Brief description of components

The M-ASK obtains signals from the following components:

• CON: Controller 

  The controller delivers the signals for selecting the menus and submenus. The submenus are selected by turning and/or pushing the controller.

• Telephone 

  The telephone delivers the signal for the radio mute circuit and the low-frequency output signal to transmit the call to the loudspeakers. The two signals are transmitted via the MOST bus. Other information can also be transmitted by the telephone.

• CD changer or DVD changer 

  The CD changer or DVD changer (optional) supplies the low-frequency output signals to actuate the output stages.

  The CD changer or DVD changer is connected to the MOST bus.

• Aerials 

  The aerials (e.g. rear window aerial, roof-mounted aerial, rod antenna, aerial in the spoiler, side-window aerial) supply the signals for radio reception and for the remote control.

• GPS aerial 

  The GPS aerial receives signals from GPS satellites. The signals to the GPS receiver and the navigation system are transmitted via the aerial cable to other connections.

• DSC: Dynamic Stability Control 

  DSC calculates the data for distance, speed and direction for the navigation system.

• Navigation DVD 

  The navigation DVD supplies the data to the Central Information Display (CID) for the map display and for calculating the distance.

• Wheel-speed sensors 

  The wheel-speed sensors deliver the signals for the distance, speed and direction (forwards and backwards) for calculation in the DSC control unit.

• SZL: Steering column switch cluster 

  The SZL delivers the steering angle signal for the navigation system.

• Multi-function steering wheel 

  The multi-function steering wheel houses the buttons for volume and station selection. The push-to-talk button activates/deactivates the voice recognition system.

The M-ASK consists of the following components:

• Housing 

  The size of the M-ASK corresponds to that of a radio DIN housing.

• Drive 

  Depending on the design, the M-ASK is equipped with the following drives:

  • CD drive for playback of audio CDs.
  • CD-ROM drive for playback of audio CDs.
  • DVD drive for loading data for the navigation system and for playback of audio CDs.
• Aerial tuner 

  Depending on the design, the M-ASK is equipped with the following tuners:

  • Single-tuner radio for reception of VHF, MW and LW radio frequencies.
  • Two-tuner radio for reception of the strongest FM station. The traffic message channel (TMC) receives information that is used by the navigation system to avoid traffic jams (with option 606).
• M-ASK motherboard (M-ASK-H) 

  The M-ASK motherboard is connected to the processor board. There are memories and processors on both boards which function as individual control units.

• Aerial diversity 

  The aerial diversity contains the aerial amplifier and switches over the aerials to FM.

• Electric fan 

  An electric fan for cooling the audio output stages and the processors can be found on the back of the 1 DIN radio casing.

The M-ASK outputs the following signals:

• KOMBI: Instrument cluster 

  The instrument cluster is used to display Check-Control messages.

• CID: Central Information Display 

  The following functions can be displayed on the CID:

  • On-board info (with option 606 is displayed as menu navigation)
  • Entertainment
  • Communication
  • Climate
  • Settings
• Audio operation 

  The following signals can be output via the loudspeakers:

  • Audio signals
  • Parking aid (PDC: Park Distance Control)
  • Audible signals (jingles), e.g. signals during Check-Control messages