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

MODEL 166 as of model year 2016 

with CODE 810 (Sound system) 

except CODE 811 (Advanced sound system) 

MODEL 292 

with CODE 810 (Sound system) 

except CODE 811 (Advanced sound system) 

Shown on MODEL 292 

Location 

The sound system amplifier control unit is located under the left front 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 via direct lines:

• Circuit 30
• Circuit 30g
• Circuit 31
• Wake-up signal for MOST
• Muting of 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 of 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:

• Center instrument panel speaker (H4/27)
• Left front door sound system tweeter (H4/68)
• Right front door sound system tweeter (H4/69)
• 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)
• Left rear surround speaker (H4/62)
• Right rear surround speaker (H4/63)
• Rear woofer (H4/38)

Sound amplifier control unit wiring diagram

PE82.62-P-2101-97NBA