Mercedes-Benz C 300 2019–2020 — technical service bulletin
Bulletin PSC2021060013 · NHTSA communication 10202534 · issued May 21, 2021
Technical service bulletin
communication type
Power Train
component
2019–2020
model years
5
vehicle entries
Official summary
Update Coding of Powertrain Control Unit.
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.