dominikkoch6

Mercedes CLK diesel MAF sensor issue

My 2004 Mercedes CLK diesel has a problem It has 77650 km and is showing signs of a bad mass air flow meter LMM including high fuel use, stalling when idling, a check engine light, and smoke when accelerating. I think it's the MAF sensor. Any ideas before I see a mechanic?

4 comment(s)

Sounds like a textbook MAF sensor failure. I had similar issues on my CLK. Check engine light, poor fuel economy... the works. Did you check the air filter and air intake? Debris can sometimes mess with the MAF readings.

I appreciate your quick reply. Can you tell me more about how you checked the air filter and air intake, or any diagnostic steps you found helpful in finding the problem?

I didn't do anything fancy. I looked at the air filter to see if it was really dirty and checked the air intake for anything blocking it. When the symptoms match that closely I usually just replace the MAF. I'd suggest taking it to a good shop to be sure.

Thanks for your help. I spoke to a mechanic, and they said the MAF sensor was bad. Replacing it fixed the problems, and it cost 365€. The car is running like it should now.

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