My 2021 Mercedes-Benz AMG GT 43, VIN [XXX] , has had a recurring safety issue with the transmission wiring harness and connector X279. Mercedes-Benz said this connector can let water in, which can cause a short circuit, overheating, and a fire risk while the car is parked and off. That is why the vehicle was covered by recall 24V445 / MBUSA Campaign 2024100002. This same issue was already addressed once before in January 2023 under MBUSA Campaign 2022080010 / NHTSA 22V-533, when the connector was checked and reworked and a bracket was installed. Even after that, the car later had to go back again on November 29, 2024 for the newer recall repair, when the original two-part harness was replaced with a one-part harness. The part that concerns me most is that this is not just a routine repair issue. It is a fire risk that can happen while the vehicle is parked with the ignition off. I am also concerned that the recall and service records do not clearly show the exact completion date in the manufacturer’s system. I am asking NHTSA to record this complaint and review the defect history and repair history for this vehicle. I can provide the recall notices, service records, purchase contract, vehicle history report, and the notice I already sent to Mercedes-Benz USA. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Source: NHTSA complaint ODI #11739859 · view all complaints for this vehicle at nhtsa.gov

AVAILABLE FOR INSPECTION UPON REQUEST ISSUE WAS REPRODUCED AT DEALESHIP. ISSUE IS EASY TO IDENTIFY. VEHICULE WAS INSPECTED BY DEALERSHIP, MANUFACTURER IS AWARE. FAULT LIGHT ON DASHBOARD SHOW A FAULT ICON THE 2021 AMG GT BLACKSERIES HAVE AN ACTIVE REAR WING. A PART OF THE ACTIVE REAR WING IS ACTIVE BUT HAS A HIGH FAILURE WHICH AT SOME SPEEDS CAN BE DANGEROUS BECAUSE THE ACTIVE PART IS NOT WORKING AND DO NOT PROVIDE THE DOWNFORCE THAT IT SHOULD BECAUSE OF THE ACTATOR FAILURES. THERE ARE A HIGH NUMBERS OF REPLACEMENT REQUESTED THROUGHT THE MERCEDES NETWORK BUT THEY ARE BEING REPLACED BY THE SAME PART # NOT AN UPDATED ONE TO AVOID FAILURES. SOME OWNERS DO NOT HAVE A REPLACEMENT DUE TO NONE IN STOCKS. THE 2021 IS UNDER WARRANTY BUT AMG MERCEDES HAS NOT , YET, INFORMED OWNERS OF THE POTENTIAL HAZARD. THE ACTIVE PART OF THE REAR WING WHEN FAILED IS SIMPLY NOT RESPONSIVE (NOT MOVING ACCORDING TO SPEEDS OR BRAKING ACTIONS). PLEASE REVIEW THE ISSUE BEFORE SOMEONE GETS HURT. THANK YOU

Source: NHTSA complaint ODI #11660293 · view all complaints for this vehicle at nhtsa.gov