Mercedes C class W204 - Problems and malfunctions
What are the most common problems and failures of the Mercedes C Class W204 and how to solve them?
Mercedes C class W204 - All models with gear code 722.9, 2009 →.
Issue - Late shift to reverse gear. Difficulty activating the transmission when reverse gear is selected.
Cause - Transmission Control Module (TCM) software error.
Repair - Perform component, electronics, and mechanical tests (as needed) to eliminate other possible causes. If no error is found: Reprogram the transmission control module (TCM) with the upgraded software. Adjust the TCM by driving a few miles in different road conditions.
Mercedes C class W204 - All models with transmission code 716.
Issue - Difficult to choose 1st gear and reverse gear. Difficulty shifting gears when shifting into a higher gear from 1st to 2nd gear.
Cause - No speed selector cable set. Clutch center plate blocked on transmission input shaft.
Repair - Check and adjust the speed selector cable. If gear selector cable setting is correct: Remove transmission. Clean and lubricate the transmission input shaft grooves.
Mercedes C class W204 - All models.
Issue - Whimper / friction from tailgate hinge.
Cause - Insufficient lubrication of the boot lid brake mechanism.
Repair - Lubricate the boot lid brake mechanism.
Mercedes C class W204 - All models.
Issue - Xenon headlights don't work. Stored error codes.
Cause - Moisture / corrosion on the xenon headlamp multi-connector.
Repair - Check for corrosion on the xenon headlamp multi-connector. Replace the components, if necessary.
Mercedes C class W204 - All models with engine codes 272/273.
Issue - A whimpering / grinding sound from the front of the engine.
Cause - Auxiliary Drive Belt Guide Belt Defective.
Repair - Remove the auxiliary drive belt. Start the engine. If no more noise is heard, stop the engine. Install a new auxiliary drive belt pulley.
Mercedes C class W204 - All models with engine code 272.
Issue - Engine Malfunction Indicator (MIL) illuminates. Stored error codes: P0059, P0060, P0063, P0064, P0271, P0272, P0275, P0276.
Cause - Camshaft Position Actuator (s) (CMP) Defective (s).
Repair - Install the new Camshaft Position (CMP) Actuator (s).
Mercedes C class W204 - All models with engine code 272.
Issue - Camshaft Position Actuator (CMP) Oil Leaks.
Cause - Defective Camshaft Position Actuator (CMP) Oil Seal.
Repair - Place a new oil ring seal on the camshaft position (CMP) actuator.
Source: autoportal.hr
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