# Service bulletin LI82.27\-P\-072402

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: 10189406
- Published by NHTSA: 2021\-03\-29
- Manufacturer's number: LI82.27\-P\-072402
- Manufacturer's date: 2021\-02\-22
- NHTSA component: BACK OVER PREVENTION

## NHTSA's summary

If the exhaust flap is operated or the drive program is changed within 10 seconds of the engine being started, an audible humming noise may emit from the speakers. New sound amp \(N40/3\) software is currently in development. This document will be updated once it is released. Meanwhile, avoid toggling the drive program or the exhaust flap with 10 seconds of an engine start to avoid the possibility of the complaint occurring. Note: Do not replace any parts as this will not remedy the complaint

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10189406-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10189406-9999.pdf)

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

## Components

Driver assistance, Backup camera

## Vehicles listed

- 2020 MERCEDES\-BENZ AMG GLC63
- 2020 to 2021 MERCEDES\-BENZ C 300
- 2020 MERCEDES\-BENZ C 350
- 2020 MERCEDES\-BENZ C 350 E
- 2020 to 2021 MERCEDES\-BENZ CLA 250
- 2020 to 2021 MERCEDES\-BENZ CLS 450
- 2020 to 2021 MERCEDES\-BENZ E 350
- 2021 MERCEDES\-BENZ E 350 E
- 2020 to 2021 MERCEDES\-BENZ E 450
- 2020 to 2021 MERCEDES\-BENZ GLC 300
- 2020 MERCEDES\-BENZ GLC 350
- 2020 to 2021 MERCEDES\-BENZ GLC 350 E
- 2020 to 2021 MERCEDES\-BENZ GLE 350
- 2020 to 2021 MERCEDES\-BENZ GLE 350 E
- 2020 to 2021 MERCEDES\-BENZ GLE 450
- 2020 to 2021 MERCEDES\-BENZ GLE 580
- 2020 MERCEDES\-BENZ GLS 450
- 2020 MERCEDES\-BENZ GLS 580 4MATIC
- 2021 MERCEDES\-BENZ GLS450
- 2021 MERCEDES\-BENZ GLS580

JSON: [/v1/bulletins/10189406](/v1/bulletins/10189406)

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