2025 Mercedes-Benz GLC 350 E 4matic problems

Filed Oct 29, 2026 · Driver assistance · MD

On four separate occasions between April 2026 and today the Active Brake Assist systems has engaged for no reason. This has occurred in daylight as well as at night. It has occurred at low speeds (15 mph) and at highway speeds. On two occasions there was a near collision from the car behind me due to the rapid engagement of the brakes. On one occasion I suffered bruises to my arm due to the force of braking. Multiple trips to dealer (EuroMotor Cars Bethesda) found no error codes and they were unable to replicate the issue in test drives. The dealer simply reset the software and claimed all sensors, cameras and radar were functionally normally. There are no warning lights or other error messages displayed to the driver prior to the Active Brake Assist system engaging.

Filed Sep 18, 2026 · Electrical · TX

I own a 2025 Mercedes-Benz GLC 350e plug-in hybrid. The vehicle experienced a complete loss of both the digital instrument cluster/display in front of the driver and the center MBUX infotainment display. Both screens remained completely black even after the vehicle was started and placed in READY mode. The vehicle was still capable of being driven, but the driver instrument display was completely unavailable. As a result, I could not see critical information normally provided through the instrument cluster, including vehicle speed, warning messages, system status, and other important vehicle information. At the same time, there was recurring static/electrical-type noise coming through the vehicle’s speakers at regular intervals. The vehicle was shut down, locked, and allowed to power down before being restarted, but this did not restore either display. This is a significant safety concern because the vehicle can remain operational and driveable while the entire driver instrument display is unavailable. A driver should not have to operate a vehicle without access to the instrument cluster or critical warnings. I am reporting this issue to the federal safety agency because I believe a complete loss of the instrument cluster and center display while the vehicle remains driveable presents a potential safety defect. I request that the federal safety agency investigate whether this is a recurring problem affecting the 2025 Mercedes-Benz GLC 350e and whether a safety-related remedy or recall is warranted.

Filed Sep 2, 2026 · Brakes, Electrical · NJ

My 2025 Mercedes-Benz GLC 350e displayed a “48V battery malfunction” warning on or about July 1, 2026, while the vehicle was less than one year old. The vehicle was taken to an authorized Mercedes-Benz dealership and remained there until approximately July 20. Mercedes-Benz USA became involved, and the dealership ultimately stated that the malfunction had been corrected through a software update. The 48V battery was not replaced. I have not received documentation clearly identifying the specific software update, campaign, operation number, underlying failure mechanism, or pre- and post-repair diagnostic results establishing that the reported malfunction was caused and resolved by software. I am therefore unable to determine whether the battery or another component of the 48V system was defective, or whether the warning was merely cleared. In late August, I also heard a new and pronounced whirring sound near the left-front area of the vehicle after charging. A different authorized dealership charged the high-voltage battery to 100%, attempted to reproduce the sound, and found no charging-system fault codes or abnormal noise. It characterized the sound as normal post-charge cooling operation and performed no repair. I am submitting this complaint because of the original 48V malfunction, the lack of documentation identifying exactly what failed and what software remedy was performed, and the possible relevance to a previously closed the federal safety agency investigation involving Mercedes-Benz battery-related concerns. Please associate this complaint with any applicable closed investigation and evaluate whether this incident constitutes additional relevant field evidence.

Filed Aug 26, 2026 · Driver assistance · CA

The car went from 20 miles an hour and 35 miles an hour (happened 2 times) to a sudden hault like hitting a wall. The first time I had to restart the car. The second car, I had to return it to drive. A big X came up on the dashboard. I have owned the car 17 months. Both issues happened in the last 30 days. Nothing beefore. The car has 4415 miles on it. The dealer (Fletcher Jones) was unable to replicate). There was no warning. They told us it was our problem and we could report it to Mercedes Benz which we will do today.

Filed Aug 10, 2026 · Acceleration, Brakes · 9,000 miles · IL · crash

The contact owns a 2025 Mercedes-Benz GLC 350E 4Matic. The contact stated that while driving 10 MPH and attempting to park the vehicle, the vehicle unintendedly accelerated. The brake pedal was depressed, but the vehicle failed to respond. The vehicle was uncontrollable and crashed into a fence. The driver’s side mirror, bumper, and door were damaged. The contact stated that the air bags did not deploy. The instrument panel had previously gone black before the crash and the vehicle previously failed to accelerate as needed. There were no injuries sustained. A Police report was filed. The vehicle was taken to the local dealer for two prior software updates. The vehicle was towed to the local dealer but was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 9,000.

Filed Jul 14, 2026 · Visibility · 17,500 miles · CA

The contact owns a 2025 Mercedes-Benz GLC350E 4MATIC. The contact stated that while driving at 68 MPH, the sunroof glass shattered unexpectedly. The contact was able to pull over, and the vehicle was towed to the nearest dealer. The dealer had not yet diagnosed the vehicle. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 17,500.

Filed Jul 2, 2026 · Electrical · 12,540 miles · VA

The contact owns a 2025 Mercedes-Benz GLC350E 4MATIC. The contact stated that the vehicle was repaired under the federal safety agency Campaign Number: 26V281000 (Electrical System); but the recall repair failed to prevent a failure. The contact stated that while starting the vehicle, the instrument panel display was inoperable. The failure was a recurring failure. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 12,540.

Filed Jul 1, 2026 · Steering, Suspension · NY

Suspension exhibits excessive bounce/instability over road irregularities, unsafe on uneven pavement, affects steering control. Car available for inspection. Checked by two authorized dealerships, both closed as "operating as designed" without resolving it. Also inspected by manufacturer's Field Service Engineer, same result. Issue began after a phantom braking event — vehicle braked suddenly and unexpectedly on its own while changing lanes at highway speed, no obstruction present, no driver error — also damaged the steering column, since replaced.

Filed May 15, 2026 · CA

All screens on dash were black and a clicking sound could be heard I side the vehicle. This has happened four times. Towed vehicle to MB dealer and they did a software update but it keeps happening anyway.

Filed May 4, 2026 · Driver assistance, Electrical · 10,000 miles · TX

The contact owns a 2025 Mercedes-Benz GLC 350E. The contact stated that while driving approximately 60 MPH, the vehicle began decelerating, losing drive power till the vehicle stalled. The contact turned on their hazards and had the vehicle towed to the dealer. The Check Engine, Blind Assist, Exit Warning Inoperative, Towing Not permitted, with several other warning or failure lights illuminated. The failure occurred twice. The dealer diagnosed that the ignition unit had failed. The vehicle was repaired; however, the failure occurred again. The vehicle was returned to the dealer diagnosed that the motor for the instrument panel had failed and needed to be replaced. The vehicle was repaired, but the contact was not sure if the failure was resolved. The manufacturer was informed of the failure, and a case was opened. The failure mileage was approximately 10,000.