Mercedes-Benz AMG C43 2022–2026 — technical service bulletin
Bulletin LI54.30-P-078529 · NHTSA communication 11036105 · issued Aug 10, 2026
Technical service bulletin
communication type
Electrical System
component
2022–2026
model years
16
vehicle entries
Official summary
Complaint During cold starting, a tortoise symbol may be displayed in the event of reduced engine output. For "non-hybrid vehicles", the thermostat symbol must be displayed. Cause Coding N133/1 IC Instrument cluster Remedy Perform N133/1 IC-Instrument-Cluster manual coding.
Vehicles covered
- 2023 Mercedes-Benz AMG C43
- 2024 Mercedes-Benz AMG C43
- 2023 Mercedes-Benz AMG C43 4MATIC
- 2024 Mercedes-Benz AMG C43 4MATIC
- 2025 Mercedes-Benz AMG C43 4MATIC
- 2026 Mercedes-Benz AMG C43 4MATIC
- 2022 Mercedes-Benz C 300
- 2023 Mercedes-Benz C 300
- 2024 Mercedes-Benz C 300
- 2025 Mercedes-Benz C 300
- 2026 Mercedes-Benz C 300
- 2022 Mercedes-Benz C 300 4MATIC
- 2023 Mercedes-Benz C 300 4MATIC
- 2024 Mercedes-Benz C 300 4MATIC
- 2025 Mercedes-Benz C 300 4MATIC
- 2026 Mercedes-Benz C 300 4MATIC
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.