Mercedes-Benz S 560 2021 — technical service bulletin
Bulletin P-SC-2021020005 · NHTSA communication 10189412 · issued Feb 5, 2021
Technical service bulletin
communication type
Vehicle Speed Control
component
2021
model years
3
vehicle entries
Official summary
Update Left and Right Front and Rear Door Control Unit Software
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.