Mercedes-Benz S 500 2021 — technical service bulletin
Bulletin 2021070021 · NHTSA communication 10205820 · issued Aug 20, 2021
Technical service bulletin
communication type
Unknown / Other
component
2021
model years
3
vehicle entries
Official summary
Important new emission service campaign information.
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.