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-2003GQJ

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

MODEL 164.1 with CODE (527) COMAND APS with single DVD drive (with navigation) with CODE (498) Japan version as of model year 2009/YoM 08 model refinement package 

MODEL 164.8, 251.0/1 with CODE (527) COMAND APS with single DVD drive (with navigation) with CODE (498) Japan version as of model year 2009/YoM 08 

Function requirements 

General 

All volume and tone settings can be made on the COMAND operating display and controller unit (A40/3). This is performed either by the user or automatically by the speed-dependent volume control (SDV [GAL]). The volume and sound setting function can be conducted as follows:

IMPORTANT In addition to the general tone settings such as bass, treble, balance and fader, the COMAND operating, display and controller unit on vehicles with code (810) Sound system also have the "Logic 7" surround sound function.

IMPORTANT As of 1.7.09: With audio source "Aux" (via media interface adapter cable (with code (518) Media Interface) or standard aux socket), selection "Standard" and "Boost" is possible under the "Volume" menu. The input level is increased by selecting "Boost".

The volume/tone settings can be made using the following components:

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

Pressing the + and - buttons for setting specific functions and volume control enables the volume for the desired audio function to be increased or reduced.

The control signals are routed to the COMAND operating, display and controller unit via the following route:

IMPORTANT The current tone settings are shown on the display of the COMAND operating, display and controller unit. The volume setting can be carried out separately for each audio source. Predefined settings can be selected and reset to the manufacturer default setting via the system settings.

Function sequence, general volume adjustment and general, expanded tone settings over control buttons and rotary actuator on COMAND operating, display and controller unit 

The COMAND operating, display and controller unit allows the volume and tone settings (bass, treble, balance, fader and tone options) to be set manually for each audio source with the rotary actuator. The required tone settings can be made using the "Tone" menu. They can be set separately for each function (e.g. CD, radio reception, traffic announcements). The control signals are read in and evaluated within the COMAND operating, display and controller unit. The desired settings are transferred to the amplifier for sound system (N40/3) via the Media Oriented Transport System (MOST) in vehicles with code (810) Sound system, and vehicles with code (810) Sound system also have the "Logic 7" surround sound option.

If the tone emphasis is changed (balance, fader) the volume relationship between the individual speakers changes relative to each other.

IMPORTANT For vehicles without code (810) Sound system, the selected settings are processed internally, amplified and then emitted at the speaker system.

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. In this case, the vehicle speed signal is used as the reference value. This procedure will run automatically. After evaluating the relationship indicator, the audio output is matched to the noise level in the vehicle interior.

The COMAND operating, display and controller unit increases or decreases the output level of the audio signals (GAL) depending on the vehicle speed signal. The vehicle speed signal travels to the COMAND operating, display and controller unit via the following route:

On vehicles with code (810) Sound system, the audio signals are output by the COMAND operating, display and controller unit via the MOST to the amplifier for the sound system and from there, over direct lines, at the following speakers:

IMPORTANT The audio signal for the subwoofer speaker (H4/29) travels from the COMAND operating, display and controller unit to the sound system amplifier via MOST and from there, over direct lines, to the subwoofer amplifier (N40/9) and then to the subwoofer speaker.

On vehicles without code (810) Sound system, the audio signals are output by the COMAND operating, display and controller unit via direct lines to the following speakers:

REFER TO SYSTEM WIRING DIAGRAMS Electrical function diagram for volume/sound settings, function Model 164 PE82.60-P-2059-97MAD
Model 251 PE82.60-P-2059-97RAD
  Instrument cluster, component description A1 GF54.30-P-6000GM
  Component description for COMAND operating, display and controller unit A40/3 GF82.85-P-3134GQJ
  Sound system amplifier, component description N40/3
With code (810) Sound system		 GF82.62-P-6003GQS
  Component description for steering column tube module control unit N80 GF54.21-P-6051GM
scientia non olet · About LEMON Manuals