Mercedes-Benz AMG C43 2021–2024 — technical service bulletin
Bulletin Ll54.10-P-076896 · NHTSA communication 10243306 · issued Sep 8, 2023
Technical service bulletin
communication type
Electrical System
component
2021–2024
model years
60
vehicle entries
Official summary
12V message in IC when starting the vehicle. SW updates need to be performed. Follow the guided test for FC U116000 in N73/3*1 EIS CU. Perform the SW checks and updates. Fully charge both 12V and 48V batteries. After, perform a few drive/park cycles with at least 1 overnight park cycle. If the 12V message is no longer present, release the vehicle.
Vehicles covered
- 2022 Mercedes-Benz AMG C43
- 2023 Mercedes-Benz AMG C43
- 2024 Mercedes-Benz AMG C43
- 2022 Mercedes-Benz AMG C63 S
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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.