2009 Mercedes-Benz C350 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2009 Mercedes-Benz C350

2009 Mercedes-Benz C350 Problems

Mildew in Heater Box

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.

Check Engine Light on Due to Failed Catalytic Converter

Catalytic converter failure is common and may cause a Check Engine Light to illuminate.

Replace air filter when replacing failed mass air flow sensor

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.

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2009 Mercedes-Benz C350 Questions

engine will not turn over. new battery. (1 answer)

engine will not turn over. new battery. (1 answer)

nothing happens when key is turned

Car wont start. When the key in ignition,I hear only click. (1 answer)

I did not use the car for 5 days. Just had my A service done 10 days ago. Today, it wont start. All internal and external lights go on, including radio when key is in ignition, but no sound from engine, only light click sound. This never happened before.
It still has the original battery (5.5 ye...

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2009 Mercedes-Benz C350 Recalls

Driver's Frontal Air Bag Inflator Ruptures And Sprays Metal Fragments

The driver's frontal air bag inflator may deploy the air bag with excessive pressure, resulting in the inflator rupturing and causing metal debris to be sprayed onto vehicle occupants. Dealers will replace the driver's frontal air bag module free of charge to resolve the concern.

Air Bags Unexpectedly Deploy Or Do Not Function When Needed

The air bag control unit may corrode and cause it to malfunction, resulting in air bags that deploy when not intended, or do not deploy at all in an accident. Dealers will inspect and replace the air bag control unit as needed free of charge to resolve the concern.

Tail Lights May Dim Or Fail

The tail lights of the vehicle may dim or fail because of a poor electrical ground connection. Dealers will replace the bulb holders if not previously updated and replace any corroded connectors free of charge to resolve the concern.

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2009 Mercedes-Benz C350 Reviews

I AGREE, Biggest trade off is with the tires. I finally got into some Michelin's that are GREAT! they were a tad bit more pricey, and they can be rotated from side-to side.. that is the best part. i'm able to get more wear from these tires than the ones that are recommended by the manufacturer.
Now 12500 miles since new. Great drive train with great acceleration and braking. Service A done to Mobil One at 1/2 of dealer's cost. Easy maintenance! Summer tires are great, but trade-off is thread wear--may last another 8K. Use Winter tires/rims--great for the past 2 stormy winters in Northeast.

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