# Service bulletin LI27.60\-P\-076554

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11017593
- Published by NHTSA: 2025\-05\-02
- Manufacturer's number: LI27.60\-P\-076554
- Manufacturer's date: 2025\-04\-28
- NHTSA component: POWER TRAIN

## NHTSA's 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

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11017593-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11017593-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Transmission and driveline

## Vehicles listed

- 2023 to 2024 MERCEDES\-BENZ AMG C43
- 2023 MERCEDES\-BENZ AMG C43 4MATIC
- 2023 to 2024 MERCEDES\-BENZ AMG SL43

JSON: [/v1/bulletins/11017593](/v1/bulletins/11017593)

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