2023 Mercedes-Benz GLC 300 engine problems

Filed Sep 7, 2025 · Engine · IL

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.

Filed Jun 22, 2024 · Brakes, Engine · IL

First of all, this is a new car produced in 2023. Since I bought it, the engine has shown alarms more than four times. Every time I went to the 4S shop, no problems were found. Today, the engine still shows a yellow alarm. Secondly, the brake disc makes a loud noise when I park the car and then start the accelerator. Mercedes-Benz has not paid attention to these problems. I think it greatly affects driving safety.This car has been sent to the 4S store many times, but the inspection has always failed. The above-mentioned problems with the car have always existed. I sincerely request your help in solving them.

Filed Jan 30, 2024 · Engine, Fuel system · MN

I have taken the delivery of this car on May 2023 and has been having many issues including but not limited to rear seatbelt malfunction that needed replacement. Recent major issue is constant 'check engine light on' for various issues. Below is the 'F' and 'I' items from 'initial quick test log' as of [XXX] and also attaching detail log file. No resolution or action has been taken after several trips to the dealership in past couple of weeks and not being able to drive due to safety concern. N127 - Control unit "Drivetrain" (PTCU) -F- N73/3*1 - Electronic ignition lock - Central gateway (EZS) -I- E1n9 - Left headlamp (SG-SW-L) -I- E1n15 - Light source module control unit front left (LSM-CU-VL) -f- E2n15 - Light source module control unit front right (LSM-CU-VR) -f- E1n14 - Digital headlamp control unit front left (DHLS-CU-VL) -f- E2n14 - Digital headlamp control unit front right (DHLS-CU-VR) -f- A66 - Battery module (48 V battery) (BM48) -F B29/13 - Left rear short range radar (NBR-LR) -I- B29/14 - Right rear short range radar (NBR-RR) -I- A40/11 - Multifunction camera (MFK) -I- N62/3 - Parking system (PARK) -I- A40/8 - Central display (ZAN) -f- N133/1 - Instrument cluster (IC) -f- INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 28, 2024 · Electrical, Engine · OH

Check engine light on, according to Mercedes Benz problem related to 48 V mild hybrid,I took twice car to the dealership ,they can’t reset check engine lights GLC 300 2023 With 3500 miles

Filed Jan 3, 2024 · Engine, Fuel system · MD

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)

Filed Jan 3, 2024 · Electrical, Engine · OH

This vehicle has now had three episodes where warning lights came on for no apparent reason. There have been two episodes of "Check Engine Light" coming on, the first with less than 1000 miles on the vehicle. It was driven to the dealer and they checked finding no problems and said not to worry about it. The second about two months later with an indication of "Excessive engine Temperature", but the engine was cold and just started, the fan was running very fast, but otherwise the vehicle was operable. Again, the dealer could find no problem and said to ignore it, but return if it recurred. Two months later, check engine light on again. Currently at the dealer for service for a third time. No faith in the reliability of this car with the reports of this leading to engine stalls and failure to start in other cars.

Filed Sep 30, 2023 · Brakes, Electrical · IL

2023 Mercedes Benz GLC 300. Several Electrical, Braking, Collision, Check Battery related issues noted. At approximately 500 miles on vehicle battery system began sending critical voltage error messages to notification app after the vehicle had been turned off. --Owner recharged battery on front terminals. At various intervals, check engine light would come on while driving, sometimes for days at a time. Sometimes for less than an hour, sometimes for a day or so but not long enough to get into a MB Dealer.---MB has less than 5,000 Miles. At approximately, 3800 miles owner received notification on phone app that the vehicle had been involved in a crash while the vehicle was sitting in a parking spot in an open parking lot with no other vehicles surrounding it. Owner was looking at the vehicle at the time of the supposed crash. Owner walked around and assessed vehicle and called MB. MB online advisors advised to take car in to have inspected for a crash. At 5400 miles vehicle was parked for less than 30 minutes. Owner returned to car and attempted to start. All warning lights, sensors and bells began going off. Check engine, 12Volt electrical system, braking and emergency braking system warning, SOS warning, etc and etc. Owner cycled through all warnings. Vehicle believed it was on when it was off. Vehicle would not start. Owner then received critical 12 Volt battery low warning messages on phone App for car. Owner tried to call MB Me Connect but the operators could not hear owner over loud alarms. Vehicle would not allow owner to lock the car to leave to get assistance. Tow called. Vehicle would not electronically switch to Neutral to be pushed to better location for attempt at jump start. Front terminal would not jump start vehicle but left connected to charge. Vehicle boost used with jump start to finally start car. Next morning Check engine light still on, App sent message battery was low despite battery charger being on car overnight.

Filed Sep 18, 2023 · Electrical, Engine · 400 miles · CA

The contact owns a 2023 Mercedes-Benz GLC300. The contact stated while attempting to start the vehicle, the message "12 Volt Battery Failure, Vehicle Inoperative" was displayed. Later, the contact was able to start the vehicle, but the check engine warning light remained illuminated. Eventually the light shut off and the vehicle operated normally. The vehicle was taken to the local dealer who performed a diagnostic test and identified multiple communications errors however, the cause of the errors was not yet determined. The vehicle was not repaired. No further information was available. The manufacturer was notified of the failure. The failure mileage was 400.

Filed Sep 10, 2023 · Engine · NJ

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

Filed Aug 31, 2023 · Electrical, Engine · CA

Car would not start warning lights on dash unable to start car