Mercedes-Benz GLC-Class Complaints

782 consumer complaints on file.

#11533774July 22, 2023
ENGINE
Keep having check engine light due to fault code *P052E71 The valve for crankcase ventilation malfunction-the actuator is blocked Many of 2018 Mercedes Benz GLC 300 experienced the same issue.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11533472July 20, 2023
ELECTRICAL SYSTEM
Petition: Consumer requests a focused review of the ISG 48-volt onboard electrical system used in various Mercedes-Benz vehicles and the expansion or initiation of a new recall to include 2023 300GLC vehicles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11532016July 13, 2023
ENGINE
Positive crankcase ventilation system failure. P052e(77)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11531489July 10, 2023
UNKNOWN OR OTHER
My panoramic sunroof shattered while I was driving on the highway. There was a loud, sonic noise, like a gunshot and the glass shattered. There were no large trucks near me and after checking the roof, there was no object on the roof that could have caused it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11530701July 6, 2023
STEERING
The contact owns a 2022 Mercedes-Benz GLC300. The contact stated while driving over 50 MPH, the steering wheel was vibrating. The vehicle was taken to the local dealer who was unable to duplicate the failure. The contact continued to experience the failure. The contact took the vehicle back to the local dealer and was informed that the vehicle was repaired under an unknown manufacturer recall and the steering wheel bracket was replaced, and the steering wheel software was updated. The vehicle was repaired but continued to experience the failure. The vehicle was taken back to the dealer however, the dealer was unable to duplicate the failure. The contact continued to experience the failure. The contact took the vehicle back a fourth time, but the dealer was unable to duplicate the failure. The contact continued to experience the failure and the vehicle was taken back to the dealer however, the dealer was unable to duplicate the failure. The vehicle was taken to a second dealer, Mercedes-Benz of Rockville Centre (110 W Graham Ave, Hempstead, NY 11550, (516) 766-6900), but the dealer was unable to duplicate the failure. The vehicle was not repaired. The manufacturer had been informed of the failure. The failure mileage was 5,742.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11530442July 5, 2023
STRUCTURE:BODY
1. The rear hatch has opened while the car was left unattended. 2. If the hatch opens it could possibly cause a safety issue: a.By opening while driving. This has not happened and I do not know if Mercedes has a safety lock to ensure this could not happen. b.Open while parked and unattended. The vehicle would be unsecured with items being subjected to being stolen. c.Open while parked at the store, mall, etc. A stranger could get in the rear of the vehicle, close the hatch and wait for me to return causing a dangerous situation. d.Open and damage the garage door if parked in the garage; e.Open while someone is in the back of the vehicle. Should this happen, a person could be pinned against another vehicle or garage door. 3.Mercedes Benz is aware of this issue on many of their vehicles. I was told the S class Mercedes has had a similar problem and Mercedes reprogrammed the key fob to a “2X push of the rear hatch button on the key fob”. They have yet to do this on my vehicle. 4.The vehicle has not been inspected by Mercedes, however, in discussing this with the Mercedes Service Department they are aware of this issue and as of today there is not a similar fix as to that of the S class Mercedes. Mercedes is aware of this problem but has yet to offer a fix. Also, upon doing an internet search, I have discovered others having experienced similar problems over the course of many years. 5.There were no warning lamps, messages, or other symptoms relating to the problem. This problem first appeared within a few miles of owning the vehicle. The vehicle is currently has about 1,100 miles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11530039July 2, 2023
STEERING, ELECTRICAL SYSTEM
Excessive steering wheel vibration after the software update. Mercedes main office in Georgia was notified and they instructed there is a fix after I threatened the lemon law. Time on dash will read random times, then will fix itself. Air conditioner will not run cold to drivers side.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11529864July 1, 2023
EXTERIOR LIGHTING, ELECTRICAL SYSTEM, ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11527424June 16, 2023
UNKNOWN OR OTHER
At 35,000 miles the check engine light came on, error message was checked at a Mercedes dealership and read a Crankcase Vent Valve malfunction. The malfunction causes issues with acceleration and causes a high RPM idle and accelerates engine wear. After researching online, this problem has occurred to a huge number of 2015-2018 Mercedes GLC 300’s, with many people having to make this $2,000 repair every 2 years.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11527446June 16, 2023
POWER TRAIN
On May 14, 2023, with a little over 44,000 well-kept miles and under normal driving conditions, my 2018 GLC43 AMG blew smoke out the rear and soon after presented pooling oil under the transmission/engine area. Upon inspection by a reputable transmission repair specialist, AAMCO in Los Angeles, it was determined that the cause of the issue was a broken bolt head in the torque converter, resulting in significant internal damage. The bolt's failure was suspected to be the result of a manufacturing defect, as it is highly unlikely for such a crucial component to fail under normal operating conditions. The process to identify and rectify this issue involved dropping the transmission, inspecting for damage, replacing the torque converter with a new Mercedes-Benz part, and replacing all four torque converter bolts to ensure no further defects were present. Lastly, the transmission had to be resealed using a factory kit, refilled, and reinstalled. This all amounted to a significant total of $5,100 including parts and labor. This does not include the additional ~$500 spent on a rental car during the lengthy repair period.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11525409June 5, 2023
ELECTRICAL SYSTEM
When starting the vehicle, all the lights and alarms have come on and vehicle is not drivable. This has happened 4 times. 3/4 times the vehicle has started after an hour or two. One time I have had to have it towed in. I bought this car on April 27th. First time this happened was 5/29. I have been without the use of this car for 28 days today. The service manager called today and Mercedes is trying to fix the problem, they say it is happening to many people.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11525173June 3, 2023
ELECTRICAL SYSTEM, ENGINE, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
Vehicle stopped while driving on road. Car show "active brake assist malfunction" on the dashboard, immediately following the car will not accelerate. Shut the car off and restart, then the "check engine light" comes up. The active brake assist does not come up again, but the check engine light states on. I have taken the vehicle 5 times for this issue to the dealer, car is currently at the dealer. Reason of my report, is that I consider this situation extremely dangerous and should be investigated further. [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11524385May 30, 2023
UNKNOWN OR OTHER
P052E PCV valve issue, as for many others, this part malfunctioned about a month after warranty has expired. This seems to be a known issue for this model (GLC300) according to many online forums.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11521032May 8, 2023
UNKNOWN OR OTHER
Panoramic sunroof exploded while driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11520804May 7, 2023
FUEL/PROPULSION SYSTEM
CRANKCASE VENT VALVE PCV ENGINE LIGHT ON AIR POLLUTION DANGER STALLING DANGER
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11520527May 4, 2023
ENGINE, FUEL/PROPULSION SYSTEM
Code P052E---crankcase Vent Solenoid Valve issue---------common issue with this model----under 65,000 miles
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11520184May 3, 2023
ELECTRICAL SYSTEM, ENGINE, FUEL/PROPULSION SYSTEM
Odometer reading more miles then driven (may have been tampered with altered) There is an electrical issue The computer required to be reprogrammed has not been done yet While driving the vehicle completely stop accelerating in the middle of traffic on the interstate placed my life in danger especially because traffic was moving rapidly the vehicle was jerking horribly also several codes came on when the service light came on also needed a pcp vale hose system they never repaired it i asked to have it repaired they agreed and then stated the vehicle had to many issues was sending to auction but yet reselling the vehicle still have not repaired completely this could be dangerous
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11520208May 3, 2023
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV)
The contact owns a 2016 Mercedes-Benz GLC300. The contact stated that the check engine warning light was illuminated. The vehicle was taken to dealer, where it was diagnosed that the crankcase ventilation system needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The vehicle was taken back to the dealer, where the diagnostic result was confirmed. The vehicle was not repaired. The manufacturer was notified of the failure, and a case was opened. The failure mileage was approximately 30,000. The VIN was unavailable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11520254May 3, 2023
POWER TRAIN
Hi, Improper gear shifting. Vehicle engine light comes on with Error Code P073E, "reverse gear cannot be engaged" Vehicle would shift gear back into neutral position when put to Drive. When vehicle is able to be put in gear Reverse or Drive, a loud noise and shaking would occur. When driven, vehicle is in Limp Mode and can only go up of Gear 5. (this is a 9G Tronic, 9 gears in total) As I was backing up into street from a parking stall, I was not able to put the vehicle in Drive to proceed forward. Traffic was building up. Driver panicked. But finally was able to put it in Drive after a minute or so in the middle of the streets.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11519210April 27, 2023
ENGINE
There are lots of 2017 GLC 300 that has been having issues with PCV system that are malfunctioning that could cause engine failure. Customers are forced to spend $2000 plus to have this fixed rather than Mercedes owning its problem and fixing it. For your reference please check glcforum.com where glc owners are ranting their issues with PCV systems. https://www.glcforums.com/threads/2019-glc300-4matic-pcv-code-crankcase-ventilation-oil-separator.7997/
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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