2011 Mercedes-Benz C350 Fuel system Problems

“My engine light jeep coming on with a p0456 code. Replace gas cap and purge valve control less then year ago. However I still smell gas when I fill up tank. After it goes down to 3/4 tank I don't smell gas. When it drop below half tank the engine light comes on. Same thing as last year now it starting again in june 2020. Only have 76000 miles. Dont drive thank much. Get service every year. They had recall for e350 back in 2013 however mb keep tell me its not my VIN. I think there is program with the C350 for 2011 model too. …”

“I had a fuel pump flange crack and leak fuel when tank was filled. Also, the check engine light threw codes relating to small leaks in the system and as such wouldn't pass state inspection. I had to get these fixed -- basically both sides (fuel pump/filter/sending unit) at the cost of almost $1,000 at a local shop. All VIN searches didn't show that my car was under recall for the fuel system, however I noticed that many other models in year 2011-2012 were under recall: see NHTSA campaign id #12v557000. I believe this model should be included in this recall.”

“Fuel leek under seat passenger side as well strong smell coming from everywhere when the gas thank is filled at the gas station.I called the mbusa for help with this problem and they refocused to help .this is been ungoing problem with the mercedes as I had same problem with my 2007 s550 as well my 2007 e350 .this time I'm extremely scared ,if this problem that I have with my car it's going to cause the health damage to me and my family , and every time I open my garage door in the morning I'm afraid the electrical light or motor would spark and ignite the fumes and cause the major explosion…”

“When fuel tank is about 75%-100% full, the car will smell heavily of gasoline inside and around the rear of the vehicle. Upon inspection, fuel pump cover/cap seems to be cracked and leaking fuel. Engine code p0456.”

“The contact owns a 2011 Mercedes-Benz C350. The contact stated that upon approaching the vehicle, he noticed a strong fuel odor. The contact stated as he entered the vehicle, he could still smell the strong gasoline odor. There was no warning light illuminated. The vehicle was taken to the dealer where it was diagnosed that the fuel pump assembly and the fuel filter needed to be replaced. The vehicle was not repaired. The contact referenced NHTSA Campaign Number: 12V557000 (Fuel System, Gasoline). The manufacturer was not notified of the failure. The failure mileage was approximately 52,861.”