I had this issue around 62000 miles. The transmission of the car fails to shift intermittently and the only way to get it shifting properly again is to park the car and restart the engine. The reason for this failure is because of certain transmission parts failing to get lubricated properly or are dirty. This also suggests that the transmission filter is getting clogged up. While Mercedes said these were "sealed for life" transmissions, they ...
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Newest reported Mercedes-Benz C230 problems
722.9 Transmission gets stuck in gear when it downshifts/hard shifting of transmission from 1st to 2nd.
A tube for the EGR system tends to clog with carbon buildup.
A refrigerant leak may develop from one or more of the following AC components: AC compressor, hose manifold for the compressor, or the evaporator core. The loss of refrigerant can cause poor AC performance. Our technicians tell us that proper leak diagnoses should be performed in order to determine the cause of any refrigerant loss.
automatic transmission failure. Metal in filings in pan
The camshaft adjuster solenoid (which is related to the variable valve timing system) may fail or timing chain/balance shaft components may wear, resulting in illumination of the Check Engine Light and various drivability issues. Mercedes-Benz has released a service bulletin outlining specific repair instructions depending on fault codes stored.
The crankshaft position sensor may fail. Symptoms of this are: The engine will crank—but not start—especially when the engine is warm. The car may start again if it is left to cool off, but it may run roughly or have poor performance. Communicating these specific symptoms to your technician can save diagnostic time.
The interior wood trim and dash pad are likely to crack due to age and sun exposure.
The engine crank case vent hoses may fail, resulting in a rough running engine and/or poor engine performance. Damaged hoses should be replaced.
Valve guides tend to wear in higher mileage cars, which causes compression loss in the engine. This leads to a loss in fuel economy or performance. Replacing the guides, which requires cylinder head removal, may solve the problem or a new cylinder head may be needed.
Irregular and premature tire wear can be caused by the lower control arm bushings cracking, resulting excessive movement at the control arm pivot point. Ball joints can also wear out prematurely, causing similar tire wear symptoms. I some cases it may be necessary to replace the lower control arm, including bushings & ball joint to correct this concern.
Irregular and premature tire wear can be caused by the front thrust link bushings cracking and causing excessive movement in the suspension. The thrust link bushings are fluid-filled (to help reduce vibration), so if they crack, they will leak oil.