Mercedes-Benz AMG C43 2022–2026 — technical service bulletin

Bulletin LI27.60-P-079969 · NHTSA communication 11025536 · issued Nov 5, 2025

Technical service bulletin

communication type

Power Train

component

2022–2026

model years

vehicle entries

Official summary

Complaint Harsh 2-1 downshifts when coming to a stop with ECO start-stop function turned OFF. Note: When ECO start-stop is active, the engine is shut off before the 2-1 shift and the complaint will not occur. Cause Software application when engine is running. Remedy Short-term remedy: Perform IPR and follow the instruction to perform standstill adaptations. Long-term Solution: Aftersales software is currently in development. NOTE: The information contained in this document is intended for use by trained, professional technicians with the knowledge to properly and safely perform diagnosis and r

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.