Mercedes-Benz AMG CLS53 2021 — technical service bulletin
Bulletin NCU-2021060009 · NHTSA communication 10225802 · issued Oct 7, 2022
Technical service bulletin
communication type
Electrical System
component
2021
model years
9
vehicle entries
Official summary
Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (â MYâ ) 2021 GLE/GLS-Class, E-Class, E-Class Coupe/Convertible, CLS-Class and AMG GT (167, 213, 238, 257 and 290 platforms) vehicles, the 48V battery management system software might not meet specifications which could potentially result in one or more of the following circumstances: o Audible tone, and alternating malfunction warning messages in the instrument cluster for Transmission Malfunction, 48V, 12V, and/or the coolant temperature followed by reduced engine output. o The ve
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.