The contact owns a 2017 Mercedes-Benz C300. While driving at approximately 15 mph, the contact observed smoke emanating from under the hood. The vehicle was driven to her work location and parked. Upon exiting the vehicle and opening the hood, she observed orange flames coming from the engine compartment. A parking attendant extinguished the fire, and a police and/or fire report was filed. The vehicle was towed to a dealer and diagnosed with a fuel line leak that caused the engine harness to come apart. The leaking fuel hose from the high-pressure fuel pump caused damage to the high-pressure pump, engine harness, vacuum transducer, and coolant feed line from the thermostat to the firewall. The following components needed replacement: high-pressure fuel pump, rubber fuel hose, engine harness, pressure transducer, and intake manifold. The vehicle was repaired. Five months later, the contact experienced another failure she believes was associated with the engine fire. While parked and attempting to start the vehicle, it did not start. The vehicle was towed to a dealer and diagnosed with a faulty starter that needed replacement. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 65,422.
2017 Mercedes-Benz C300: fuel leak
6 of the 216 complaints about the 2017 Mercedes-Benz C300 describe fuel leak.
- owner complaints
- 6
- of this car's complaints
- 3%
- recalls
- 0
Fuel leak by model year
What owners say
Cabin smells heavily like fuel and has a check engine light possibly a fuel leak
There is a short rubber fuel line/hose in the engine compartment that is attached with compression clamps; the hose connects the fuel line from the gas tank to the high pressure fuel pump. When it gets cold outside (below ~40 degrees Fahrenheit) the clamps loosen a bit and the hose will leak gas The entire interior smells like gasoline, really bad.
MB USA extended the warranty coverage on the low pressure fuel hoses that connects to the high pressure fuel pump. The reason is "under certain cold ambient conditions during a cold start of the engine, the low pressure fuel hose at that connection may experience slight fuel weeping". MB USA, however, ruled out a safety risk. the federal safety agency needs to investigate it. If MB USA found the fuel pressure line is defective, they needed to do a recall. I believe it must be a recall as fuel leaks is not only a safety risk but also a serious health hazard to the occupants. What if the occupants have sinusitis and don't smell well. What if the leaks is too small to smell enough but can still be a health issue.
A fuel line in the engine compartment just above the skid plate on the drives side just right of the front wheel well leaks fuel where the line is crimped coming from the high pressure fuel pump. Fuel collects on the skid plate and when a stop at idea produces a strong fuel smell in the cabin of the car
Gas leaking is common issue and when turning car on there is a gas smell. When turning heat on there is a gas smell. Mercedes benz said there is a lot of issues with the clamps. It is a common issue. Can cause fire.
Service bulletins that may apply
Related recalls
No recalls on record for this model year.
Questions about the 2017 Mercedes-Benz C300 fuel leak
Is fuel leak a common problem on the 2017 Mercedes-Benz C300?
6 of 216 owner complaints about the 2017 Mercedes-Benz C300 (3%) mention fuel leak. The model year with the most reports is 2016.
Is there a recall or service bulletin for this on the 2017 Mercedes-Benz C300?
There are 0 recalls and 4 service bulletins for the same area of the car. Check them below with your VIN.
Other symptoms on the 2017 Mercedes-Benz C300
Check engine light 37Fuel smell 18Seat belt 14Stalling 7Sunroof shattered 7Fuel pump 5
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