There was an odor of fuel inside the cabin. The vehicle was taken to an independent mechanic, and the technician informed me that there was an strong odor of fuel when he lifted the hood and advised the contact to take the vehicle to a Mercedes dealer because he was not certified to service the vehicle.

- Anna, TX, USA

I purchased my mb C300 used certified and had noticed a fuel smell. I spoke to the dealership and they said it was normal with mb and nothing to be concerned with. I have now had the car for about 5 months and took it to my local mb dealership to find out what is going on with the smell and they said it was a known issue with this make model and year and it is nothing that will cause harm.well it is now cold outside and the more I use my heat the more the smell comes.I can literally smell gas in my house from the car just being (not on or running) in my attached garage. This is definitely a health issue because I feel like I may pass out if I stay too long in the car with the heat on. Something needs to be done about this besides being told it's a known issue. If its widely known why has there not been a recall on it yet. I also do not understand why my warranty /extended warranty does not apply to this

- Kansas City, KS, USA

There is a very strong gas smell when the heat and/or defroster is turned on. The higher the heat is turned up'the higher the gas smells. The smell lingers when the car is not running/cut-off. I have noticed that the strong smell of gas does not occur when the air is turned on'it only smells when the heat is turned on. It is so strong'it would literally knock you out.

- Dallas, TX, USA

The contact owns a 2016 Mercedes Benz C300. The contact stated upon entering the vehicle, there was an abnormal fuel odor in the cabin of the vehicle. The vehicle was taken to park place motorcars Mercedes-Benz grapevine located at (1300 texan trail, grapevine, tx 76051) to be diagnosed. The contact was informed that the high-pressure fuel lines needed to be replaced. The vehicle was not repaired. The vehicle was not covered under warranty. The manufacturer was not notified of the failure. The approximate failure mileage was 17,000.

- Duncanville, TX, USA

The car has a strong gas smell inside the cabin after first start cold, and also ssecond cold start. The passenger air bag on message constantly comes on.

- Chesterfield, VA, USA

Fuel line leak, smells like gasoline when heater is turned on.

- Gilbert, AZ, USA

Hose clamps attaching the high pressure fuel line leading from the firewall-mounted fuel pump to the central fuel rail failed to maintain a tight connection. This leads to fuel leaking past the hose clamp connection into the open engine compartment during cold weather (sub-40 degrees Fahrenheit) while the engine is running. When the ambient temperature in the engine compartment rises, either by environment or by heat generated from the engine, the fuel leak subsides. Symptoms when this occurs are a very strong fuel smell in the passenger compartment and also, upon further inspection, observation of liquid fuel pooling on the top side of the engine compartment under tray. Internet research also indicate that this is a fairly widespread problem affecting at least 2015-16 W205 model vehicles, and that multiple Mercedes-Benz dealerships in the United States have communicated verbally to other customers that this is a "known issue".

- Brentwood, CA, USA

In February 2019 the C300 engine light came on, took the vehicle to the dealer and they said it was a bad catalytic convertor, and the dealer took three days to repair it. Three weeks later in March 2019, while driving 25 miles per hour straight on a residential street the car shut off without a sound, all the lights on the instrument cluster lit up, and the car coasted to a stop on the side of the road. I trie to restart the car, the starter made noise but the engine would not turn over. I called roadside assistance and did the three time lock and unlock routine, and the car would not start. After towing the car back to the same dealer, they told me the car was showing no codes, the issue could not be replicated and the car should be fine to drive again! I'm now afraid to drive the vehicle, and the dealer is refusing to fix it.

- Celebration, FL, USA

There's a constant gas smell in my car. The dealership claimed it was a leak twice, but that can't be the problem because it still carries the smell.

- Spring, TX, USA