Mercedes-Benz S 500 2022–2023 — technical service bulletin
Bulletin LI91.16-P-076098 · NHTSA communication 10235672 · issued Apr 4, 2023
Technical service bulletin
communication type
Seats
component
2022–2023
model years
7
vehicle entries
Official summary
Complaint When driving on a rough road, there may be noises from the foldable head restraints of the front seats. The noise is not present at the limit stops (head restraint entirely retracted or entirely extended) Cause The head restraint has increased play between the worm and the gearwheel in the head restraint mechanics. Remedy Check play/noise (see video attachment, headrest OK/headrest not OK). Please exchange the head restraint in the event of a not OK result. Cause The head restraint has increased play between the worm and the gearwheel in the head restraint mechanics. Remedy Check pla
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.