2009 Mercedes-Benz C300 Service and Repair Manual

This factory service and repair manual for the 2009 Mercedes-Benz C300 applies to a sedan whose listed engine is a naturally aspirated 3.0L V6 with double overhead cams, able to take either flex-fuel or gasoline. The four-door body comes in six trims for 2009: three carry the 4Matic name (4Matic, 4Matic Luxury and 4Matic Sport), and three do not (Base, Luxury and Sport). Its procedures, specifications, torque values and wiring diagrams follow the V6 and the chassis and electrical systems of this car.

Engines covered

• 3.0L V6 — DOHC, naturally aspirated, flex-fuel or gasoline

Body styles covered

• 4-door sedan

Trims covered

• Base
• 4Matic
• 4Matic Luxury
• 4Matic Sport
• Luxury
• Sport

Known issues on the 2009 C300. Eight recalls on the federal record name the 2009 C300. Certain vehicles need a replacement driver's frontal air bag because the inflator could burst during deployment and throw metal pieces at occupants. Certain cars originally sold or ever registered in the Zone A states and territories receive a new passenger frontal air bag for a similar hazard. On certain other vehicles, control units were set up with the wrong software configuration during a service visit, which could cut drive power, reduce exterior lighting or disable stability and traction control. Of 571 owner complaints, 195 concern the electrical system, 177 air bags and 135 steering; 14 complaints reported a crash, 18 a fire and 11 an injury. Air bag diagnostics and wiring diagrams are covered.