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Service bulletin LI54.21-N-071993

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10184789
Published by NHTSA2020-12-28
Manufacturer's numberLI54.21-N-071993
Manufacturer's date2020-11-18
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT

NHTSA's summary

Malfunctions in vehcile in connection with parameterization special module. Errors in PSM may cause fualts. Disconnect PSM and perform SCN coding.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Equipment and accessories, Transmission and driveline, Automatic transmission, Transmission control module

Vehicles listed
MERCEDES ROYALE SPRINTER COACH2015 to 2017

Listing a model year does not mean every vehicle of it is concerned: the document says which.