Electrical complaints and recalls from NHTSA
Summary
The 2020 Mercedes-Benz GLS-Class has 15 NHTSA electrical complaints and 0 electrical-related recalls.
15
Complaints
0
Recalls
0
Injuries Reported
Data source: National Highway Traffic Safety Administration (NHTSA) · Last updated April 9, 2026
| Date ↓ | Component | Summary |
|---|---|---|
| Mar 8, 2026 | ELECTRICAL SYSTEM,FORWARD COLLISION AVOIDANCE,BACK OVER PREVENTION | The vehicle (2020 GLS 450) suffers from terminal infrastructure "Electronic Rot," resulting in a con... |
| Dec 14, 2025 | ELECTRICAL SYSTEM,ENGINE | The vehicle is experiencing deterioration of the main engine wiring harness insulation, resulting in... |
| Mar 25, 2025 | ELECTRICAL SYSTEM | The vehicle, 2020 Mercedes-Benz GLS450, was being backed out of the garage when an electrical failur... |
| Mar 7, 2025 | ELECTRICAL SYSTEM,ENGINE | I am writing to escalate an unresolved service issue with my 2020 Mercedes Benz GLS 450, VIN [XXX] .... |
| May 1, 2024 | ELECTRICAL SYSTEM | The dashboard screen stops working randomly. This is not related to extreme outdoor temp conditions.... |
| Dec 11, 2023 | ELECTRICAL SYSTEM | Vehicle would not start. 48v battery light came on. Waited 15 minutes, vehicle started, drove to dea... |
| Nov 25, 2023 | ELECTRICAL SYSTEM | While driving on the New Jersey Turnpike on November 17, 2023, a burning smell was noticed inside th... |
| Mar 1, 2023 | ELECTRICAL SYSTEM | I have noticed a significant issue with the AC vent system of my Mercedes GLS 450. The vents seem to... |
| May 11, 2022 | ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM | While driving, vehicle has abruptly stopped/engine turned off causing car to not accelerate and come... |
| Jan 6, 2022 | ELECTRICAL SYSTEM | MBUX Failure Customer sold MB GLS450 with all season MB Floor matts, Water on shoes drains on floor ... |
| Nov 2, 2021 | ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM | The vehicle warnign system displayed "48v Malfunction." Vehicke lost all acceleration in the middle... |
| Oct 4, 2021 | ELECTRICAL SYSTEM,UNKNOWN OR OTHER | Upon starting the car, the screen of the 2020 Mercedes Benz GLS 450 remained blank. This includes th... |
| Jun 15, 2021 | ELECTRICAL SYSTEM | The vehicle issued a “48v battery malfunction” and the car warned me not to drive the vehicle under ... |
| Mar 7, 2021 | ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM | WE PURCHASED A NEW 2020 MERCEDES BENZ GLS 450 IN OCTOBER 2019 FROM THE OAKLAND DEALERSHIP AND SHIPPE... |
| Jul 11, 2020 | ELECTRICAL SYSTEM | WHILE DRIVING THE VEHICLE, A SERIES OF ELECTRICAL SYSTEM WARNINGS WERE DISPLAYED IN RAPID SUCCESSION... |