. If you have more queries or need additional assistance, feel free to ask on our platform. We're committed to making car repairs understandable for all. Explore our website here: www.youcanic.com/

[@5000RR]

My 350cdi didnt wanna start this morning,hooked it up to a charger and after 5 min it started,gives me control module codes and injector codes

[@YOUCANIC]

Thanks for reaching out! Sounds like you're dealing with some tricky issues. At Youcanic, we’re here to help with free guides, resources, and our YOUCANIC scanner to make your car maintenance easier. Please visit www.youcanic.com to explore these resources or obtain any additional assistance.
Feel assured knowing we also offer access to factory repair manuals for more detailed information. Our goal is to give you the confidence and know-how you need to tackle your car issues head-on! We're here to support you throughout your car ownership journey.

[@5000RR]

@@YOUCANICother owners are tellig me it should read over 14v,is that true for a diesel?

[@mymechanicfriend6017]

Good Shiiit mane🖖🏾✊🏾