Mercedes-Benz AMG S63 2021 — technical service bulletin
Bulletin 2021110003 · NHTSA communication 10203899 · issued Nov 12, 2021
Technical service bulletin
communication type
Electrical System
component
2021
model years
4
vehicle entries
Official summary
Update signal acquisition and actuation module front control unit software
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.