general problems of the 2012 Mercedes Benz C300

Six problems related to other fuel system have been reported for the 2012 Mercedes Benz C300. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Mercedes Benz C300 based on all problems reported for the 2012 C300.

1 Other Fuel System problem

Failure Date: 04/26/2026

Vehicle: 2012 mercedes-benz C300 4matic sport problem component: fuel / propulsion system safety issue description: my 2012 mercedes-benz C300 developed a serious fuel tank leak at approximately 106,460 miles which created overwhelming gasoline fumes and rendered the vehicle unsafe to operate. The gasoline fumes were extremely strong and entered the passenger area. The fumes were severe enough that I became physically overwhelmed from the gasoline exposure and discarded clothing due to gasoline contamination and odor. A local repair facility identified the leaking fuel tank. I was informed the replacement fuel tank was allegedly on extended backorder through mercedes-benz channels. Because the vehicle was unsafe to drive and replacement parts were allegedly unavailable for several months, I was forced to tow the vehicle from [xxx] to [xxx] at my own expense in order to locate a repair facility that could obtain a replacement fuel tank and safely repair the vehicle. The repair invoice states: “installed used lt fuel tank incl switchover fuel pumps replace section of steel fuel line front of tank from lower braided line. ” I am submitting this complaint due serious gasoline leak safety concerns, severe gasoline fume exposure, potential fire hazard, and the alleged extended unavailability of replacement fuel tanks. Mercedes-benz USA case number: 22302114 information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

2 Other Fuel System problem

Failure Date: 10/02/2022

My mercedes 2012 c 300 is leaking gas which may lead to fire ( the fuel filter flange when operated in high temperatures.

3 Other Fuel System problem

Failure Date: 10/01/2022

Car is leaking gas very dangers . I contact mercedes dealer regarding the recall on this type of mercedes I have and they said only vehicles manufactured from April 18, 2011, through July 12, 2011. Mine was before or after , and they refuse to give me the exactly date for my car manufacturer. Car I use for uber , and I don’t have any other income . If someone just through away a cigarette in parking lot might cause a big problem in the building and others cars in parking.

4 Other Fuel System problem

Failure Date: 07/15/2022

My car smell like a gas leak. I had went to a car shop to have the car to looked at. The mechanic had told me that the fuel filter flange is leaking gas.

5 Other Fuel System problem

Failure Date: 04/19/2022

The rear k frame on Mercedes Benz C300 totaly rusted through and broke apart causing the entire rear of vehicle to rest upon the fuel tank. The failure also caused stress on rear brake lines. The vehicle is 10 years old with 90,000 miles purchased brand new and garaged. Mercedes has performed a recall on canada vehicles but no USA vehicles. This is total negligence. This is going to cause a fatality. Either a vehicle will catch fire or brake lines will fail and cause an accident. The vehicle is known by the dealers to have this damage/failure. I googled and found numerous cases. Mercedes was not willing to stand by the vehicle and repair. This should be a recall like it is in canada. I was quoted $5000. 00 to repair by mercedes.

6 Other Fuel System problem

Failure Date: 09/02/2021

The rear drivers side had a loud chunking/clanking noise while driving and the vehicle was unable to control and break when in motion. Driving was impossible as the breaking component was a total failure and car could not be controlled while traveling down 45-50mph zone. I reduced my speed to 20-25 mph by letting off on the gas to get better control of the car if breaking would need to be suddenly made. I relied on the shoulder to pull off if any sudden breaking was needed. The car was immediately take to be reviewed by a specialized Mercedes Benz mechanic and further inspection proved that the rear subframe on the driver’s (left) side was corroded and broken. The connecting arms are rusted, corroded and rendered the car inoperative. I notified my insurance company as well as car manufacturers corporate office. I researched this issue further and discovered that this reoccurring issue with this make and model. There are a pheletera of recounting of this same issue on various message boards to validate the same issues and callouts I found. The car was taken to the dealership that it was purchased and further inspection showed that the left side subframe/ subframe arms were corroded with rust and broken. The brake lines and fuel tank were equally rusted and corroded. The service manager confirmed that this is defect of the car but it had been part of a recall. I had the car towed for 2nd opinion to another dealership service department to access the car and this callout further validated the corrosion and rust was wide spread and has rendered the car inoperable unless these damages were fixed.


Other Other Fuel System related problems of the 2012 Mercedes Benz C300



C300 Service Bulletins
C300 Safety Recalls
C300 Defect Investigations