Steering wheel vibration over road irregularitiesSTEERING11 complaints2021-12 → 2026-06glc300-2022-steering-wheel-vibration
- 11445381 When driving at 40 to 60 MPH and hit shallow pot hole or bump in the road the front wheels violently shake and the steering wheel (electric steering) violently vibrates for 5 to 8 seconds. Dealer checked the vehicle and claims there is nothing wrong with it
- 11530701 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
- 11513163 At speed above 55mph , the steering wheel shakes in an abnormal and unsafe manner while traveling over a bump. This seems to be a manufacture defect and recall would be ideal
Fuel pump recall 23V-445 parts unavailability and post-repair failuresFUEL SYSTEM, GASOLINE13 complaints2023-08 → 2026-03glc300-2022-fuel-pump-recall-23v445
- 11545399 The contact owns a 2022 Mercedes-Benz GLC300. The contact received notification of NHTSA Campaign Number: 23V445000 (Fuel System, Gasoline) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the…
- 11568921 After fuel pump recall replacement, engine stopped on the highway with OBD message of low fuel pressure
- 11721373 The contact stated that while driving at various speeds and depressing the accelerator pedal, the check engine warning light was displayed on the instrument panel. The vehicle lost power and was pulled over and restarted. The contact was almost involved in several crashes
Engine cylinder head and valve seat failure with power lossENGINE7 complaints2025-12 → 2026-08glc300-2022-engine-cylinder-head-failure
- 11705704 The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. There was a misfire coming from the engine, and the vehicle lost motive power. In addition, the check engine warning
- 11667722 My 2022 Mercedes-Benz GLC 300 has been diagnosed with a valve seat failure. This requires a full cylinder head replacement. I purchased this vehicle brand new and have driven it with care, putting approximately 60,000 mostly highway miles on it
- 11755637 My 2022 Mercedes-Benz GLC 300 (17,700 total miles) suffered a catastrophic structural engine block failure and an explosive loss of propulsion while driving at highway speeds. This occurred exactly 6 days and 183 miles after a franchised Mercedes-Benz dealership performed
Sudden loss of propulsion and unintended deceleration while drivingPOWER TRAIN7 complaints2023-08 → 2026-04glc300-2022-loss-of-propulsion-highway
- 11613083 The contact stated while driving 76 MPH, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The contact stated that the vehicle speed independently decelerated. The contact safely drove the vehicle to the shoulder of the road
- 11556696 There is a constant acceleration failure where the car does not respond. Again today I was almost in a bad crash due to this. It is a known issue to many owners in Mercedes forums. It happens in any drive mode. Eco comfort sport
- 11540870 Vehicle loses power, my vehicle stop on the highway going 55 miles per hour, I came very close to being rear ended. My vehicle consumes excessive fuel, the vehicle quicks back upon acceleration
Complete loss of steering control at highway speedsUNKNOWN OR OTHER, STEERING2 complaints2025-10 → 2025-10glc300-2022-steering-loss-of-control
- 11696517 While driving on a four-lane expressway at highway speeds, my vehicle suddenly and completely lost steering control, resulting in a total inability to steer. First Incident The first event occurred during light rain with mildly wet road conditions. Without warning, the
- 11696510 I suddenly lost control of the car and could not control the steering wheel, the car ended up hydroplaning and I lost control it ping-ponged across four expressway lanes back-and-forth about 20 to 25 times with zero control of the steering wheel, barely missing the
Total electrical system shutdown while drivingELECTRICAL SYSTEM, SERVICE BRAKES, ENGINE2 complaints2024-02 → 2026-07glc300-2022-total-electrical-failure
- 11748161 All of a sudden ALL electrical and engine stopped and turned off. Only thing that was powered was instrument cluster with multiple warnings like SRS Malfunction, Steering Malfunction, SOS Inoperative, Parking Brake and more. We believe the car had also shifted to park on
- 11569909 The car randomly shows an empty tank of gas at the start of the day, when there was a half tank of gas remaining. I filled the gas, but the car did not register any fuel-up and kept showing empty. I took it to the dealer for repair and the fuel tank sensor was replaced…
Vehicle fire while drivingENGINE, UNKNOWN OR OTHER, ELECTRICAL SYSTEM2 complaints2023-11 → 2025-03glc300-2022-vehicle-fire
- 11650153 While driving on the [XXX] at the speed of 10 to 15miles per hour, I noticed a smoke in the from hood on the passenger side. I felt a danger and stopped the car and got out of the car immediately along with my friend, leaving my belongings phone and other documents
- 11557307 My father was driving home from golf. He was driving for about 5 minutes. He was at a red light and smoke started coming out of the car. He turned car off, then on. Smoke started getting worse. He put on the emergency blinkers, got on the sidewalk, and looked…
Transmission hard shift and acceleration hesitationUNKNOWN OR OTHER3 complaints2025-03 → 2025-10glc300-2022-transmission-shift-hesitation
- 11695443 The transmission intermittently shifts hard. When accelerating the car hesitates badly then lurches forward. The Dealer verified the concern, the transmission as a hard shift from 1-2nd. They performed various procedures to the hardware, but ultimately determined the
- 11646705 Delayed or stuck acceleration at slow speed
