LI82.27-P-072402
Service Bulletin Details
Public Details for: LI82.27-P-072402
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 wi
Models from 2021
Models from 2020
Model series 167 - Humming noise emitted by speakers Topic number LI82.27-P-072402 Version 1 Function group 82.27 - Engine sound system Date 2/19/21 Validity Model series 167 equipped with M256 engine Reason for change Complaint 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. Cause Current sound amp (N40/3) software release Remedy 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 Symptoms Power generation > Engine noise > Noise Power generation > Engine noise > Malfunction, sound generator Power generation > Exhaust system > Noises > Noise Chassis/suspension > Noises > Humming/droning/throbbing Communication/information > Entertainment > Audio/Sound > Speakers emit interference noise Operation numbers/damage codes Op. no. Operation text 19.02.2021 21:40:09 © Copyright Mercedes-Benz AG Time CTENORE Damage code Note Page 1 / 1