Mercedes-Benz AMG C43 2022–2024 — technical service bulletin
Bulletin LI54.30-P-078529 · NHTSA communication 11009125 · issued Oct 23, 2024
Technical service bulletin
communication type
Electrical System
component
2022–2024
model years
6
vehicle entries
Official summary
Complaint During cold starting, a tortoise symbol may be displayed in the event of reduced engine output. (see attachment) For "non-hybrid vehicles", the thermostat symbol must be displayed. (see attachment) Cause SCN Coding of the N133/1 IC-Instrument-Cluster Remedy Perform N133/1 IC-Instrument-Cluster manual SCN coding.
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.