Mercedes-Benz AMG C43 2023–2024 — technical service bulletin
Bulletin Emissions - 2025040001 · NHTSA communication 11020009 · issued Jun 12, 2025
Technical service bulletin
communication type
Electrical System
component
2023–2024
model years
12
vehicle entries
Official summary
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the engine control software might not meet current specifications. As a result, the diagnosis routine for monitoring the air-fuel ratio might not be activated as intended and a malfunction in the oxygen sensor could be erroneously detected causing the “check engine” Malfunction Indicator Lamp (‘MIL’) to illuminate. MBUSA will conduct a voluntary emissions recall. An authorized Mercedes-Benz dealer will update the engine control unit software.
Vehicles covered
- 2023 Mercedes-Benz AMG C43
- 2024 Mercedes-Benz AMG C43
- 2023 Mercedes-Benz AMG C43 4MATIC
- 2023 Mercedes-Benz AMG C63 S
- 2023 Mercedes-Benz AMG C63 S E
- 2024 Mercedes-Benz AMG C63 S E
- 2023 Mercedes-Benz AMG G63
- 2024 Mercedes-Benz AMG G63
- 2023 Mercedes-Benz C 300
- 2024 Mercedes-Benz C 300
- 2023 Mercedes-Benz G 550
- 2024 Mercedes-Benz G 550
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.