Mercedes-Benz AMG C43 2023–2024 — technical service bulletin

Bulletin OTA - 05022025 · NHTSA communication 11018890 · issued May 3, 2025

Technical service bulletin

communication type

Electrical System

component

2023–2024

model years

vehicle entries

Official summary

Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the ignition lock (EZS) control unit does not correspond with the latest series production configuration. The EZS control unit will receive an OTA software update which will improve the performance of hands-free access on the affected vehicles. 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.