Data exchange between the operating unit and instrument cluster, function - GF82.85-P-3004PMB

MODELS 203.0 /2 /7 as of 24.4.04 with CODE (525) MB Audio 50 APS radio

Control of the radio and navigation unit (A2/56) with the aid of the multifunction steering wheel (MFL)

Using the left multifunction steering wheel button group (S110) and the right multifunction steering wheel button group (S111) as well as the multifunction display (A1p13) of the instrument cluster (A1), various systems can be operated via the Media Oriented System Transport (MOST) and information on the systems can be displayed. These include:

Audio systems (radio, CD drive)
Telephone

The data exchange between the instrument cluster (A1) and the radio and navigation unit (A2/56) is performed via the local interconnect network (LIN) bus, the MOST and the Controller Area Network bus class B (interior) (CAN-B).

All the button operations on the MFL are read in voltage-coded by the steering column module (N80) via the LIN-bus and placed on the CAN-B.

The instrument cluster (A1) detects the encoded messages and via the multifunction display (A1p13) causes the system currently being activated or operated (audio or telephone) to be displayed.

At the same time, the radio and navigation unit (A2/56) processes the commands for controlling the functions within the MOST system, converts them into light pulses and thus actuates the necessary system components, e.g. the CD player with changer (in glove compartment) (A2/6).

Control and display options of the multifunction display (A1p13)

The following displays of the radio and navigation unit (A2/56) are possible:

Set frequency band and possible memory preset number
Name (only with radio data system) and frequency of station
Information whether station search was accomplished with frequency or via stored station list

Operation:

Volume
Station search via the station list or the frequency, next or previous station

The following displays of the CD player with changer (in glove compartment) (A2/6) are possible:

Number of CD currently playing
Number of CD track currently being played

Operation:

Volume
Select track (next or previous track)

The following displays of the portable CTEL (A34/6) are possible:

Request to enter PIN
Name of the network provider
Vehicle outside transmit or receive range of telephone network
Telephone number (if stored) or name of caller (if also transferred via radio)

Operation:

Volume
Selection of name from stored phone directory, display of phone number and memory location number of party being called.
Start telephone call
Accepting a call
Dial repeat
Reject or terminate telephone call

Radio and navigation unit, location/task/design/function

GF82.61-P-4109PM