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

Model 463

as of model year 2013 up to model year 2019

with code EU9 (Harman Kardon® Logic 7® surround sound system)

Shown: Model 463.236

Fig 1: Sound System Amplifier Control Unit Components Location - Model 463 As Of Model Year 2013 Up To Model Year 2019 With Code EU9 (Shown: Model 463.236)

Courtesy of MERCEDES-BENZ USA

Location

The sound system control unit is located beneath the front left seat.

Tasks

The sound system amplifier control unit has the following tasks:

Receive signals
Decoding, supporting and amplifying signals
Transmitting signals

Receive signals

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

Direct lines
Media Oriented System Transport (MOST)

Direct lines

The sound system amplifier control unit receives the following signals:

Power supply over circuit 31 and circuit 30g over one direct line each
Mute function signal (Muting the audio sources) from the HERMES control unit (N112/9) (with code EK1 (HERMES - LTE communications module) or code EM2 (HERMES - UMTS communications module)) or from the emergency call system control unit (N123/4) (with code ZU8 (USA national version) up to 31.08.2016)
Electrical wake-up

Media Oriented System Transport (MOST)

The sound system amplifier control unit is a MOST subscriber and receives e.g. audio signals from the following components:

COMAND controller unit (A40/3)
Tuner unit (A90/4) (with code EF6 (Digital radio (DAB)), code EM8 (TV tuner), code ZJ1 (Version for Japan) or code ZU8 (USA national version) as of 01.09.2016)
Digital TV tuner (A90/3) (with code EM8 (TV tuner) or with code ZJ1 (Version for Japan) up to 31.08.2016)
Digital Audio Broadcasting control unit (N87/3) (with code EF6 (Digital radio (DAB)) up to 31.08.2016)
Satellite Digital Audio Radio (SDAR) control unit (N87/5) (with code ZU8 (USA national version) up to 31.08.2016)
Media interface control unit (N125/1) (with code EH3 (Media Interface) up to 31.08.2016)

Decoding, supporting and amplifying signals

Signal conditioning in the sound system amplifier control unit encompasses the following aspects:

Decoding of copy-protected audio signals based on Digital Signal Processing (DSP) technology
Supporting surround sound
Supporting of stereo entertainment channels and announcement channels
Amplifying decoded audio signals

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 rear surround speaker (H4/7)
Right rear surround speaker (H4/8)
Center instrument panel speaker (H4/27)
Woofer (H4/29)
Left instrument panel tweeter (H4/33)
Right instrument panel tweeter (H4/34)
Left rear door tweeter (H4/35)
Right rear door tweeter (H4/36)

Sound amplifier control unit wiring diagram

PE82.62-P-2101-97ZGA