MERCEDES-BENZ Complaints

The contact owns a 2010 Mercedes-Benz GL450. The contact stated that while driving at undisclosed speeds, the brake pedal was depressed, but the vehicle failed to respond. The contact depressed the brake pedal harder, and the vehicle responded as intended. There was no warning light illuminated. The vehicle was taken to the dealer to be repaired under NHTSA Campaign Number: 22V315000 (Service Brakes, Hydraulic). The dealer determined that the brake booster had failed; however, the part to do the recall repair was not yet available. The vehicle was not repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The failure mileage was approximately 90,000.

The vehicle entered dealer custody in 08/2025 after a dead battery / lockout repair event and was returned by the dealer on 01/08/2026 after months in dealer custody for repair work. Before entering dealer custody, the vehicle was drivable. The dealer documented a completed road test and inspection, but the vehicle was returned in unsafe and inoperable condition. Immediately after dealer return, on the drive home, the vehicle shook violently and emitted a strong burning smell, requiring multiple stops. The condition was later duplicated with dealer personnel during a road test. Despite that, the dealer refused meaningful diagnostic work and later returned the vehicle by flatbed. Since that return, the front brakes appear seized/engaged. If the vehicle is placed in drive, it remains stationary. If throttle is applied, it moves only slightly while squealing as though the brakes are locked on. The vehicle is not safely drivable and has remained inoperable since 01/08/2026. This created a safety risk because the vehicle was returned for use on public roads despite violent shaking, burning odor, and what appears to be brake seizure/drag. The symptoms were reproducible and were brought to the dealer’s attention immediately. The vehicle remains available for inspection.

The vehicle experienced multiple electrical and safety-related malfunctions while driving. On several occasions the instrument cluster and vehicle screens suddenly went black while the vehicle was in motion, causing loss of critical driving information such as speed and warnings. In another incident the vehicle displayed a “High Voltage Malfunction” warning while driving and the vehicle shut down shortly after. This resulted in a sudden loss of propulsion and created a dangerous situation on the road. The vehicle has also displayed a “Coolant Too Hot – Stop Vehicle” warning which required replacement of the coolant pump at the dealership. In a separate event the vehicle lost battery charge unexpectedly after indicating a full charge and had to be towed to a charging station. The vehicle is also subject to Safety Recall 26V073 involving the high-voltage battery. According to the recall notice, the battery may fail due to an internal short circuit which could lead to a vehicle fire while parked or driving. The manufacturer currently does not have a repair available and advises owners to limit the battery charge to 80% and park the vehicle outside when not in use due to the potential fire risk. These repeated failures combined with the unresolved safety recall raise serious concerns about the safety and reliability of the vehicle. The issues began around September 2024 and have continued through multiple repair visits into March 2026.

The vehicle is under a safety recall with no permanent fix and is restricted to 80% charging. Even with 8-% charging it is prone to catch fire risks. This reduces usability and raises safety concerns. I

When driving on the highway going 65mph the car slipped in neutral and error showed on dashboard "transmission malfunction stop." I could steer and break, but not accelerate. Pulling over on side of highway, I was able to put in park and then drive. I pulled off the exit and the car did the same thing within 10 mins. Car was towed to Mercedes dealership in Warwick, RI. I was made aware after inspection that there was nothing wrong with the vehicle nor the transmission, but rather there was a needed software update that was causing the issue that had been identified previously. Regular service was due, but no indication whatsoever of the error I saw nor any other error codes. No error showed up for the technicians in inspecting the car. I was further informed, after research, that the software update was being drafted and that it would have to pass NHTSA governance. So I'd like to know if this is accurate? If NHTSA is aware? If the software update is sitting with you for approval? What is Mercedes obligation to share this with drivers noting they were aware of issue? If my [XXX] was driving she could have been killed. If I was accelerating on the highway or turning in front of a vehicle legally, I could have been killed. Thank you. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2023 Mercedes-Benz EQB 250. The contact received notification of NHTSA Campaign Number: 26V073000 (Electrical System). The contact called the local dealer and manufacturer about the recall repair and was informed that the part was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. Additionally, the contact stated that the charger input had been replaced twice. The dealer informed the contact that the failure was caused by using public charging stations. The failure mileage was unknown.

The contact owns a 2025 Mercedes-Benz GLA250. The contact stated that while his wife was stopped at a traffic light and attempting to depress the accelerator pedal, the vehicle failed to respond as intended. The vehicle shut off unexpectedly, and the gear shifter ceased. A dealer was contacted. The vehicle was towed to dealer, where it was diagnosed and it was determined that the ABS sensors and transmission needed to be replaced. The vehicle was repaired, and the ABS sensor was replaced. The contact stated that the failure had occurred on several occasions. The manufacturer was notified of the failure and informed the contact that the vehicle could be traded. The manufacturer requested a buyback, but the request was denied. The approximate failure mileage was 18,500.

The contact leased a 2023 Mercedes-Benz EQB 300 4Matic. The contact received notification of NHTSA Campaign Number: 26V073000 (Electrical System); however, the part to do the recall repair was not yet available. The dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact expressed safety concerns and stated that several related recalls were previously performed on the vehicle. Additionally, the contact stated that the vehicle failed to perform according to the lease agreement. The manufacturer was made aware of the issue and offered a monetary compensation that required the contact to sign a release form. Additionally, the manufacturer informed the contact that the vehicle did not meet the State’s Lemon Law criteria. The contact declined the monetary compensation. The contact had not experienced a failure.

My vehicle is not included in the current high voltage battery recall under NHTSA recall 26V073, as it has a manufacture date of 08/2024 per door jamb sticker, however, page 5 of the NHTSA report explicitly states “A change in the production procedure of our supplier ensures that this issue can no longer occur on vehicles produced from July 31, 2024 onwards.” This leaves car production between May and July 31 (and likely beyond!) unaccounted for in the recall. My car was built in August 2024, likely with a battery manufactured prior to July 31, 2024 with the defect. I believe my car should be included in the recall/affected vehicles given its production date and the date of production remedy. I accessed the recall report here: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The high-voltage battery system in my 2023 Mercedes-Benz EQB 250+ is subject to NHTSA Recall 26V-073, the third recall issued for the same battery cell defect. The manufacturer has acknowledged that the two prior recall remedies (25V-050 and 25V-894, both software-based Battery Management System updates) were "failed remedies" that did not eliminate the risk of internal short circuit and thermal event (fire). The manufacturer has instructed all affected owners to park the vehicle outdoors and away from any structure and to limit charging to 80% state of charge until a full battery pack replacement can be performed. The battery replacement parts are not expected to be available until approximately December 2026 — roughly 9 months from the date of this complaint. These restrictions create a significant safety risk and loss of use for my household. I have a newborn infant and no viable outdoor parking option. The vehicle cannot be safely parked in my garage per the manufacturer's own instructions due to fire risk. My spouse cannot safely park away from our residence and transport an infant on foot. The vehicle was previously brought to an authorized Mercedes-Benz dealership for prior recall-related service. The underlying battery cell defect — attributed by the manufacturer to deviations in the supplier (Farasis Energy) production process — has not been resolved despite multiple repair attempts. The high-voltage battery is available for inspection upon request. No warning lamps or messages appeared prior to the recall notification. The defect is an internal cell-level issue that may cause thermal runaway without warning, whether the vehicle is parked, charging, or in operation. Two confirmed fire incidents among affected vehicles in the United States have been reported to NHTSA. I am requesting that this complaint be documented to support the record of this recurring, unresolved safety defect affecting approximately 11