# Service bulletin LI27.60\-P\-079083

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: 11023043
- Published by NHTSA: 2025\-09\-09
- Manufacturer's number: LI27.60\-P\-079083
- Manufacturer's date: 2025\-09\-08
- NHTSA component: POWER TRAIN

## NHTSA's summary

Complaint • Harsh 1\-2, 2\-3, and/or 3\-4 shift • Jerky shifting • Jolting when accelerating from stop Cause Insufficient powertrain software Remedy Please continue with the following: 1. Check transmission oil level and correct, if necessary \(transmission oil temperature \> 60 °C\) 2. Perform Xentry Valve Flushing procedure at least 3x 3. Perform a standstill adaptation, then read out new EEPROM data If the concern is still present: 4. Perform driving adaptation\(s\) below 5x for harsh gear shift using the following criteria: Note: There is no menu in Xentry for this procedure. We recommend displaying the torque in the instrument cluster. If all below parameters are met at the time the shift, a driving adaptation will automatically occur. Harsh 1\-2 Perform a driving adaptation of 4\-5 \(adapts K81 for the 1\-2 shift\) Harsh 2\-3 Perform a driving adaptation of 2\-3 \(adapts B05 directly\) Harsh 3\-4 Perform a driving adaptation of 3\-4 \(adapts K27 directly\) \- Level track \(no incline/decline\) \- Slippery drive program \- Display the torque in the instrument cluster: The torque must be between 100 and 250 Nm \(about 184 ft lbs\), preferably closer to the maximum torque \- Constant engine torque \- Engine speed below 2500 rpm \- Do not shift via paddle If the concern still persists, please submit a TIPS case to the Powertrain inbox and ensure the following is included: \- Initial Quick Test w/ Freeze Frame Data \- VGS Control Unit Log \- Initial EEPROM \(before any adaptations or Xentry procedures were performed\) \- EEPROM data after all driving adaptations

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11023043-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11023043-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2024 MERCEDES\-BENZ AMG GLC43
- 2024 to 2025 MERCEDES\-BENZ AMG GLC43 4MATIC COUPE

JSON: [/v1/bulletins/11023043](/v1/bulletins/11023043)

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