2021 MERCEDES-BENZ AMG GLC63 Complaints

This 2021 Mercedes-Benz GLC 63 AMG has experienced repeated and escalating warranty defects involving engine performance, loss of acceleration, air suspension failure, and now inoperative advanced safety systems including blind spot and active brake assist. Despite numerous repair attempts at authorized dealerships, including extensive engine teardown and cylinder head replacement, the manufacturer has been unable to permanently repair the vehicle. The car has been out of service for 145 cumulative days to date and continues to exhibit safety-related failures. It is currently back at the dealership for service. The vehicle therefore qualifies as a lemon and the owner seeks statutory relief in the form of a buyback and compensation. Please see the attached invoices for additional details and timeline below. Service Repair Timeline 2023 ? Air suspension diagnostics & component replacement Dec 5, 2023 (1 day) Invoice #160689 2024 ? Loss of acceleration ? Vehicle enters limp mode ? Fuel pressure sensor replaced ? Multi-day service hold ? Recurrent suspension malfunction ? "Do not drive over 50 mph" warnings ? Valve block / fuse / compressor diagnostics ? Check Engine Light ? Rough running ? Misfire cylinder 2 ? Ignition coils, plugs, injector replaced ? Vehicle held for extended diagnostics ? Compression loss discovered ? Valve seat damage ? Cylinder head removal & replacement ? Extensive engine teardown ? Vehicle out of service 103 consecutive days March 22, 2024-March 29, 2024 (8 days) Invoice #162719 March 29, 2024-April 11, 2024 (14 days) Invoice #162840 April 28, 2024-May 1, 2024 (4 days) Invoice #163306 May 2, 2024-August 12, 2024 (103 days) Invoice #289050 August 21, 2024-August 30, 2024 (8 days) Invoice #292684 August 28, 2024 (1 day) Invoice #292920 October 8, 2024 (1 day) 2026 ? Recurrent warnings ? Check Engine Light ? Blind Spot Assist inoperative ? Active Brake Assist limited ? Recurrent suspension malfunction (3rd time) ? "Do not drive over 50 mph" warning

The contact owns a 2021 Mercedes-Benz AMG GLC63. The vehicle was taken to the local dealer for routine maintenance, and the contact was informed that there was an issue with the ignition coil. There was a misfire coming from the engine. The dealer determined that the ignition coil needed to be replaced. The vehicle was not repaired. Upon investigation, the contact linked the failure to Technical Service Bulletin: 2021070006. The manufacturer was contacted and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 65,000.