2009 Mercedes Benz C300: engine overheating

6 of the 576 complaints about the 2009 Mercedes Benz C300 describe engine overheating.

owner complaints: 6
of this car's complaints: 1%
typical mileage: 61,999
recalls: 0

Is there a fix? 7 service bulletins cover this area of the car. See below

Engine overheating by model year

2009
6
2008
6

What owners say

Filed Jun 6, 2014 · Electrical, Lights · 61,999 miles · NY

Prior to pulling into my garage, I smelled burning electrical wiring. All warning lights on the dash panel for the left rear lights came on. I opened the trunk to see if a light bulb burned out, and smelled the burning wires. Opening the panel covering the left rear lights, I saw a burn through scorched circuit board. On closer examination, I noticed the ground wire was thin and the cause of the severally overheated and partially melted area on the left rear lamp assembly. Since then, the mercedes dealer replaced the circuit at my expense. About six months ago, the same thing happened on the right rear tail light assembly. It was also a thin ground wire that had overheated and partially melted the circuit board.

Filed Apr 15, 2014 · Electrical, Lights · 33,000 miles · WA

Right rear taillight pig tail overheated and shorted out lamp holder. You can see the burn marks where it was too hot. Has to be replaced.

Filed Apr 9, 2014 · Electrical, Lights · VA

Components of the tail light assembly on the driver and passenger sides have overheated and rendered the units inoperative. As a result, the tail lights no longer work. This seems to be a known issue and common occurrence in aging assemblies of this type.

Filed Jan 8, 2014 · Lights · 74,000 miles · AL · fire

Tl* the contact owns a 2009 mercedes benz c300. The contact stated that the front driver's side headlight, rear driver's side brake light and the turn signals failed. The local mechanic replaced the bulb however the wires overheated and melted, causing the light bulb and assembly to become damaged. The vehicle was not repaired. The failure mileage was 74,000 and the current mileage was 93,505.

Filed Jun 4, 2013 · Electrical, Lights · 36,089 miles · GA

While highway driving the right tail lamp, brake lamp, fog lamp dashboard warning light illuminated. Upon inspection, the ground wire insulation and connector on the taillight assembly had melted from overheating. We experienced a total loss of all lighting on the right rear taillight assembly.

Filed Oct 12, 2012 · Electrical, Lights · 70,000 miles · NY

At some point in time the left rear taillight started to dim dramatically. I opened the enclosure to change the bulbs thinking they were burnt out and found the wire harness as well as the bulb dock had melted because of overheating. A fuse did not blow and the cars computer never gave any indication of this issue. My concern is that the system could actually catch on fire and it is in the trunk and not far from the gas tank. After researching on mb world this appears to be a known problem and flaw. I think it should be looked into and determine if there is a greater issue here. *tr....updated 03/27/13 *bf updated 04/03/2013