gf8262p9900a

Speaker system, basic function

Type gf · topic 82.62 · version 0106 · 2020-06-19

Applies to: Model all (CAR)

Where it sits

Function group 3 Body › 82 Electrical system, body › 82.62 Loudspeakers, amplifiers, antennas — Series 900 (models 9**) · Series 902 (models 9**) · Series 904 (models 918, 919, 924, 925, 938, 943, 957) · Series 906 (models 917, 918, 924, 953)

EinPAS 31 Communication/information/entertainment › 31.75 Audio playback/audio output › 31.75.1 Basic information — Series 900 (models 9**) · Series 902 (models 9**) · Series 904 (models 918, 919, 924, 925, 938, 943, 957) · Series 906 (models 917, 918, 924, 953)

Also applies to engines/gearboxes: 139 ***, 254 ***, 256 ***, 272 ***, 276 ***, 282 ***, 457 9**, 541 9**, 542 9**, 608 ***, 700 4**, 700 420, 700 421, 700 422, 700 423, 715 3**, 715 5**, 722 6**, 722 9**, 724 ***, 724 0**, 724 033, 724 044, 724 045, 724 1**, 724 103, 724 114, 724 115, 724 120, 725 ***, 725 0**, 725 035, 725 037, 725 038, 725 085, 725 1**, 739 390, 739 391, 739 395, 739 396, 739 397, 739 398, 739 399, 740 698, 743 3**, 743 4**, 743 498, 746 971, 924 9**, 924 910, 925 9**, 926 9**

GF82.62-P-9900A

Speaker system, basic function

04.06.2020

Model

all (CAR)

Overview

This document contains information on:

Function of the speaker system

Restricted speaker actuation

Actuation of the speakers during an emergency call

Support of communication in the vehicle (dependent on model and equipment installed)

General

The task of the speaker system is to output the audio information from various systems via the speakers in the vehicle. Sources for the audio information can be the radio, media or the telephone, for example. Depending on the equipment installed, the speaker system is controlled either by the multimedia system control or by the sound system amplifier control unit.

Function of the speaker system

Each source converts the audio information into analog audio signals. Then an amplifier amplifies the analog audio signals and transmits them to the speakers. Depending on the equipment installed, the amplifier is either integrated in the multimedia system control or is installed in the vehicle as an independent control unit.

The subwoofer amplifier is optionally used. This additionally amplifies the analog audio signals to the rear subwoofer.

Each speaker is optimized for its tasks, e.g. according to the various frequency ranges. The speakers installed differ in terms of quality, number and installation location depending on the model and equipment level.

The user can adjust the volume and tone of the speaker system using the multimedia system. When an emergency call is triggered, the telematics services control unit mutes the audio sources.

Restricted speaker actuation

During voice output, the amplifiers primarily actuate the speakers in the front area of the vehicle.

Actuation of the speakers during an emergency call

For the emergency call system, the center instrument panel speaker is connected directly to the telematics services control unit. This means that the function of the emergency call is assured independently of the speaker system.

In addition, the telematics services control unit transmits a signal with the request for the mute function to the sound system amplifier control unit or to the multimedia system control.

Support of communication in the vehicle (dependent on model and equipment installed)

In some vehicles entertainment to all the seat rows can be made easier with acoustic support. To achieve this, the speaker system also outputs the words spoken in one seat row in the speakers assigned to the other seat row.

In the basic variant, the hands-free system microphones records what is spoken in the front seats and the speakers in the rear emit the signals too. This means that what is spoken in the first seat row can also be heard better in the second seat row. With the maximum equipment, additional microphones are fitted in the rear, so that communication between the seat rows can be supported in both directions by the speaker system.

The function is switched on and off using the multimedia system control. Different volume levels can also be selected to support communication.

Function schematics

Function schematic for actuating speakers

Model 118, 177 except engine 139, model 247

PE82.62-P-2501-97A

Model 118, 177 with engine 139

PE82.62-P-2501-97D

Model 167

PE82.62-P-2501-97B

Model 213, 238, 257 as of model year 2021

PE82.62-P-2501-97E

Model 238 as of model year 2021

PE82.62-P-2501-97F

Model 293

PE82.62-P-2501-97C

Further basic functions

Volume adjustment to noise level, basic function

GF82.60-P-1000A

Engine sound, basic function

Vehicles with sporty engine sound and vehicles with code 97B (Engine noise reduction via speakers (EOC))

GF82.60-P-9901A

Radio mode,basic function

GF82.60-P-9902A

Media mode,basic function

GF82.60-P-9903A

TV mode, basic function

Model all (CAR)
with code 865 (digital TV)

GF82.60-P-9904A

Telephone, basic function

GF82.70-P-9902A

Multimedia system control, basic function

GF82.85-P-9904A

Emergency call system, basic function

Model all (CAR)
with code 362 (HERMES communications module LTE)

GF82.95-P-9900A

Control units

Sound system amplifier control unit, basic function

Vehicles with code 810 (Premium sound system) or code 811 (with high-end sound system), Vehicles with code 97B (Engine noise reduction via speaker (EOC)) and AMG vehicles with engine 139, 256

GF82.62-P-9890A

Components

Subwoofer amplifier, basic function

Model all (CAR)
with code 811 (High-End sound system)
Model all (CAR)
with code 853 ("Midline" sound system)

GF82.62-P-9891A

Referenced documents