Mercedes-Benz AMG C43 2021–2025 — technical service bulletin

Bulletin OTA-Comm. Mod. SW. Update · NHTSA communication 11038222 · issued Sep 25, 2026

Technical service bulletin

communication type

Electrical System

component

2021–2025

model years

vehicle entries

Official summary

A software update will be performed that provides enhancements to the robustness and system stability of the communication module. The update is free of charge and runs in the background, which takes about 8 minutes to install. During this time, the vehicle can be driven without any restrictions, and the new software will be active with the next ignition cycle. Remedy MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customer’s vehicle free of charge and do not require a dealer visit.

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.