Mercedes-Benz GLS450 electrical problems
16 complaint narratives mention electrical terms.
Key facts
70 owner complaints analyzed
20 distinct recall campaigns
13,000 mi median reported failure mileage
Scope: 2016 to 2021 model years. Data snapshot: . 21 complaints include usable failure mileage.
Electrical and battery issues evidence
16 of 70 complaints match this topic (22.9%). The keyword filter can include complaints that mention a transmission without reporting its failure. View matching rules.
Owner report 11646348 · 2025-03-04 (March 4, 2025)
Vehicle check engine light came on early August 2024. Vehicle was brought in for service and checked for codes. B1F4500 Battery has excessive resistance B21059A The operating conditions of component have not been satisfied. Battery was replaced and rechecked. Po4427A Evap leak detected P04F000 Charcoal canister has a malfunction Smoke tested EVAP system to see if there was any leaks and tested the valves to make sure EVAP system was working correctly. Charcoal canister not actuating correctly so was replaced and checked. Gas cap also rep…
Owner-reported narrative. Look up ODI 11646348 at NHTSA ↗
Owner report 11695525 · 2025-10-24 (October 24, 2025)
My 2017 Mercedes-Benz GLS 450 is experiencing serious and unpredictable transmission behavior related to the valve body and shifting mechanism. The transmission sometimes fails to engage Park, shifts on its own without driver input or attempts to engage Reverse unexpectedly. On multiple occasions the vehicle has moved or rolled after being placed in Park and once it appeared to shift itself toward Reverse. This behavior is a clear safety risk as the vehicle can suddenly lose control or move unexpectedly. It happens intermittently, without any …
Owner-reported narrative. Look up ODI 11695525 at NHTSA ↗
Owner report 11710906 · 2026-01-14 (January 14, 2026)
The contact owns a 2017 Mercedes-Benz GLS450. The contact heard an abnormal humming sound when the vehicle was started, and the humming sound grew louder over time. The contact believed that the humming sound was coming from the driver's side headlamp. The contact stated that the headlamp was equipped with a small internal fan to dissipate heat. Additionally, other electrical failures were occurring, and the vehicle was taken to a local dealer. The dealer diagnosed the vehicle and determined that the blower motor had failed and needed to be rep…
Owner-reported narrative. 135,500 miles reported. Look up ODI 11710906 at NHTSA ↗
Owner report 11288497 · 2019-12-11 (December 11, 2019)
DRIVING ON FREEWAY AT ̃75MPH TOWARD 202 W ARIZONA FREEWAY, DASHBOARD SHOWED A "ENGINE MALFUNCTION + 48 V BATTERY SEE OPERATOR'S MANUAL:. 1 MINUTE LATER ANOTHER ERROR ON SCREEN SAYING, COOLANT OFF TURN ENGINE OFF. THEN THE CAR LOST THE POWER IN THE MIDDLE LANE OFF FREEWAY. LUCKILY NO CARS BEHIND US. CAR IN SERVICE AT MERCEDES DEALER IN CHANDLER AZ
Owner-reported narrative. 13,000 miles reported. Look up ODI 11288497 at NHTSA ↗
Owner report 11442482 · 2021-12-02 (December 2, 2021)
The car would not start and could not be jumped. I'm told it's the 48V battery has to be replaced. I have seen on the internet numerous people have the same problem and that a large batch of these 48V batteries are the problem. Error message displays stop the vehicle and more details advises battery is malfunctioning and do not continue driving.
Owner-reported narrative. Look up ODI 11442482 at NHTSA ↗