Electrical complaints by model year
Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
What owners report
The contact owns a 2026 Mercedes-Benz GLC 300 4MATIC. The contact stated that her instrumental panel was not working, which caused her to be unable to see the gas level, oil, thermostat, and any warning lights. The vehicle was taken to a dealer twice. The first occasion the vehicle's instrumental panel was repaired. The failure reoccurred. The vehicle went back a second time, but was not repaired. The manufacturer was notified of the failure. The failure mileage was 5,769.
I was parked for a few minutes and I suddenly noticed a strong oder coming into my vehicle. I could not pinpoint what the smell was, but I knew that whatever was coming into the SUV was not safe. My screen started flashing warnings "Service Required: Do Not Drive" "Do Not Shift Gears". After the warning, white smoke started to roll out from under the hood and into the vehicle. I immediately ran back to get my baby out of her car seat and to safety. I was at my local YMCA and staff ran out to I assist me and had a fire extinguisher. YMCA called the police and fire department. Both were dispatched to the scene. I called my husband for help while we waited for police & fire to arrive. My husband popped the hood and we saw large blue flames coming out from the transmission or the engine and we notice that transmission fluid started to leak under the vehicle. …
The contact owns a 2025 Mercedes-Benz GLC 300. The contact stated that while her husband was driving at 5 to 10 MPH attempting to park the vehilce lunged forward traveling 20 feet and crashed into the house. The air bags deployed. No warning lights were illuminated , There was no injuries or fire. A police report was filed. The gas company was on the scene due to a gas leak. Additionally the vehilce was serviced for electrical issues. While reversing in the snow the vehilce lunged 20 feet and crashed into a unknown vehicle causing a scratch. The local dealer was contacted where the EDR was requested. The vehicle was not diagnosed or repaired. The vehilce was towed to a towing lot. The manufacturer was not contacted The failure mileage was approximately 17,107. The vehicle was deemed a total lost.
The contact owns a 2025 Mercedes-Benz GLC300. The contact stated that while driving approximately 30 MPH, there was an abnormal grinding sound coming from the vehicle. The contact stated that the brake assist suddenly activated and the vehicle came to an abrupt stop, causing the seat belt to immediately retract and lock. The contact was slightly jerked from the abrupt stop. The contact stated that a warning light with a red triangle with an image of a crash in the center was illuminated. The contact stated that after starting the vehicle, the infotainment center and the instrument panel were completely black. The vehicle was restarted several times before both systems started operating as needed. …
The contact owns a 2024 Mercedes-Benz GLC 300. The contact stated that while driving at approximately 35 MPH, the brake was applied unexpectedly without the contact depressing the brake pedal. The contact stated that she was unsure if the forward collision system was turned on at that time. The driver's seat belt tightened, and she sustained a bruise on her left arm and soreness on her chest. Medical attention was required. The vehicle was taken to a dealer where they were not able to replicate the failure. On another occasion, while parked, the tailgate was opened as groceries were being loaded into the rear cargo area. The tailgate closed inadvertently and struck the contact's head. The contact sustained head and neck injuries, and medical attention was required. The vehicle was taken to a dealer where the failure was not able to be replicated. …
The contact owns a 2024 Mercedes-Benz GLC300. The contact stated that upon starting the vehicle, the check engine warning light illuminated. The vehicle was taken to a dealer and the contact was informed that the 48V bolt battery had caused the check engine warning light to illuminate. The contact was informed by the dealer that the temporary fix would be to reduce the battery charge to 25% then charge the battery to 75%. The check engine warning light returned soon after the fix and the contact was informed that there was no permanent fix for the defect. The manufacturer had yet to be notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 1,800.
The contact owns a 2023 Mercedes-Benz GLC 300 W4. The contact stated that when his wife was parking the vehicle at approximately 5 MPH and when she depressed the brake pedal, the vehicle stalled. The contact stated that his wife said that the brake pedal failed, and the instrument cluster was black. The contact stated that his wife had observed that the brake warning had been illuminated before the instrument cluster failure. The contact stated that his wife jumped the curb and crashed into the wall of a building. The contact stated that the front end of the vehicle was crushed, and the hood was damaged. The contact stated that the front headlights and front bumper were also crushed. The contact stated that the windshield was cracked as well. The contact stated that his wife was unhurt despite the air bags not deploying. …
The contact owns a 2023 Mercedes-Benz GLC300. The contact stated that while driving at an undisclosed speed, the speed limit warning system failed to function as intended. The contact stated that while driving 60 MPH, the Heads-up Display (HUD) illuminated a red light and an unknown message about driving too slowly was displayed. The contact stated that the red light illuminated and flashed intermittently. The vehicle was taken to the dealer, and the contact was informed that the failure was common with the vehicle. The vehicle was not repaired. The contact stated that the failure persisted. The contact asked if the speed limit warning system could be deactivated, and the dealer was informed that it had to be approved by the manufacturer. The manufacturer was made aware of the failure. The contact was referred to the dealer for assistance. …
Related recalls (7)
Electrical system › Instrument cluster/panel
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2024-2026 AMG GT, C-Class, E-Class, SL, CLE, and GLC vehicles. The infotainment control unit may reset while the vehicle is in motion and cause the instrument panel display to go blank.
Remedy: Dealers will update the infotainment control unit software, free of charge. Owner notification letters were mailed June 29, 2026. MBUSA's number for this recall is 2026050004.
Electrical system › Wiring › Fuses and circuit breakers
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023-2024 C-Class, E-Class, S-Class, SL, GLC, EQE SUV, EQE, EQS SUV, and EQS vehicles that were incorrectly repaired under recall 24V-115. An incorrect fuse box that was not designed for the vehicle may have been installed.
Remedy: Dealers will inspect and replace the main fuse boxes, free of charge. Owner notification letters were mailed June 6, 2025. Owners may contact MBUSA customer service at 1-800-367-6372.
Electrical system › Wiring › Fuses and circuit breakers
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023-2024 C300, AMG C43, S580e, S580, Maybach S580, Maybach S680, AMG SL43, AMGSL63, GLC300, EQE350, EQE500, EQS450, EQS580, AMG EQS, 2023 S500, AMG SL55, AMG EQE, 2024 E350, E450, AMG C63e S, CLE300 Coupe, CLE450 Coupe, and GLC300 Coupe vehicles.
Remedy: Dealers will replace the main fuse boxes, free of charge. Owner notification letters were mailed April 5, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2024030008.
Electrical system › Software
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2019-2021 CLA-Class, GLE/GLS-Class, A-Class, E-Class, E-Class Coupe and Convertible, GLA/GLB-Class, GLC-Class, CLS-Class, and AMG GT-Class 4-door Coupe vehicles. Please refer to MBUSA's recall report for specific vehicle model details.
Remedy: The multimedia system software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. Owner notification letters were mailed beginning June 28, 2021.
Electrical system › Software
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 AMG GT-S, GLC300, CLA250 and GLE300d 4Matic vehicles, 2013 C250, E350 BlueTec and G63 AMG vehicles, 2008-2014 C300 vehicles, 2013-2014 C300 4Matic and ML350 4Matic vehicles, 2009 C350 vehicles, 2014 CLS550, E350 4Matic, E350 Coupe 4Matic, E350 Wagon 4Matic, GLK350 and…
Remedy: MBUSA will notify owners, and dealers will update software in the affected control units, free of charge. The recall began April 21, 2017. Owners may contact MBUSA customer service at 1-800-367-6372.
Show 2 more recalls
Electrical system › Starter assembly
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2015-2017 C300 4Matic, C300, CLA250, CLA250 4Matic and CLA45 AMG vehicles, 2017 C300 4Matic Cabrio, C300 4Matic Coupe, C300 Cabrio, C300 Coupe, E300, E300 4Matic, E400 4Matic Wagon, E43 AMG 4Matic, GLA250, GLA250 4Matic and GLC300 4Matic Coupe vehicles and 2016 C350e and…
Remedy: MBUSA will notify owners, and dealers will install an additional fuse in the electrical line to the starter, free of charge. The recall began August 31, 2017. Owners may contact MBUSA customer service at 1-800-367-6372.
Electrical system › Wiring
Mercedes-Benz USA, LLC (MBUSA) is recalling certain model year 2016 GLC 300 vehicles manufactured June 16, 2015, to November 3, 2015, and 2016 GLC 300 4Matic vehicles manufactured July 16, 2015, to November 3, 2015.
Remedy: MBUSA will notify owners, and dealers will inspect the wiring harnesses, properly rerouting them as necessary. Any damaged harnesses will be replaced. These repairs will be performed free of charge.
Frequently asked questions
Which Mercedes-Benz GLC300 years have electrical problems?
By NHTSA complaints, the 2023 (30), 2025 (18), 2017 (15), 2019 (14) and 2018 (13) model years. Electrical complaints make up 47% of all complaints for the 2023.
Is there a recall for Mercedes-Benz GLC300 electrical problems?
Yes — 7 recalls, including 26V-281 (instrument cluster/panel, May 1, 2026); 25V-255 (fuses and circuit breakers, May 12, 2025); 24V-115 (fuses and circuit breakers, Feb 16, 2024). Recall repairs are free at authorized dealers; check a specific car with the VIN recall check.
At what mileage do Mercedes-Benz GLC300 electrical problems start?
Across all years, half of the complaints with a recorded mileage happened before about 11,000 miles; 100% happened before 50,000 miles.
What part fails most often?
Owners most often name the ignition › anti-theft › immobilizer/proximity › key/sender (1 mentions), followed by the ignition (1).
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.