FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.
Home >> Mercedes Benz >> 2011 >> E 350 BLUETEC (212.024) V6-3.0L DSL Turbo (642.850) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Radio, Stereo, and Compact Disc >> Description and Operation >> GF82.60-P-2003FL Volume/Tone Adjustments, Function

GF82.60-P-2003FL Volume/Tone Adjustments, Function



GF82.60-P-2003FL Volume/Tone Adjustments, Function

Function requirements for volume/tone settings, general
^ Circuit 30g ON

Depending on the equipment version, one of the following audio devices is installed (hereinafter called "Audio equipment"):
- Radio (A2) (with code (523) MB Audio 20 radio or with code (510) Audio 20 with CD changer)
- Radio with auto pilot system (A2/56) (with code (525) MB Audio 50 APS radio or with code (511) Audio 50 APS with DVD changer)
- COMAND controller unit (A40/3) (with code (527) COMAND APS with single DVD drive (with navigation) or with code (512) COMAND APS with DVD changer or with code (528) COMAND incl. DVD changer)

Volume/tone adjustments, general
All volume and tone settings are performed using the audio equipment. This is performed either manually by the user (only volume) or automatically by the speed-dependent volume control (SDV [GAL]). The volume and sound setting function can be conducted as follows:
^ Function sequence for general volume setting and general, extended tone settings over the left multifunction steering wheel button group (S110) or the right multifunction steering wheel button group (S111)
^ Function sequence for general volume setting and general, extended tone settings via the control buttons and audio equipment rotary actuator
^ Function sequence for general volume setting and general, extended tone settings over the Audio/COMAND control panel (A40/9)
^ Function sequence for speed-dependent volume control

On vehicles with code (810) Sound system, the audio equipment also has - in addition to the general sound settings such as bass, treble, balance and fader - the sound setting surround sound: Logic 7(R) on or off.

The volume and tone settings can be made using the following components:
- With the left multifunction steering wheel button group or the right multifunction steering wheel button group
- With the audio equipment rotary switch
- Using the Audio/COMAND control panel

Function sequence for general volume setting and general, extended sound settings using the left multifunction steering wheel button group or the right multifunction steering wheel button group
Pressing the + and - button for adjustment of specific functions and volume control (S111s1) enables the volume for the desired audio function to be increased or reduced. The general or extended sound settings are performed by selecting the "Tone" menu with the left multifunction steering wheel button group or right multifunction steering wheel button group.

The control signals are forwarded to the audio equipment via the following route:
- Direct line
- Steering wheel electronics (N135)
- Steering LIN (LIN E1)
- Steering column module control unit (N80)
- Chassis CAN (CAN E)
- Instrument cluster (A1)
- Interior CAN (CAN B)

Once the control signals have been evaluated, the required settings are transmitted to the sound system amplifier control unit (N40/3) via Media Oriented System Transport (MOST) in vehicles with code (810) Sound system and then amplifier The audio output takes place over the following speakers:
- Center dashboard speaker (H4/27)
- Left rear surround speaker (H4/54)
- Right rear surround speaker (H4/55) (with model 212.2)
- Right rear surround speaker (H4/57) (with model 212.0)
- Left front door sound system tweeter (H4/68)
- Right front door sound system tweeter (H4/69)
- Left rear door sound system tweeter (H4/70)
- Right rear door sound system tweeter (H4/71)
- Left front door sound system midrange and bass speakers (H4/72)
- Right front door sound system midrange and bass speakers (H4/73)
- Left rear door sound system midrange speaker (H4/80)
- Right rear door sound system midrange speaker (H4/81)

For the bass speaker (H4/17) (model 212.0) or for the bass speaker (H4/29) (model 212.2), the audio signal is routed from the "audio equipment" to the sound system amplifier control unit via MOST and from there to the bass speaker via the rear bass speaker amplifier (N40/9) using direct lines.

On vehicles without code (810) Sound system, the audio signals are output directly by the audio equipment to the following speakers:
- Left front door speaker (H4/1)
- Left front door tweeter (H4/1h1)
- Right front door speaker (H4/2)
- Right front door tweeter (H4/2h1)
- Left rear door speaker (H4/3)
- Left rear door tweeter (H4/3h1)
- Right rear door speaker (H4/4)
- Right rear door tweeter (H4/4h1)

Function sequence for general volume setting and general, extended tone settings via the control buttons and audio equipment rotary actuator
Operating the audio equipment's rotary actuator enables the volume to be raised or lowered for the desired audio function. Pressing the "Tone" button on the audio equipment enables the user to make all the general or extended tone settings. The control signals are read in and evaluated within the audio equipment. The desired settings for vehicles with code (810) Sound system are sent over MOST to the sound system amplifier control unit and then emitted at the speaker system.

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

Function sequence for general volume setting and general, extended tone settings over the Audio/COMAND control panel
Selecting the "Tone" menu via the Audio/COMAND control panel enables general or, with code (810) Sound system, extended tone settings to be made. The control signals of the Audio/COMAND control panel are forwarded to the audio equipment via the telematics CAN (CAN A).

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 vehicle speed signal is used as a relationship indicator by the instrument cluster when doing this. 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 audio equipment raises or lowers the output level of the audio signals. The signal flow in vehicles without code (810) Sound system is as follows:
- Instrument cluster
- Interior CAN
- Audio equipment
- Direct line
- Speaker system [LS]

For vehicles with code (810) Sound system, the signal flow is as follows:
- Instrument cluster
- Interior CAN
- Audio equipment
- MOST
- Sound system amplifier control unit
- Speaker system [LS]




pro multis Credits:Operation CHARM About Operation CHARM