On April 17, 2026, my 2026 Mercedes-AMG GT Coupe experienced a sudden and complete electrical failure while operating on a public roadway in Texas. The vehicle lost propulsion and became completely disabled in active traffic during dusk/nighttime conditions. All electrical systems failed simultaneously, including lighting and hazard lights. The vehicle could not be restarted, moved, or recharged roadside and was effectively “bricked.” This created a serious safety hazard because the vehicle was stranded in traffic with no hazard lights or electrical warning systems available to alert surrounding vehicles. Police officers responded to protect the vehicle and occupants due to the dangerous roadway location. Due to the low ride height/body configuration of the vehicle, a specialized tow truck was required, causing the disabled vehicle to remain exposed in traffic for more than five hours. The vehicle was finally removed around 11:00 PM and transported to a Mercedes-Benz service center. Mercedes-Benz service documentation confirmed: Internal failure involving the 12V battery system Consequential overload/failure of the 48V system Multiple diagnostic trouble codes Vehicle shutdown conditions The vehicle and components are available for inspection upon request. The condition was confirmed and inspected by Mercedes-Benz technicians and police officers at the scene. Prior to the total failure, dashboard warning messages and malfunction alerts had appeared. After repairs including replacement of the 12V and 48V systems, the vehicle again displayed warning messages on May 7, 2026: “Cooling System Malfunction – Reduced Drive Power – Service Required.” Because this warning resembled the precursor symptoms before the original total shutdown event, the vehicle was immediately returned to the same Mercedes-Benz service center to prevent another dangerous roadway failure.

Source: NHTSA complaint ODI #11736380 · view all complaints for this vehicle at nhtsa.gov