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

GF82.60-P-2003TXB Volume/Tone Adjustments, Function
- with CODE (511) Audio 50 APS with DVD changer
- with CODE (525) MB Audio 50 APS radio

General information
All volume and tone settings are made using the radio control panel and navigation unit (A2/56). 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:
^ Function sequence for general volume setting via the left multifunction steering wheel button group (S110) or the right multifunction steering wheel button group (S111)
^ Function sequence for general volume setting using the rotary switch of the radio control panel and navigation unit
^ Function sequence for general, extra tone settings using the control buttons of the radio control panel and navigation unit
^ Function sequence for speed-dependent volume control

The radio control panel and navigation unit comes not only with the general tone settings such as bass, treble, balance and fader, it also is equipped with extra tone settings. For vehicles with code 810 Sound system via the Pro Logic 7 function.

Operating instructions
The volume can be set as follows:
- Using the buttons + and - for setting specific functions and volume control (S111s1) on the multifunction steering wheel (MFL)
- Using the rotary switch of the radio control panel and navigation unit

The tone can be set as follows:
- Using the rotary switch and control buttons on the radio control panel and navigation unit

Function requirements
^ Status "Circuit 30 ON" or "Circuit 15R ON"
^ The Auto pilot system (APS) is working correctly
^ Audio source in operation

Function sequence for general volume setting using the multifunction steering wheel button group
Pressing the + and - button for setting specific functions and volume control enables the volume for the desired audio function to be increased or reduced.
The control signals are forwarded via the following path to the radio control panel and navigation unit:
- Steering Local Interconnect Network (LIN)
- Steering column tube module (N80)
- Controller Area Network bus Class C (engine compartment) (CAN-C)
- Instrument cluster (A1)
- Controller area network bus, class B (interior compartment) (CAN B)

Function sequence for general volume setting using the rotary switch of the radio control panel and navigation unit
The radio's rotary switch can be used to set the volume. The signal path is then an internal one.

Function sequence for general, extra tone settings using the control buttons of the radio control panel and navigation unit
The control buttons can be used on the radio control panel and navigation unit to manually set the tone (bass, treble, balance, fader as well as tone options) for each audio source.
The required tone settings can be performed via the "Sound" menu. They can be adjusted separately for each function (e.g. Compact Disk (CD), radio reception, traffic announcements).

The volume and tone settings are displayed on the screen of the radio control panel and navigation unit. The tone 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. Vehicles with code 810 Sound system are also equipped with the Pro Logic 7 tone option. The control signals are read in and evaluated within the radio control panel and navigation unit.

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 radio control panel and navigation unit raises or lowers the output level of the audio signals (speed-dependent volume control).

The vehicle speed signal is forwarded to the radio and navigation unit via the following path:
- Instrument cluster
- CAN-B