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

Model 166

as of model year 2016

with code 811 (High-End sound system)

except code 810 (Premium sound system)

Model 292

with code 811 (High-End sound system)

except code 810 (Premium sound system)

Shown on MODEL 292

Fig 1: Sound System Amplifier Control Unit Components Location - Model 166 As Of Model Year 2016 With Code 811 (Shown On Model 292)

Courtesy of MERCEDES-BENZ USA

Location

In model 292 and in model 166.0, the sound system amplifier control unit is located in the trunk at the right rear in the spare wheel well.

In model 166.8, the sound system amplifier control unit is located in the trunk at the left rear in the spare wheel well.

Tasks

The sound system amplifier control unit has the following tasks:

Receive signals

The input signals are read in via the following connections:

Direct lines

The sound system amplifier control unit receives the following signals via direct lines:

Power supply via circuit 30 and circuit 31 via one direct line each
Wake-up signal for MOST
Signals from sound system microphone (B25/6)
Muting of the audio sources (with code 348 (Emergency call/Assist system), with code 350 (eCall Europe emergency call system) or with code 06U (Mercedes connect me basic services) or with code 351 (Emergency call system (HERMES)))

Media Oriented System Transport (MOST)

The sound system amplifier control unit is a MOST subscriber and receives the following signals, among others:

Audio signals from audio equipment
Audio signals from the tuner unit (A90/4) (with code 536 (SIRIUS satellite radio), with code 537 (Digital radio (DAB)) or with code 865 (TV tuner))
Audio parameters (e.g. volume, sound) and speed signal for the speed-dependent volume control (SDV) from the audio equipment

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 (Bang & Olufsen)
Supporting of 2 stereo entertainment channels and 3 announcement channels
Amplifying decoded audio signals

Transmitting signals

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

Center instrument panel speaker (H4/27)
Left front door speaker, mirror triangle (H4/23)
Right front door speaker, mirror triangle (H4/24)
Left front door midrange speaker (H4/86)
Right front door midrange speaker (H4/87)
Left front door woofer (H4/88)
Right front door woofer (H4/89)
Left rear door speaker (H4/3)
Right rear door speaker (H4/4)
Left rear door tweeter (H4/35)
Right rear door tweeter (H4/36)
Rear woofer (H4/38)
Left rear surround speaker (H4/62)
Right rear surround speaker (H4/63)

The sound system amplifier control unit controls the illumination of the following speakers:

Function

For optimized speed-dependent volume control (SDV), the sound system amplifier control unit evaluates the following signals:

Sound amplifier control unit wiring diagram