# Service bulletin LI27.00\-P\-080462

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: 11033634
- Published by NHTSA: 2026\-06\-05
- Manufacturer's number: LI27.00\-P\-080462
- Manufacturer's date: 2026\-06\-04
- NHTSA component: POWER TRAIN

## NHTSA's summary

Complaint Harsh upshifts, downshifts, or jolting in lower gears when accelerating. Cause Incorrectly installed \(rotated\) rotational speed sensors on the EHS \(VGS Control Unit\) can cause abnormalities in signals. As a result, poor adaptation values are stored and harsh gearshifts are felt. This only affects vehicles with VGS control units produced between days 185\-296 of 2025 \(July 4, 2025\-October 23, 2025\). Remedy If the production date is or is within 25185\-25296 \(07/4/25\-10/23/25\): As of 5/29/2026, IPR has been updated to recognize these cases and advise replacement of the VGS Control Unit. Please ensure your XENTRY has all the latest Addons installed before proceeding. It is possible to check the production date of the VGS through the EEPROM .txt file \(Figure 1\) or on the VGS hardware \(Figure 2\). 1. Perform IPR and and perform the recommended replacement of the VGS Control Unit IMPORTANT: When performing this replacement, it is necessary to transfer the old control unit data to the new replacement via XENTRY. \- Click the hyperlink in the IPR results page to perform this step without a password. \(Figure 3\) \- If the hyperlink is not followed, a TIPS case will be required to receive the necessary password. \- Follow WIS instructions and ensure o\-ring beneath control unit is installed. \(Figure 4\) \- Use the same Xentry machine that collected the original control unit data for the new control unit initial start up If the production date is outside of this range: This LI is not applicable. 1. Perform IPR and follow recommended instruction

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033634-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11033634-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2019 to 2024 MERCEDES\-BENZ AMG G63
- 2021 to 2022 MERCEDES\-BENZ AMG GLE63 S
- 2023 to 2024 MERCEDES\-BENZ AMG GLE63 S 4MATIC\+
- 2025 MERCEDES\-BENZ AMG GLE63 S 4MATIC\+ COUPE
- 2021 to 2022 MERCEDES\-BENZ AMG GLE63 S COUPE
- 2020 to 2022 MERCEDES\-BENZ AMG GLS63
- 2023 to 2025 MERCEDES\-BENZ AMG GLS63 4MATIC\+
- 2024 to 2025 MERCEDES\-BENZ GLE 580 4MATIC
- 2024 to 2025 MERCEDES\-BENZ GLS 580 4MATIC
- 2021 MERCEDES\-MAYBACH GLS 600
- 2022 to 2025 MERCEDES\-MAYBACH GLS 600 4MATIC
- 2023 to 2024 MERCEDES\-MAYBACH S 680
- 2022 to 2023 MERCEDES\-MAYBACH S 680 4MATIC
- 2025 to 2026 MERCEDES\-MAYBACH S 680 4MATIC

JSON: [/v1/bulletins/11033634](/v1/bulletins/11033634)

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