Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz vehicles, has determined that on certain...

Bulletin number

NCU-2021060009

Component

Electrical system

Summary

Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 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 vehicle may not start during initial start-up (ECO start-stop system is not affected). o OBD monitoring functionality may not become active for the battery control unit coolant temperature. What We’re Doing MBUSA will conduct an Emission Service Campaign. An authorized Mercedes-Benz dealer will perform a software update on the 48V battery management system for the affected vehicles. Affected customers will be notified via First Class letter to have the update performed on their vehicle.

Owners of these vehicles have filed 38 complaints in the electrical category.