Component Description For Sound System Amplifier Control Unit - GF82.62-P-5010GWM

Model 463 (except 463.342)

as of model year 2019

with code EU8 (Burmester® surround sound system)

Fig 1: Sound System Amplifier Control Unit Components Location - Model 463 (Except 463.342) As Of Model Year 2019 With Code EU8

Courtesy of MERCEDES-BENZ USA

Location

The sound system amplifier control unit is located behind the left side wall trim in the load compartment.

Tasks

The sound system amplifier control unit has the following tasks:

Receive signals
Signal optimization and amplification
Transmitting signals

Receive signals

The input factors are read in via:

Media Oriented System Transport (MOST)
Direct lines

MOST

The sound system amplifier control unit also receives the following signals over MOST:

Control and audio signals from the head unit (A26/17)
Audio parameters (e.g. volume, sound) from the head unit
Control and audio signals fro the TV tuner control unit (N143) (with code EM8 (TV tuner))
Interior noise level signals from the driver hands-free system microphone (B25/20) and from the front passenger hands-free system microphone (B25/21) over the head unit for the speed-dependent volume control (SDV)
Speed signal from head unit, for speed-dependent volume control

Direct lines

The following signals are read in via a direct line:

Audio muting (mute LIN) from HERMES control unit (N112/9) (with code EK1 (HERMES LTE communication module) or code EM2 (HERMES UMTS communication module))
Electrical wake-up

Signal optimization and amplification

Optimization of input signals through digital signal processing and sound optimization algorithms (Surround Sound, Easy Listening, Live, 3D Sound)
Support of stereo and multichannel entertainment channels and announcement channels (e.g. for voice output in voice control system or navigation prompts)
Amplifying of the input signals and assignment of the output to the speakers

Transmitting signals

The sound system amplifier control unit emits the audio signals at the following speakers:

Left front door midrange speaker (H4/1)
Right front door midrange speaker (H4/2)
Left rear door midrange speaker (H4/3)
Right rear door midrange speaker (H4/4)
Left instrument panel tweeter (H4/33)
Right instrument panel tweeter (H4/34)
Left rear door tweeter (H4/35)
Right rear door tweeter (H4/36)
Left rear subwoofer (H4/42)
Left rear midrange speaker for surround sound system (H4/62)
Right rear midrange speaker for surround sound system (H4/63)
Left front door woofer (H4/88)
Right front door woofer (H4/89)
Left front center overhead control panel midrange speaker (3D sound) (H4/115)
Right front center overhead control panel midrange speaker (3D sound) (H4/116)

Function

The sound system amplifier control unit is actuated via the head unit. The head unit also provides all of the menus for user guidance. The software update and diagnosis communication also occur via the head unit.

For the optimized SDV, the sound system amplifier control unit evaluates the speed signal and noise level in the vehicle interior over the driver hands-free system microphone and front passenger hands-free system microphone.

Sound amplifier control unit wiring diagram

PE82.62-P-2101-97ZHA