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

Model 213 with engine 177 as of model year 2019 up to model year 2021 except code 810 (Premium sound system) except code 811 (High-End sound system)

Model 213 with engine 256 as of model year 2019 up to model year 2021 with code M016 (Uprated engine) except code 810 (Premium sound system) except code 811 (High-End sound system)

Fig 1: Sound System Amplifier Control Unit Components Location - Model 213 From Year 2019 Up To 2021, Engine 177 Except Code 810;811, Engine 256 With Code M016 Except Codes 810; 811

Courtesy of MERCEDES-BENZ USA

Shown on model 213.0

Location

The Midline sound system amplifier control unit is located in the left of the trunk behind the side trim.

Tasks

Receive signals
Signal optimization and amplification
Transmitting signals

Receive signals

The input factors are read in via:

Direct lines
Media Oriented System Transport (MOST)
CAN interface

Direct lines

The following signals are read in via a direct line:

Power supply via circuit 30t and circuit 31
Audio muting (Mute function) from the HERMES control unit (N112/9) (with code 362 (HERMES LTE))
Electrical wake-up

Media Oriented System Transport (MOST)

The Midline sound system amplifier control unit is a MOST user and receives control and audio signals from the following component parts:

Head unit (A26/17)
TV tuner control unit (N143) (with code 865 (TV tuner))

CAN interface

The Midline sound system amplifier control unit receives control signals (e.g. engine rpm, engine load and vehicle speed) over the drive CAN (CAN C1) from the ME-SFI [ME] control unit (N3/10)

Signal optimization and amplification

The Midline sound system amplifier control unit has the following tasks when it is optimizing and amplifying the signals:

Optimization of input signals through digital signal processing
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
Optimization of the engine and exhaust system sound in the vehicle interior through generation of simulated sound components through the speaker system

Transmitting signals

The Midline sound system amplifier control unit sends signal tones and amplified, optimized audio signals to the following speakers over direct lines:

Left front door midrange speaker (H4/1) and left front door tweeter (H4/33)
Right front door midrange speaker (H4/2) and right front door tweeter (H4/34)
Left rear door midrange speaker (H4/3) and left rear door tweeter (H4/35)
Right rear door midrange speaker (H4/4) and right rear door tweeter (H4/36)
Center instrument panel speaker (H4/27)
Left front footwell bass speaker (H4/42)
Right front footwell bass speaker (H4/43)

Sound amplifier control unit wiring diagram

PE82.62-P-2101-97DBC