GF82.85-P-3008QM Data Transfer Between COMAND and Instrument Cluster Function

GF82.85-P-3008QM Data Transfer Between COMAND And Instrument Cluster Function
- with CODE (527) COMAND APS (with navigation)


Operation of the COMAND operating, display and control unit (A40/3) from the multifunction steering wheel (MFL)
With the aid of the multifunction steering wheel (MFL) buttons and the multifunction display (A1p13) of the instrument cluster (A1), the following systems controlled by the COMAND operating, display and control unit (A40/3) can be operated and information on the systems called up:
^ Audio systems (e.g. radio, CD changer, etc.)
^ Navigation system
^ Telephone system

The entire data exchange between the instrument cluster (A1) and the COMAND operating, display and control unit (A40/3) takes place via the Controller Area Network bus class B (interior) (CAN- B).

All buttons pressed on the multifunction steering wheel (MFL) are read in by the instrument cluster (A1) straight away as voltage coded. The instrument cluster (A1) links these signals with the system (audio, navigation, telephone) currently displayed on the multifunction display (A1p13). This interpretation is necessary because the operation of the buttons depends on the current content of the multifunction display (A1p13). The interpreted data is subsequently put onto the CAN-B by the instrument cluster (A1) and received by the COMAND operating, display and control unit (A40/3). Changing the system on the multifunction display (A1p13) does not affect the display on the screen of the COMAND operating, display and control unit (A40/3), however changing the display on the screen of the COMAND operating, display and control unit (A40/3) does affect the multifunction display (A1p13).

The instrument cluster (A1) receives the current time from the COMAND operating, display and control unit (A40/3) since this information is automatically received via global positioning system (GPS).