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MeyerDieter

Mercedes X Class 2020: Engine failures, starting problems and error messages - exchange of experience and solutions wanted

Fault stored

Engine shuts off by itself

Check engine light on

Car won't start

Hi everyone, I'm currently struggling with my 2020 diesel Mercedes X Class (almost 100,000km on the clock already!), and I'm really frustrated. The check engine light is constantly on, the engine sometimes just cuts out and sometimes the car won't start. According to the diagnostics there is a memory error and something about "coding faulty". Has anyone ever had similar problems and can tell me how they were solved? Have you also had a bad experience at the mechanic and how did you deal with it? Any tips? Thanks in advance!

(Translated from German)

5 comment(s)


HartmannRacer

Hi, I recently had this problem with my 2017 gasoline Mercedes X Class. Seems like it's a common problem with these models. The fault for me was also in the engine control unit. After some testing and careful investigation, the mechanic at my garage determined that the ECU was faulty. He had to replace it completely. Unfortunately, this is a serious matter because the engine control unit plays a central role in the proper functioning of the engine and the car. After the replacement, my car ran perfectly again, so if you're facing this too, don't be discouraged. It sounds like a huge job, but once it's fixed, your car should run normally again. Hope this helps you.

(Translated from German)

MeyerDieter (Author)

Hi, thanks for sharing your story with me. It's reassuring to hear that you were able to successfully fix the same problem, even though replacing the engine control unit is no small matter. May I ask what you paid for it? And have you had any other problems with the car since then? Thank you in advance!

(Translated from German)

HartmannRacer

Hi, I'm glad that my experience has helped you. I had to pay around €1000 to replace the engine control unit. It was quite a blow, but since then my car has been in great shape again. No further problems since the replacement. And to answer your other question: the "coding fault" was also fixed when the mechanic tackled the problem with the engine control unit. Sometimes several faults are linked together. Good luck with your car!

(Translated from German)

MeyerDieter (Author)

Hey, thank you very much for your information! Sure, 1000€ is a lot of wood, but as you say, if everything runs smoothly again afterwards, it's worth it. I think I'll call my mechanic tomorrow and take this step. I definitely feel better prepared now and less stressed thanks to you. I hope I'm as lucky as you and don't have any more problems afterwards. Thanks again for your help! Have a great day!

(Translated from German)

dave95

Hey, maybe you can tell us briefly what the cause of your error was. I would be interested!

(Translated from German)

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