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April 28, 2025 Service bulletin

• Hard 1-2 shift • Jerky shifting • Jolting when moving off

Mercedes-Benz technical service bulletin LI27.60-P-076554 for 2023-2024 Mercedes-Benz AMG C43, 2023 Mercedes-Benz AMG C43 4matic and 2023-2024 Mercedes-Benz AMG SL43.

Bulletin number
LI27.60-P-076554
Component
Power train
Summary
Complaint • Hard 1-2 shift • Jerky shifting • Jolting when moving off Cause Insufficient data points for the adaptation limits algorithm Remedy A software bundle has been released. Please check for available software in the VGS Control Unit. Please carry out the following: • Update all control units included with VGS Control Unit software update • Check the transmission oil level and correct if necessary • Rinse the valves 3 times via XENTRY • Perform a stationary standstill adaptation • Collect EEPROM data If the problem persists, please perform driving adaptations of the 4-5 upshift (4-5 shift adapts K81 for 1-2) at least ten to fifteen times: • Level track (no incline/decline) • Slippery drive program • Display the torque in the instrument cluster: The torque must be between 100 and 250 Nm, preferably closer to the maximum torque • Constant engine torque • Engine speed under 2500 rpm • Do not shift via paddle • Collect a new EEPROM data after all adaptions are complete If the problem persists OR this is a return visit after the software update, please create a TIPS case with the following attachments: • Initial Quick Test w/ Freeze frame data • VGS Control Unit Log • All collected EEPROM files

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