Mercedes C200 2009 – Rough Idle, Shaking & Power Loss Issues
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C200
Mercedes C200 2009 – Rough Idle, Shaking & Power Loss Issues
Hello everyone,
I own a Mercedes C200 2009 (W204) and recently experienced some strange symptoms that I’d like your help with.
Here’s what happened:
Has anyone experienced something similar? Could this be related to the MAF sensor, throttle body, transmission, or engine mounts? Any guidance or advice would be really appreciated before I start throwing parts at it.
I own a Mercedes C200 2009 (W204) and recently experienced some strange symptoms that I’d like your help with.
Here’s what happened:
- While driving, the car was running perfectly fine. I stopped at a red light and, once it turned green, I started to accelerate. Suddenly, I felt a huge jerk with a sudden drop in RPM (felt like a loss of power). After that moment, the car drove fine again until I reached the next stop.
- When I stopped at the next light, the car started shaking badly while in gear (D).
- If I shift to Neutral (N), the RPM rises to about 1.5k, then drops back down.
- When shifting back into gear, there’s a loud noise and strong shaking.
- The car stalled once, but since then it hasn’t stalled again. Still, the shaking at idle in gear continues.
- While driving above idle RPM, the car is completely fine — smooth, no shaking at all.
- I also noticed that in Comfort mode, the car has very poor acceleration — I really have to press and hold the pedal until it slowly picks up power. But in Sport mode, it drives much better.
Has anyone experienced something similar? Could this be related to the MAF sensor, throttle body, transmission, or engine mounts? Any guidance or advice would be really appreciated before I start throwing parts at it.
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From: MA Coast
W204 2010 C300 4matic Sport M272
First thing that should be done is to scan for fault codes using a Mercedes specific obd scanner. This will save time and money trying to guess what the problem is.
Also post which engine you have.
Also post which engine you have.
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C200
I have a M271 Supercharger engine, I did computer scan and i got code "The Boost pressure deviates from the specified value"
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From: MA Coast
W204 2010 C300 4matic Sport M272
What scanner are you using? I ask because if its generic not all the fault codes may be showing.
What was the specific code #?
Have you inspected all the hoses and lines? May have an air leak somewhere.
What was the specific code #?
Have you inspected all the hoses and lines? May have an air leak somewhere.
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C200
I got it checked by mechanic and they told me i need to replace the MAF sensor because it has become faulty but i still doubt if the issue of the car is due to the MAF sensor or it's related to the transmission
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2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
Was the problem description “Boost Pressure Deviates From Specific Value?” Suggested solutions include MAF sensor, throttle position sensor, accelerator pedal control. Probably none of those. Look for loose bolts or failed gaskets from turbo output side all the way to the engine, including waste gate and intercooler connections.
It might help to see boost values in real time as ‘deviates” doesn’t tell the whole story. It’s a bit unusual to get 3539 by itself and not associated with another code.
It might help to see boost values in real time as ‘deviates” doesn’t tell the whole story. It’s a bit unusual to get 3539 by itself and not associated with another code.
