Mercedes-Benz C-Class 2011–2012 — technical service bulletin
Bulletin 40-P-053536 · NHTSA communication 10044220 · issued Apr 20, 2012
Technical service bulletin
communication type
Seat Belts
component
2011–2012
model years
3
vehicle entries
Official summary
Mercedes benz: right front seat belt or left front seat belt does not roll up completely. Caused by belt strap scraping on the retractor housing. Also included model cls550 model year 2012. *js
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.