Data transfer between COMAND and instrument cluster function

P82.90-2005-06

Multifunction steering wheel controls

Model 220 up to 6/00

S110s1 Scroll forward/back button

S110s3 System selection button

S111s1 Pushbutton + and , setting of specific functions and volume control

S111s3 Accept/terminate phone call button

P82.90-2011-06

Multifunction steering wheel controls

Model 215 and 220 as of 6/00

S110s1 Scroll forward/back button

S110s3 System selection button

S111s1 Pushbutton + and , setting of specific functions and volume control

S111s3 Accept/terminate phone call button

COMAND operation on multifunction steering wheel

The following COMAND-controlled systems can be operated and information about the systems displayed with the aid of the multifunction display (A1p13) on the instrument cluster (A1) and the switches on the multifunction steering wheel:

 Audio

Radio, CD changer (optional), cassette player (up to 31.08.02)

 Navigation

 Telephone

 Television (TV) (optional)

 In vehicles from 01.09.03 onwards, the audio gateway control unit (N93/1) is also installed as interface between the class B (interior) Controller Area Network Bus (CAN-B) and the Media Oriented System Transport (MOST). The audio signals are then output via the vehicle speakers via the audio gateway control unit (N93/1).

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All communication between the instrument cluster (A1) and the COMAND operating, display and control unit (A40/3) takes place via CAN-B:

All button presses on the multifunction steering wheel are read in by the steering column module (N80) (voltage-coded).

The steering column module (N80) places the relevant messages on CAN-B.

The instrument cluster (A1) interprets the data using the systems (audio, radio, navigation, telephone) that are currently displayed on the multifunction display (A1p13).

This interpretation is necessary because the operation of the buttons depends on the content of the multifunction display (A1p13).

The interpreted data from the instrument cluster (A1) are now valid for the COMAND operating, display and control unit (A40/3).

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Control and display options on the multifunction display (A1p13):

Radio

Readout:

 Set frequency band and where applicable memory location number (e.g. FM1)

 Name (only for RDS stations) and frequency of station

 Information as to whether station search should take place using frequency or stored station list ("SP")

Control:

 Volume

 Station search with station list or frequency

CD changer (optional)

Readout:

 Number of CD currently playing

 CD track number

Control:

 Volume

 Selection of track

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Cassette drive up to 31.08.02

Readout:

 Cassette side currently playing

Control:

 Volume

 Rewind to start of current track

 Wind forward to next track

Navigation

Readout:

 Street vehicle is currently on

 Next street to turn off into

 Distance to next turn-off

 Turn-off arrow

Control:

 Volume of voice output

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Telephone

Readout:

 Request for entry of Personal Identification Number (PIN)

 Name of provider

 Vehicle outside transmit or receive range of telephone network

 Telephone number (if stored) or name of caller (if transmitted via radio)

Control:

 Volume

 Selection of name from stored phone directory, display of phone number and memory location number of party being called.

 Accepting a call

 Dial repeat

Television

Readout:

 Number of TV channel and memory slot number

Control:

 Volume