2018 Mercedes-Benz GLC 300 Fuel system Problems
- Complaints
- 7about this part
- Share
- 8%of 87 total for the year
- Median mileage
- 14,400miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 7 complaints about the fuel system of the 2018 Mercedes-Benz GLC 300, 8% of the 87 complaints for this model year. Where a mileage was given, the median is 14,400 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I was waiting at a red traffic signal on route 7 in leesburg, va and the vehicle was in eco mode with auto stop engaged. When the light changed to green I depressed the accelerator and the car immediately shut off and the gauges on the dash all lit. It took me three attempts but it finally restarted.”
NHTSA complaint #11166030, filed 2019-01, 14,400 miles“Car failed to accelerate due to faulty fuel pump, fuel tank, etc. Car stopped and died several times in the middle of heavy traffic. Mercedes Benz of West Houston, Sewell Dealership, has my car that was towed to them late afternoon on 3/5/2024. I have owned a Mercedes for over 40 years and never had this occur or be scared due to the car’s lack of performance.”
NHTSA complaint #11576098, filed 2024-03“Positive crankcase ventilation regulator valve performance code P052E failed at 58k miles. Checked engine light came on after diagnostic scanner equipment .”
NHTSA complaint #11553066, filed 2023-11Related service bulletins
- 11036999Aug 15, 2026Dear Mercedes-Benz Owner: In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA…
- 11035490Jul 31, 2026This NCU replaces the prior NCU issued on May 15, 2025, and contains additional MY 2023 and MY 2024 vehicles which are highlighted below.
- 11019016May 30, 2025In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA is extending the warranty…
- 11018625May 15, 2025In our continuing efforts to ensure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC (“MBUSA”) is…
- 11014402Feb 21, 2025Complaint Customer-perceived problem: • Fuel gauge reading implausible • MIL ON (market-dependent) N118/3 Fault codes in control units FSCM_GEN4/5/6 • For these fault codes, the…
- 11013179Jan 24, 2025Complaint Customer-perceived problem: • Fuel gauge reading implausible • MIL ON (market-dependent) N118/3 Fault codes in control units FSCM_GEN4/5/6 • For these fault codes, the…
- 10249543Jan 18, 2024In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC (MBUSA) is extending…
- 11031586Aug 20, 2021This NCU replaces the prior NCU issued on July 30, 2021 and includes an additional population (33) of certain MY 2018 Baumusters covered under this extended warranty.
- 10205814Aug 11, 2021Fuel filler flap opens slowly/switch flashes/tank is bleeding instrument cluster warning
- 10199787Jul 30, 2021Launch EW NCU - Low Pressure Fuel Hose MY 15-17 205 213 253 172
Fuel system: other model years
Other parts of the 2018 Mercedes-Benz GLC 300
28 complaintsOther or unknown
20 complaintsElectrical system
13 complaintsBody and structure
9 complaintsSeat belts
8 complaintsTransmission and drivetrain
8 complaintsAir bags
6 complaintsBrakes
5 complaintsForward collision avoidance
3 complaintsSteering
3 complaintsVehicle speed control
3 complaintsVisibility (wipers, defrost, mirrors)
3 complaints
← All problems reported for the 2018 Mercedes-Benz GLC 300
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology