Clean and lubricate the transmission input shaft grooves. If the speed selector cable setting is correct: Remove the transmission assembly. REPAIR - Check and adjust the speed selector cable. ![]() Central clutch plate blocked on transmission input shaft. Difficult shifting from 1st to 2nd gear.ĬAUSE - The speed selector cable is not set up properly. PROBLEM - Difficult to select 1st gear and reverse gear. Mercedes C class - MODELS WITH TRANSMISSION CODE 716 Drain and fill the transmission with a reduced amount of oil. REPAIR - Reduce the amount of oil by 300 ml. PROBLEM - Difficult to shift from first to second gear when it is cold. Mercedes C class - MODELS WITH MANUAL GEARBOX REPAIR - Install new balance bar tie rods. PROBLEM - Tapping from the front suspension on uneven surfaces.ĬAUSE - Wear of the connecting rod balance bar. Mercedes C-Class - MODELS WITH STANDARD SUSPENSION SINCE 2003 REPAIR - Remove the valve body and inspect. All air pipes are installed correctly and do not leak. Whistling from the body space of the valve. REPAIR - Perform a compression or leak test before removing the cylinder head. Loss of compression on one cylinder.ĬAUSE - Exhaust blown valves due to defective cylinder head. PROBLEM - The engine is difficult to start and shut down. Install a new alternator pulley if necessary. Deactivate the alternator pulley coupling. Turn the alternator pulley by hand counterclockwise. Check that the alternator pulley works without problems: Turn the alternator pulley clockwise by hand. REPAIR - Remove the auxiliary drive belt. Loud noise from the auxiliary drive belt. Mercedes C class - MODELS WITH ENGINE CODE 271 REPAIR - Install the new relays to the positions in the fuse box / relay board in the engine compartment. 'Brake lamp fault' is displayed on the instrument panel.ĬAUSE - Relay fault in fuse box / relay board in engine compartment. ![]() PROBLEM - The engine does not start, the front wipers do not work. REPAIR - Check the xenon headlight connector for corrosion. REPAIR - Lubricate the boot lid brake mechanism.ĬAUSE - Moisture / corrosion at the xenon headlight connector. ![]() PROBLEM - Squeaking / friction from the boot lid hinge.ĬAUSE - Insufficient lubrication of the boot lid brake mechanism. After repair, check that the brake pressure sensor electrical installation is correct. The multi-connector and connectors must be dry before connecting them. Repair the control module multi-connector connectors ABS/ ESP 18, 19 and 20 using repair equipment and solder joint. PROBLEM - Control indicator illuminates ABS/ ESP.ĬAUSE - Corrosion at the control module multi-connector connectors ABS/ ESP 18, 19 and 20. Remove the sockets and permanently connect the wires using the thermal connectors. ![]() Locate the rear side airbag electrical wiring connections under the left / right rear door sill trim. REPAIR - Locate the front side airbag electrical wiring connections behind the left / right trim in the footwell. PROBLEM - The airbag control indicator illuminates.ĬAUSE - High resistance at the front / rear side airbag assembly connections. Check that the front suspension lower torsion arm ball is worn and replace if necessary. Inspect for worn or damaged front suspension lower torsion arm bracket and replace if necessary. Replace the upper support plate if necessary. REPAIR - Check that the distance between the upper front shock absorber bracket and the upper support plate is 2 mm. Worn balls of the lower torsion arm of the front suspension. Worn or damaged inner suspension of the lower torsion arm of the front suspension. PROBLEM - Punching from the front suspension when driving on bad roads or over lying cops.ĬAUSE - Insufficient distance between the upper front shock absorber bracket and the upper support plate. Mercedes C Class What are the most common problems and failures of the Mercedes C Class and how to solve them?
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