2017 Mercedes-Benz GLC300 fuel/propulsion system problems
13 owner complaints filed with NHTSA name the fuel/propulsion system on the 2017 Mercedes-Benz GLC300 — 13% of all complaints for this model year.
What owners report
“Strong gasoline smell coming from the engine bay every morning at start up. I removed protective plastic lining from the under carriage to identify the issue. I identified a lot of gasoline dripping from the top portion of the engine compartment where the High Pressure Fuel Pump is located. There…”
filed Dec 18, 2024
“After noticing my engine light come on, I had my vehicle checked out, the dealer informed (after spending $250.00) that the problem is the crankcase ventilation and it's a common problem. It seems the oh so familiar crankcase ventilation system is not working. This is a common problem with the…”
filed Jan 3, 2024
“I smell gas in my car. There is a recall for the fuel parts on the 2019. I have a 2017 with the same issue.”
filed Feb 5, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Fuel/propulsion System problems in other GLC300 years
| Year | Reports | Share |
|---|---|---|
| 2016 GLC300 | 18 | 14% |
Other reported problem areas on the 2017 Mercedes-Benz GLC300
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.