There are 3 owner-reported engine complaints for the 2023 Mercedes-Benz GLC-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Vehicle has a significant engine oil leak without being driven. Engine oil electronic meter still shows engine oil to be in "Ok" range. Vehicle is 2023 with only 19680 miles and is rarely driven till the last 2 months. Other 2023 Model Year MB GLC300's manufactured at the same Bremen Germany plant are already being recalled for engine and fuel leaks, however, this one is not on the list. This vehicle is also the 2.0L Inline 4 engine and may be the same engine as the others being recalled. The others are recalled due to an imperfect seal between the high pressure fuel pump and the tandem oil pump. My vehicle is leaking engine fluid, likely oil at a significant rate without having been driven in any unsafe manner or much use.
My car was in for a "Problem" Dec-2023 - would not accelerate /also getting very bad gas mileage and hesitation on accelerating. 1ST - Mercedes Benz said I got bad gas - they had the car for several days -Then they thought it was a computer issue - Later -after problem -I got a Safety Recall Notice # 23V456 stating "Fuel Pump Problem "told would receive Official Re-Call in February -Went back to dealer with same problem -was told wait for re-call -Called 1-800-367-6372 Mercedes Benz - spoke with "Heidi on Jan 3, 2024 [Case Number [XXX] ASKED IF THEY COULD EXPEDITE RE-CALL CLAIM BEFORE FEBRUARY - MERCEDES DECLINED - If the "Fuel Pump is an issue [and Dangerous ] why not expedite ""Parts"" Mercedes Dealer wasn't aware of Re-Call number 23V456 - INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
1.This is my new GLC 300 and after taking delivery and running for around 300 miles check engine light on my dashboard 2.Took it to Ray catena freehold service center and they kept this vehicle for 2 days and ran test and said no issues or no error codes found for the engine light 3. Service department said they cleared all the codes and updated the software and it should be good 4. After taking it from service center the check engine light is again on and its quite random 5. The check engine light goes off on its own and then pop up when i start again and its quite random 6. Worried whether this vehicle is road worthy or not 5. This all started when a message from the 12 v battery came in Mercedes me app saying its draining so start the vehicle after that this message is quite randomly coming
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026