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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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10189406
Published by NHTSA2021-03-29
Manufacturer's numberLI82.27-P-072402
Manufacturer's date2021-02-22
NHTSA componentBACK 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

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Driver assistance, Backup camera

Vehicles listed
MERCEDES-BENZ AMG GLC632020
MERCEDES-BENZ C 3002020 to 2021
MERCEDES-BENZ C 3502020
MERCEDES-BENZ C 350 E2020
MERCEDES-BENZ CLA 2502020 to 2021
MERCEDES-BENZ CLS 4502020 to 2021
MERCEDES-BENZ E 3502020 to 2021
MERCEDES-BENZ E 350 E2021
MERCEDES-BENZ E 4502020 to 2021
MERCEDES-BENZ GLC 3002020 to 2021
MERCEDES-BENZ GLC 3502020
MERCEDES-BENZ GLC 350 E2020 to 2021
MERCEDES-BENZ GLE 3502020 to 2021
MERCEDES-BENZ GLE 350 E2020 to 2021
MERCEDES-BENZ GLE 4502020 to 2021
MERCEDES-BENZ GLE 5802020 to 2021
MERCEDES-BENZ GLS 4502020
MERCEDES-BENZ GLS 580 4MATIC2020
MERCEDES-BENZ GLS4502021
MERCEDES-BENZ GLS5802021

Listing a model year does not mean every vehicle of it is concerned: the document says which.