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

GF82.60-P-2003RCB Volume/Tone Adjustments, Function
- with CODE (527) COMAND APS with single DVD drive (with navigation)
- with CODE (512) COMAND APS with DVD changer
- except CODE (498) Japan version

Function requirements
^ Status "Circuit 30 ON"
^ The Cockpit Management and Data System (COMAND) switched on and audio source in operation

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:
^ General function sequence for volume adjustment on right multifunction steering wheel button group (S111)
^ Function sequence, general volume adjustment and general, expanded tone settings over control buttons and rotary actuator on COMAND operating, display and controller unit
^ Function sequence for speed-dependent volume control

In addition to the general tone settings such as bass, treble, balance, the COMAND operating, display and controller unit is equipped with the tone option "Pro Logic 7" surround sound in vehicles with code (810) Sound system.

Operating instructions
The volume/tone settings can be made using the following components:
- The + and - buttons for setting specific functions and volume control (S111s1) on the multifunction steering wheel (MFL)
- Using the rotary switch of the COMAND operating, display and controller unit

Function sequence, general volume setting via right multifunction steering wheel button group
By pressing the + and - button, for setting specific functions and volume control, the volume for the desired audio function is increased or decreased.
The control signals are routed to the COMAND operating, display and controller unit over the following path:
- Steering LIN
- Steering column tube module (N80)
- Interior CAN

The tone settings are indicated 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 tone settings (bass, treble, balance, as well as tone options) to be set manually by means of the rotary actuator for each audio source. The required tone settings can be performed via the "Sound" 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.

If the sound emphasis is changed (balance), the volume relationship between the individual speakers changes relative to each other. The desired settings in vehicles with code (810) Sound system are transmitted to the amplifier for sound system via Media Oriented System Transport (MOST). The Pro Logic 7 tone option will then also be available

For vehicles except 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. Depending on the vehicle speed signal, the COMAND operating, display and controller unit raises or lowers the output level of the audio signals.

The COMAND operating, display and controller unit receives the vehicle speed signal in the following way:
- Instrument cluster (A1)
- Interior CAN

In vehicles with code (810) Sound system, the audio signals are output by the COMAND operating, display and controller unit to the amplifier for sound system (N40/3) via the MOST and from there, via direct lines to the following speakers:
- Left door speaker group (H4/1)
- Right door speaker group (H4/2)
- Left rear speaker (H4/7)
- Right rear speaker (H4/8)
- Center cockpit speaker (centerfill) (H4/27)
- Left door tweeter (H4/33)
- Right door tweeter (H4/34)
- Left rear surround speaker (H4/54)
- Right rear surround speaker (H4/57)

On vehicles except code (810) Sound system, the audio signals and data are output by the COMAND operating, display and controller unit over direct lines to the following speakers:
- Left door speaker group
- Right door speaker group
- Left rear speaker
- Right rear speaker
- Center cockpit speaker (centerfill)
- Left door tweeter
- Right door tweeter