2004 Mercedes-Benz C230 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2004 Mercedes-Benz C230
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2004 Mercedes-Benz C230 ProblemsCamshaft Adjuster Solenoid Failure
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.
Oil can leak into the engine wiring harness from the camshaft sensor. If the leaky sensor is not repaired, the oil can migrate through the wires and possibly damage the engine control unit. Have the sensor and harness checked regularly.
A dead battery can be caused by a faulty seat control module that does not properly shut down. Spilling liquids on the front seats can cause these modules to fail.
2004 Mercedes-Benz C230 QuestionsMy key only locked/unlocked the doors from passenger door or trunk. Now it will only do it from the trunk, but when I turn the key now to start the car, the key won't turn in the ignition switch. What the hell? (1 answer)
Some idiot has broken the knobs off the old unit so badly that new knobs will not repair the problem.
I have purchased a replacement module (used).
I need R&R instructions. This is a coupe.
Also have a Driver power door lock problem. Knob rattles and spins when pressing remote lock, but wi...
2004 Mercedes-Benz C230 RecallsOne or More Seat Belts May Not Lock as Designed
Some seat belt buckles may have a burr on a metal component of the locking mechanism. This could prevent the seat belt from locking under certain conditions. In the event of a crash, the seat occupant may not be properly restrained, increasing the risk of injury. Dealers will replace the affected seat belts. This recall is expected to begin on December 22, 2003. The Mercedes-Benz recall number is 2003 120006.