LEMON Manuals: Even more car manuals for everyone
Home >> Mercedes Benz >> 2012 >> GL350 >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Electrical System - Body - 164 Chassis - 4 Of 8 >> Basic Knowledge >> Volume/tone adjustments, function >> Volume/tone adjustments, function - GF82.60-P-2003GQB

Volume/tone adjustments, function - GF82.60-P-2003GQB

MODEL 164.1 with CODE (523) MB Audio 20 radio as of model year 09/YoM 08 model refinement package 

MODEL 164.1 with CODE (510) Audio 20 with CD changer as of model year 09/YoM 08 model refinement package 

MODEL 164.8 with CODE (523) MB Audio 20 radio as of model year 09/YoM 08 

MODEL 164.8 with CODE (510) Audio 20 with CD changer as of model year 09/YoM 08 

MODEL 251.0 with CODE (523) MB Audio 20 radio as of model year 09/YoM 08 

MODEL 251.0 with CODE (510) Audio 20 with CD changer as of model year 09/YoM 08 

MODEL 251.1 with CODE (523) MB Audio 20 radio as of model year 09/YoM 08 

MODEL 251.1 with CODE (510) Audio 20 with CD changer as of model year 09/YoM 08 

Function requirements 

General 

All volume and tone settings are performed using the radio (A2). This is accomplished either by the user or automatically by the radio with the aid of the speed-dependent volume control (SDV [GAL]). The volume and sound setting function can be conducted as follows:

IMPORTANT Along with the general tone settings the radio can also control, e.g. bass, treble, balance and faders, over extended tone settings.

These are:

Operating instructions 

The volume can be adjusted with the following components:

The sound settings can be made with the following components:

Function sequence, general volume setting via right multifunction steering wheel button group 

Pressing the + and - button for setting specific functions and volume control increases or reduces the volume for the required audio function.

The control signals are forwarded via the following path to the radio:

After evaluating the control signals, the desired settings on vehicles with code (810) Sound system are transmitted, over the Media Oriented System Transport (MOST), to the sound system amplifier (N40/3) and then output on the following speakers:

IMPORTANT The audio signal for the subwoofer speaker travels via MOST from the radio to the sound system amplifier and from there, over the subwoofer amplifier (N40/9), via discrete lines, to the Subwoofer speaker.

IMPORTANT On vehicles, except code (810) Sound system, the selected settings are processed internally, amplified and output to the following speakers:

Function sequence for general volume setting and general, extended tone settings over the control buttons and radio rotary actuators 

Operating the radio's rotary actuator enables the volume to be raised or lowered for the desired audio function. Pressing the "Tone setting" button on the radio, enables the user to make all the general or extended tone settings. The control signals are read in and evaluated within the radio. On vehicles with code (810) Sound system, the desired settings are transferred via the MOST to the sound system amplifier and then output to the following speakers:

IMPORTANT The audio signal for the subwoofer speaker travels via MOST from the radio to the sound system amplifier and from there, over the subwoofer amplifier, via discrete lines, to the subwoofer speaker.

IMPORTANT On vehicles, except code (810) Sound system, the selected settings are processed internally, amplified and output to the following speakers:

Function sequence for speed-dependent volume control 

The speed-dependent volume control can be used to adapt the volume to the noise level in the vehicle interior. The speed signal from the instrument cluster is used as a reference value for this function. The speed signal is transferred to the radio via the following route:

This procedure will run automatically. After evaluating the relationship indicator, the audio output is matched to the noise level in the vehicle interior.

Depending on the vehicle speed signal, the radio raises or lowers the output level of the audio signals.

On vehicles with code (810) Sound system, the output signals are transferred via the MOST to the sound system amplifier and then output to the following speakers:

IMPORTANT The audio signal for the subwoofer speaker travels via MOST from the radio to the sound system amplifier and from there, over the subwoofer amplifier, via discrete lines, to the subwoofer speaker.

IMPORTANT On vehicles, except code (810) Sound system, the selected settings are processed internally, amplified and output to the following speakers:

REFER TO SYSTEM WIRING DIAGRAMS Electrical function diagram for volume/sound settings, function Model 164 PE82.60-P-2059-97MAA
Model 251 PE82.60-P-2059-97RAA
  Instrument cluster, component description A1 GF54.30-P-6000GM
  Radio control panel, component description A2
With code (523) MB Audio 20 radio		 GF82.60-P-3116GQ 
A2
With code (510) Audio 20 with CD changer		 GF82.60-P-3116GQA 
  Sound system amplifier, component description N40/3
With code (810) Sound system		 GF82.62-P-6003GQS
  Component description for the steering column module control unit N80 GF54.21-P-6051GM
scientia non olet · About LEMON Manuals