This Problem Across All Years
The Valve body control failed. I took the car into the dealership but upon doing some searching this seems to be a common issue amongst owners of this vehicle/make model. The transmission won't go beyond 5th gear (of 9) so it's is dangerous to drive on the interstate. The car doesn't shift into drive, only shifts into N, the reverts automatically to park. It required the engine shutting on/off multiple times and only then does it go into 3rd gear, causing the vehicle to jump due to missing gears. This issue could leave an owner stranded at any time and cause injury due to the limitations of the gears. It was inspected and confirmed behavior by Mercedes in Durham NC. There were no warning lamps, there were no signs of the issue. The technician did plug it in and was able to read the fault codes but it didn't trigger a light. The appeared first about 45 days ago, and the vehicle was taken in to be looked at 7/21/25.
The Valve body control failed. I took the car into the dealership but upon doing some searching this seems to be a common issue amongst owners of this vehicle/make model. The transmission won't go beyond 5th gear (of 9) so it's is dangerous to drive on the interstate. The car doesn't shift into drive, only shifts into N, the reverts automatically to park. It required the engine shutting on/off multiple times and only then does it go into 3rd gear, causing the vehicle to jump due to missing gears. This issue could leave an owner stranded at any time and cause injury due to the limitations of the gears. It was inspected and confirmed behavior by Mercedes in Durham NC. There were no warning lamps, there were no signs of the issue. The technician did plug it in and was able to read the fault codes but it didn't trigger a light. The appeared first about 45 days ago, and the vehicle was taken in to be looked at 7/21/25.
Vehicle has previous recalls done and still has the same issues with recall. Srs code no air bag will deploy. Dealer ship refused to service vehicle due to miscommunication and I'm driving a defective vehicle without an airbag which could lead to a bad accident waiting to happened. I will like to file a complaint against Mercedes of Richmond for refusing to service my vehicle without a defective air bag and the passenger seat bear latch doesn't retract properly. So I'm currently dealing with 2 huge safety hazard and was denied service due to a miscommunication with Steven Powers (service technician) at Mercedes of Richmond! I will like an investigation done.
Vehicle has previous recalls done and still has the same issues with recall. Srs code no air bag will deploy. Dealer ship refused to service vehicle due to miscommunication and I'm driving a defective vehicle without an airbag which could lead to a bad accident waiting to happened. I will like to file a complaint against Mercedes of Richmond for refusing to service my vehicle without a defective air bag and the passenger seat bear latch doesn't retract properly. So I'm currently dealing with 2 huge safety hazard and was denied service due to a miscommunication with Steven Powers (service technician) at Mercedes of Richmond! I will like an investigation done.
No incident my vehicle has a front left malfunction service required light and issues with the passenger seatbelt not proper latching. Upon checking I notice my car had previous recalls done. It seems as if the same issues has come about. NHTSA: 18v177- seat belt not retracting properly. NHTSA: 17V627 is related to the steering column switch replacement of clock spring. So if me or a family member was to get into an accident no airbag will deploy! Huge safety hazard!
No incident my vehicle has a front left malfunction service required light and issues with the passenger seatbelt not proper latching. Upon checking I notice my car had previous recalls done. It seems as if the same issues has come about. NHTSA: 18v177- seat belt not retracting properly. NHTSA: 17V627 is related to the steering column switch replacement of clock spring. So if me or a family member was to get into an accident no airbag will deploy! Huge safety hazard!
The contact owns a 2017 Mercedes-Benz GLC300. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed, however, the vehicle failed to accelerate as intended. In addition, the check engine warning light illuminated. The vehicle was taken to the dealer where it was diagnosed with a failed positive crank valve. The contact was informed that the positive crank valve needed to be replaced. In addition, the contact was informed that the repair was covered under an extended warranty program, however, the parts were on backorder. The vehicle was not repaired. The contact stated that the failure began in December 2023, however the warranty repair was completed in September 2024, due to parts being on back order. The vehicle was repaired, however, the failure reoccurred. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed, however, the vehicle failed to accelerate as intended. In addition, the contact heard a loud boom that came from the engine. The vehicle was taken to the dealer where it was diagnosed with a blocked turbo. The contact was informed that the turbo needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 94,000.
The contact owns a 2017 Mercedes-Benz GLC300. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed, however, the vehicle failed to accelerate as intended. In addition, the check engine warning light illuminated. The vehicle was taken to the dealer where it was diagnosed with a failed positive crank valve. The contact was informed that the positive crank valve needed to be replaced. In addition, the contact was informed that the repair was covered under an extended warranty program, however, the parts were on backorder. The vehicle was not repaired. The contact stated that the failure began in December 2023, however the warranty repair was completed in September 2024, due to parts being on back order. The vehicle was repaired, however, the failure reoccurred. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed, however, the vehicle failed to accelerate as intended. In addition, the contact heard a loud boom that came from the engine. The vehicle was taken to the dealer where it was diagnosed with a blocked turbo. The contact was informed that the turbo needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 94,000.
The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while at a stop light, the vehicle independently shifted to neutral(N) for approximately 5 minutes. The vehicle failed to release from neutral when the driver shifted the gear shifter. The contact stated that the transmission then released from neutral(N), and the vehicle jolted forward. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, who was unable to determine the cause of the failure. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 75,000.
The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while at a stop light, the vehicle independently shifted to neutral(N) for approximately 5 minutes. The vehicle failed to release from neutral when the driver shifted the gear shifter. The contact stated that the transmission then released from neutral(N), and the vehicle jolted forward. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, who was unable to determine the cause of the failure. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 75,000.
One morning I was driving the GLC-300 about 45 mph, when suddenly the car went from 45mph to 0 in 3 seconds. The car stopped and it would not move forward. The car was towed to the Mercedes Benz dealership and it was discovered that front differential was broken. The car has 55k original miles and it's maintained very well. There was no warming light on the dashboard to indicate this problem. If the car was traveling at speed of 55 or 65 mph, it could have caused a catastrophe. This is very unusual for front differential to break. This needs to be investigated by NHTSA and I'm sure there are other customer that run into this issue. Since the car out of manufacture warranty, Mercedes Benz covered the cost of the part, but I had to pay for the labor which was a lot. The dealership admitted that it was unusual for the front differential to break specially for Mercez Benz car.
One morning I was driving the GLC-300 about 45 mph, when suddenly the car went from 45mph to 0 in 3 seconds. The car stopped and it would not move forward. The car was towed to the Mercedes Benz dealership and it was discovered that front differential was broken. The car has 55k original miles and it's maintained very well. There was no warming light on the dashboard to indicate this problem. If the car was traveling at speed of 55 or 65 mph, it could have caused a catastrophe. This is very unusual for front differential to break. This needs to be investigated by NHTSA and I'm sure there are other customer that run into this issue. Since the car out of manufacture warranty, Mercedes Benz covered the cost of the part, but I had to pay for the labor which was a lot. The dealership admitted that it was unusual for the front differential to break specially for Mercez Benz car.
I HAVE EXPERIENCED RECURRENT BUT INTERMITTENT ISSUES WITH THE TRANSMISSION/ACCELERATION OF MY MERCEDES GLC 300 2017. TODAY, AFTER I WENT UP AND THEN DOWNHILL, THE CAR SLOWED DRAMATICALLY ON ITS OWN. WHEN I PUSHED THE GAS PEDAL TO THE FLOOR, THE CAR DID NOT RESPOND IMMEDIATELY. AFTER SEVERAL SECONDS, THE CAR STARTED TO ACCELERATE. IN THE MEANTIME, I WAS WORRIED I WOULD BE REAR-ENDED BY TRAFFIC BEHIND ME. I HAVE HAD SIMILAR PROBLEMS IN THIS SAME SPOT (WHICH I DRIVE NEARLY DAILY) IN THE PAST, SUGGESTING GOING OVER THE HILL HAS SOMETHING TO DO WITH IT (E.G., ONCE, IN THIS SPOT, WHEN MY DAUGHTER WAS IN THE CAR WITH ME, THE CAR JERKED SO STRONGLY WHEN IT STARTED TO GO THAT MY DAUGHTER THOUGH WE WERE INDEED REAR ENDED). ALTHOUGH THIS SPOT MOST OFTEN REVEALS THE PROBLEM, THE ISSUE HAS HAPPENED ON FLAT AREAS AS WELL. FOR INSTANCE, PULLING OUT OF A SHOPPING CENTER, I SIMILARLY FOUND THE ACCELERATOR NON RESPONSIVE. DRIVING MY DAUGHTER TO TENNIS ONE DAY, THE CAR REPEATEDLY JERKED DRAMATICALLY WHEN SHIFTING, PRIMARILY IN 2ND AND 3RD. GENERALLY, THE ISSUES SEEM TO HAPPEN MOST FREQUENTLY IN THESE GEARS. ALTHOUGH THE TRANSMISSION SEEMS TO CONSISTENTLY TAKE LONGER TO SHIFT IN THESE GEARS, THE MORE DRAMATIC PROBLEMS DO NOT HAPPEN DAILY, MAKING IT HARD TO TROUBLE SHOOT (WHEN I TOOK IT TO MY DEALER, THEY RAN THEIR COMPUTER TESTS, AND COULD NOT DETECT ANY PROBLEMS). I AM WORRIED, THOUGH, THAT I WILL EVENTUALLY BE REAR ENDED OR OTHERWISE HAVE THIS PROBLEM LEAD TO AN ACCIDENT. I HAVE SEEN SOME OTHER REPORTS OF THIS ISSUE IN ONLINE FORUMS, AND HOPE NHTSA CAN CHECK INTO OR AT LEAST TRACK IT.
I HAVE EXPERIENCED RECURRENT BUT INTERMITTENT ISSUES WITH THE TRANSMISSION/ACCELERATION OF MY MERCEDES GLC 300 2017. TODAY, AFTER I WENT UP AND THEN DOWNHILL, THE CAR SLOWED DRAMATICALLY ON ITS OWN. WHEN I PUSHED THE GAS PEDAL TO THE FLOOR, THE CAR DID NOT RESPOND IMMEDIATELY. AFTER SEVERAL SECONDS, THE CAR STARTED TO ACCELERATE. IN THE MEANTIME, I WAS WORRIED I WOULD BE REAR-ENDED BY TRAFFIC BEHIND ME. I HAVE HAD SIMILAR PROBLEMS IN THIS SAME SPOT (WHICH I DRIVE NEARLY DAILY) IN THE PAST, SUGGESTING GOING OVER THE HILL HAS SOMETHING TO DO WITH IT (E.G., ONCE, IN THIS SPOT, WHEN MY DAUGHTER WAS IN THE CAR WITH ME, THE CAR JERKED SO STRONGLY WHEN IT STARTED TO GO THAT MY DAUGHTER THOUGH WE WERE INDEED REAR ENDED). ALTHOUGH THIS SPOT MOST OFTEN REVEALS THE PROBLEM, THE ISSUE HAS HAPPENED ON FLAT AREAS AS WELL. FOR INSTANCE, PULLING OUT OF A SHOPPING CENTER, I SIMILARLY FOUND THE ACCELERATOR NON RESPONSIVE. DRIVING MY DAUGHTER TO TENNIS ONE DAY, THE CAR REPEATEDLY JERKED DRAMATICALLY WHEN SHIFTING, PRIMARILY IN 2ND AND 3RD. GENERALLY, THE ISSUES SEEM TO HAPPEN MOST FREQUENTLY IN THESE GEARS. ALTHOUGH THE TRANSMISSION SEEMS TO CONSISTENTLY TAKE LONGER TO SHIFT IN THESE GEARS, THE MORE DRAMATIC PROBLEMS DO NOT HAPPEN DAILY, MAKING IT HARD TO TROUBLE SHOOT (WHEN I TOOK IT TO MY DEALER, THEY RAN THEIR COMPUTER TESTS, AND COULD NOT DETECT ANY PROBLEMS). I AM WORRIED, THOUGH, THAT I WILL EVENTUALLY BE REAR ENDED OR OTHERWISE HAVE THIS PROBLEM LEAD TO AN ACCIDENT. I HAVE SEEN SOME OTHER REPORTS OF THIS ISSUE IN ONLINE FORUMS, AND HOPE NHTSA CAN CHECK INTO OR AT LEAST TRACK IT.