Mercedes-Benz AMG S63 2021 — technical service bulletin
Bulletin OTA - Update Com Mod SW · NHTSA communication 11037429 · issued Sep 11, 2026
Technical service bulletin
communication type
Electrical System
component
2021
model years
5
vehicle entries
Official summary
Issue On certain subject vehicles, software for the communication module does not meet the current series production configuration. A software update will be implemented which will provide robustness enhancements and system stabilization measures for the communication module. Remedy MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customer’s vehicle free of charge and do not require a dealer visit.
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.