2016 Mercedes-Benz C300 fuel system problems

Filed Oct 27, 2026 · Engine, Fuel system · OH

Hi, in the Fall of 2025 my 2016 Mercedes Benz C300 4 Matic, started giving off smelly fumes while my car was idling/ warming up. I registered a complaint with the Corporate Mercedes Benz Office USA, LLC in April 2026 @ 800‑367‑6372, after the dealership would not correct the issue free of charge. 1. Hose Clamp Replacement problems. 2. The raw fuel leakage produces strong gasoline odors inside the cabin- via the air filter, risk of car stalling and the smell could be leathal. 3. The problem was confirmed in a lawsuit. 4. The dealership would not repair the issue. 5. There were no warning lamps or messages on the dash board, the only essential issue were the smells, fumes, odors and lawsuit.

Filed Apr 27, 2026 · Electrical, Fuel system · CA

I’ve been driving my car since September when it was purchased I just got it from dealership 4/9/26 spent over $1100 and have been working like regular full time schedule, I wake up today 4/27/26 trying to work and car is stalling. Not sure what’s going on with these mechanics and technicians. I pay to dollar to ensure my family safety on the road here I am stuck without support due to my circumstances. Also, my car just idles the shuts off doesn’t turn mall the way on, magically a check engine light flashed then car just immediately stalled and won’t turn back over all the way.

Filed Feb 9, 2026 · Fuel system · NY

Strong fuel smell in cabin Can maybe cause a fire

Filed Jan 29, 2026 · Engine, Fuel system · GA

fuel lines/ clamps defective causing a fuel leak. vehicle could catch on fire and fumes are extremely strong inside the cabin. issue confirmed by Mercedes dealer, mentioned there is an extended warranty up to 120,000 miles. rejected mine because i was at 120,300 miles. had to pay out of pocket. no warning lights or anything just the really strong smell of fuel and fuel range dropping. this is a very common issue thats known and should be a recall.

Filed Jan 2, 2026 · Fuel system · 60,000 miles · TX

The contact owns a 2016 Mercedes-Benz C300. The contact stated that whenever the fuel tank was full, there was a fuel-burning odor coming from the engine and entered the vehicle through the A/C vents. In addition, when the vehicle was cold, the odor was entering the vehicle through the A/C vents. No warning lights were illuminated. The vehicle was taken to a collision center specializing in foreign vehicles, where it was diagnosed that the fuel rail and injectors had a fuel leak. The vehicle was not repaired. The contact stated that the failure persisted. Upon further investigation, the contact related the failure to the federal safety agency Campaign Number: 21V961000 (FUEL SYSTEM, GASOLINE). However, the VIN was not included. The contact stated that his mother owned the vehicle in the past and gave the vehicle to the contact two years ago. The contact's mother remembered receiving a recall letter; however, the contact's mother was unsure if the vehicle had been repaired in the past. The manufacturer was made aware of the failure and referred the contact to the NHSTA Hotline for assistance. The failure mileage was approximately 60,000.

Filed Dec 9, 2025 · Fuel system · VA

An independent service center diagnosed my car as having a fuel leak stemming from the fuel rail and fuel injectors. This is a fire hazard due to a gas leak. There is a gas smell in the interior cabin that I noticed approximately one month ago. I believe this pertains to the federal safety agency ID #21V961, and I would like the federal safety agency to consider including my VIN in this recall.

Filed Dec 5, 2025 · Fuel system · OH

My 2016 Mercedes Benz C300 started giving off funky fumes last year in 2024, now the fumes have turned into the smell of gas in 2025. Everytime that I call the dealership on Rockside Rd./ Broadway, located in Bedford Ohio, they give me an excuse as to why it's not their responsibility to correct the issue. What can I do?

Filed Nov 13, 2025 · Fuel system · MI

It's ridiculous I took my car to the dealer (mercedes-benz of novi, mi) yesterday 2016 mercedes c300 4matic for extended warranty on low pressure fuel hose as the car cabin smells like gas fumes to the point where it got me dizzy and nauseous and threw me in bed for a day. When I arrived there I was told yeah this is common on these cars and warranty will take care of it. Got a call later saying it will not be covered as the 10 year extended warranty surpassed my car as my car production date is 09/15, I was like please its only a couple month after and its a fire hazardous and health matter they were like no, now my car is there and I have to pay them $850 to change an issue that was supposed to be taken care from the beginning from the manufacturer.

Filed Nov 12, 2025 · Fuel system · 98,000 miles · NV

The contact owns a 2016 Mercedes-Benz C300. The contact stated that there was a gasoline odor inside and outside the vehicle on several occasions, while driving at various speeds and while parked. The contact stated that the vehicle failed to accelerate as needed. The contact stated that there was no warning light illuminated, the fuel consumption increased, with the fuel gauge lowered more quickly. The vehicle was taken to an independent mechanic who saw gasoline pooling near the fuel injector, and the coils were leaking between the fuel injector and the fuel rail, and the fuel rail or possibly the injector seals needed to be replaced. The vehicle was not repaired. The contact believed that the vehicle should be included in a recall. The manufacturer was notified of the failure. The failure mileage was approximately 98,000.

Filed Oct 22, 2025 · Fuel system · MA

The contact owns a 2016 Mercedes-Benz C300. The contact stated that while driving at an undisclosed speed, the contact smelled a gasoline odor in the interior of the vehicle. No warning lights were illuminated. The vehicle was taken to the dealer, who determined that the fuel hose downstream of the fuel pump was leaking. The vehicle was not repaired. After investigating the failure, the contact related the failure to the federal safety agency Campaign Number: 18V837000 (Fuel System, Gasoline); but the VIN was not included. The manufacturer was notified of the failure but provided no assistance. The failure mileage was unknown.