C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

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Old Jun 4, 2023 | 10:58 PM
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Mercedes-Benz C350
Hi everyone

so i just bought a 2009 C350 4 matic and I did some fixing with it .
there is only one problem left >
the car is shaking (rough idle ) on N and on P and when I Reverse
the whole cabinet is shaking
but when I press on the gas the car become smooth (kinda)
there is no check engine light.

So my question is : what should I do and where is the problem?
Thank you.
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Old Jun 4, 2023 | 11:55 PM
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Odd Piggy's Avatar
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2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
There can still be trouble codes (DTCs) without a check engine light. An auto parts store will usually read codes for free if you don’t have a code reader or scanner.

The shaking could be from bad engine and transmission mounts on a car that old. There are no trouble codes for that.
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Old Jun 5, 2023 | 10:46 AM
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2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
Begin with transmission mount. If that does not solve your problem, then engine mounts.
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Old Jun 5, 2023 | 11:40 AM
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Mercedes-Benz C350
So is the motor mount effect the steering wheel also?
Cuz when i turn the steering wheel left or right the shaking get wors in the car especially in the cabinet
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