The heating, ventilation and AC (HVAC) heater box is susceptible to mildew buildup. This can result in a musty odor from the HVAC system, most noticeable when the system is first turned on.
Resources for the Repair and Maintenance of your Mercedes-Benz C350 4MATIC
Mercedes-Benz C350 4MATIC Models:
Mercedes-Benz C350 4MATIC Problems
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.
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The mass air flow sensor tends to fail causing poor fuel economy and Check Engine light illumination. The engine air filter should be replaced when the mass air flow sensor is replaced; a dirty filter can allow debris to damage the new sensor.
A vibration felt through the center floor of the vehicle can be caused by driveshaft flex discs, which crack and shred, causing excessive driveshaft movement. Not repairing these can cause damage to the driveshaft center support bearing, or, in the worst case scenario, damage to the transmission or differential.
Due to the size and material used on the brakes of these vehicles, the brakes may start to squeak around the 50 percent wear point. The brake rotor surfaces become uneven, causing a lip to form at the outer edge of the rotor. Because of this, the rotors are usually replaced when the pads are worn (pad life varies depending on driving style and terrain).
Mercedes-Benz C350 4MATIC Questions and Answers
Whenever the car is shifted from park to reverse there's a noticably long delay before the transmission engages. Then I feel a "thud" and the car moves in reverse. This occurs whethe...
After the car warms up you can smell (hot) from the drivers door back to the end of the car. All fluid levels are up, no flashing code or engine lights. Car still runs fine but you do have the hot ...
Mercedes-Benz C350 4MATIC Reviews
I have owned it for about 8 months now, bought it with 20,500 miles and it now has 35,000. No problems yet, just some steering noise that I will have checked out.
Ride, performance, and quality have been great so far!