Mercedes-Benz AMG S63 2021–2022 — service campaign
Bulletin NCU - 2025090003 · NHTSA communication 11023207 · issued Sep 19, 2025
Service campaign
communication type
Power Train
component
2021–2022
model years
8
vehicle entries
Official summary
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the software for the powertrain control unit (PTCU) does not correspond to the current series production configuration. The possibility exists that a control unit timeout may occur followed by malfunction indicator lamp (MIL) activation. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the PTCU software in the affected vehicles.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.