2023 MERCEDES BENZ GLC 300 Engine Problems

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.

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.

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)

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

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.

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)

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.

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.

Mileage: 400

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

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

While driving on highway at 75 mph, the car began slowing down and an alert on the screen said "Stop. Switch off vehicle". Then the alert on the screen showed that the 48 volt system needed to be recharged. The car would not start and had to be towed to the dealership. The dealership says the car was out of gas, but the gauges did not indicated that the fuel was empty, so they will reset all of the sensors, but they still do not know why the car turned off and could not be restarted. They are checking the software because they cannot find anything wrong.

1 ) the car would not start several times. every error message scanned across the screen and i had to leave the car and lock it and wait 10-15 minutes and then it would start. if i had any type of emergency and this happened, it would be detrimental. the first time this happened was the day i got the car with less than 10 miles on it. this issue was recreated by service and a software update was performed and it hasn’t happened since. 2 ) all computers / screens turned off while the car was in drive and in motion. horrifying and so dangerous. i had no safety features active , as they all display on the two screens. this happened with less than 500 miles on the car. this was not duplicated by service and it happened one time. 3 ) the sunroof malfunctioned and would not close after the software update was performed. i had to bring it back the very next day. this problem was duplicated by service and was repaired. 4 ) today the camera / visibility system malfunctioned giving an error message “ system inoperative “. i drove it to service an hour after it happened. it makes me completely distrust every electronic component of the vehicle which scares me so much to even drive it not knowing if and when safety features will fail. mileage est 1350. i’m not sure if they have duplicated it, as it’s still in the shop. i have videos of the other issues but the form won’t let me upload videos. i uploaded a picture of the 4th issue in my report.

Unexpectedly and without any indication or warning, at [XXX] on [XXX] I experienced multiple system failures/engine light/critical warning lights/. Transmission error message states do not shift into gear, take for service. Engine check light on. Car would not start, car was unable to be put into park. Door alarm for transmission not in park was alarming audible. After car shut off and attempt to put into park the car would not engage into park and the car electronics malfunctioned, would not stop alarming despite off, multiple error messages, including traction control inoperative, blind spot inoperative, digital light inoperative, check the 48V batter Error, and other messages toggling on. Dealership Bergeron Mercedes made aware of problem on 8/04 And was told no appointments or lands car available and to drop off Monday sans appt, name on wait list. VIN [XXX] . This is a common problem on all of the forums regarding this first what new models hear 23 releases. I was unable to put the car into park and the parking brake could not hold in place/trusted. Also, the digital light malfunctioned and high beam assist and digital light. Became inoperative due to failed wheel level sensor. Car has less than than 5K miles /less than 3 months old. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The 2023 GLC300 would not start. The internal alarms kept going off, the push-start/stop would not respond. The vehicle was acting like it was being stolen, this lasted for 75 to 80 minutes. The display said 12V On-Board Electrical System Service Required and Blind Spot Assist Inoperative - over and over again. Couldn't get the key to make car lock or unlock. The car would not turn on, it would not turn off. The alarm message was persistent. Had to call a tow-truck to take it in for service. After 3+ hours the car restarted. Mercedes initiated "Campaign: Update Powertrain Control Unit Software #2023060007". They found multiple communication faults in various modules. I was left stranded. This happened 3 times. Twice in front of the house and the 3rd time (when it was towed) I was far from home. The mechanic explained that the car had sensors indicating the car was being stolen so that is why it didn't start. That make no sense! I had the key. I had been driving it that day. It was working fine. A brand new 2023 car should be reliable. It should start when the owner has the key fob in hand. Shutting the car down for hours is a system failure. Please investigate.

Sunday, June 25, when I was driving the car on the road, the engine shut off and the car stopped running. 3 warning lights show on screen: engine light; 48v Battery Service Required; 12v Battery service required. I used the break to park the car on the roadside after that. I tried many times to restart the car, Waited over one hour and 40 minutes it finally started again, the engine warning light was still on until the second day morning, and I was able to take pics as evident. 1. What component or system failed or malfunctioned, and is it available for inspection upon request? Yes, but on the second day, the MB service dep told me that the car was having a system update (while I was driving the car and it turned off the engine by doing that) 2. How was your safety or the safety of others put at risk? I was still driving with 40m/h+ on the road, my car suddenly having a malfunction. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? No, I called MB USA, they started a purchase buyback application, but still let me drive that car. 4. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? No. The 3 warning lamps showed when the engine shut off while I was driving. There was no other symptoms of the problem prior to the failure. The car is new, 2023 GLC 300, the dealership is AutoNation, only has 2400 miles on it do far, one month only so far.