# 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: 11036516
- Published by NHTSA: 2026\-09\-01
- Manufacturer's number: LI27.60\-P\-076554
- Manufacturer's date: 2026\-08\-26
- 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 software application causing elevated K81/K27/B05 fill time adaptations and elevated torque adaptations for concerning shift. Note: Shift quality in E Performance models can be affected if the HV Battery state of charge \(SOC\) reaches 25% or below. Remedy Check VGS software level, and follow relevant remedy instructions. \(see attachment\) AMG 43 models with VGS software levels up to 22A: As of 4/18/2025, an aftersales software improvement has been released. This software has been implemented in production as of model year 2024, however this LI should still be followed if the concern is present. 232 ‑ A0009025699 206 ‑ A0009025599 Please ensure your Xentry machine is up to date with the latest Add Ons and continue with the following steps: Note: ALL steps must be performed to rectify concern 1. Perform software update all control units included in VGS software update. 2. Check transmission oil level and correct, if necessary \(transmission oil temperature \> 60 °C\) 3. Perform Xentry Valve Flushing procedure at least 3x 4. Perform resetting of deceleration values \(VGS \> Special Procedures \> Special procedure \> Resetting learned values Deceleration mode\) 5. Perform a standstill adaptation, then read out new EEPROM data 6. Perform driving adaptation\(s\) while adhering to the below parameters for at least 20‑30 miles. 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 6‑7 \(adapts B05 for the 2‑3 shift\) Harsh 3‑4 Perform a driving adaptation of 3‑4 \(adapts K27 directly\) ‑ See attached PDF for min/max torque, and RPM parameters ‑ Transmission oil temperature \> 30°C \(\>86°F\) ‑ Level track \(no incline/decline\) ‑ Slippery drive program ‑ Display the torque in the instrument cluster ‑ Constant engine torque ‑ Do not shift via paddle AMG 63 models with VGS software levels up to 22A: No aftersales software resolution is planned. Perform above steps and release the vehicle. If the vehicle returns and already had ALL steps in this LI performed on a previous visit, or has software level 23A and newer: 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 \(before any adaptations or Xentry procedures were performed\) ‑ Detailed vehicle history of the complaint

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036516-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036516-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2016 to 2023 MERCEDES\-BENZ AMG C43
- 2022 to 2023 MERCEDES\-BENZ AMG SL63
- 2025 MERCEDES\-BENZ AMG SL63
- 2023 to 2025 MERCEDES\-BENZ AMG SL63 4MATIC\+
- 2024 to 2025 MERCEDES\-BENZ AMG SL63 S E
- 2024 to 2025 MERCEDES\-BENZ AMG SL63 S E PERFORMANCE 4MATIC\+
- 2017 to 2025 MERCEDES\-BENZ C 300

JSON: [/v1/bulletins/11036516](/v1/bulletins/11036516)

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