GF82.60-P-0005SK Audio 20 Function

GF82.60-P-0005SK Audio 20 Function
- with CODE (523) MB Audio 20 radio

Component Identification:

The radio (A2) is the central control panel for the entertainment and communications systems integrated in the vehicle within the Media Oriented System Transport (MOST).
It is equipped with a vacuum fluorescent display (monochrome) that can be used to output information such as function button assignment, function status, and operation menus.

The following functions at most can be operated:
^ Radio
^ Audio amplifier
^ CD disk drive
^ Telephone
^ Audio AUX

Additional audio sources, e.g. an MP3 player, can be integrated into the front entertainment system using the audio AUX function. An AUX jack is located in the glove compartment as a connection facility.

The radio (A2) can be operated by 2 main control fields, which are located on the left and right next to the display, as well as a combination push and rotary knob and a cross-shaped rocker button. Some functions can be activated using the left multifunction steering wheel button group (S110) and the right multifunction steering wheel button group (S111) of the multifunction steering wheel (MFL). Here one should note that all buttons actuations on the multifunction steering wheel are initially processed by the instrument cluster (A1). The instrument cluster (A1) links the incoming button actuations with the current menu setting on the upper multifunction display (A1p13) and transmits a corresponding Controller Area Network bus class B (interior) (CAN-B) message to the radio (A2) via the audio gateway control unit (N93/1) if necessary.

Media Oriented System Transport (MOST) data bus system
The digital components of the radio (A2) are networked to each other via the MOST. The MOST is used to transmit data (control commands and useful information) between the various system components.
Because some of the individual components work with different data formats or require different data transfer rates and security levels, different data bus systems have been installed:
^ MOST
^ Controller Area Network bus, class B (interior compartment) (CAN B)
^ Controller Area Network bus, class C (engine compartment) (CAN C)
^ Local interconnect network (LIN) bus

The conditions must be met for startup:
^ Circuit 15R ON
^ Voltage supply (on-board power supply 12 V) applied
^ System check (authentication) positive

System activation
The operating unit switches on when the combination push and rotary knob is pressed. In each case the volume can be regulated with the pushbutton rotary switch for the audio source active. The function keys switch over to the audio source desired by the user. The radio (A2) is operated via:
^ Permanently programmed function keys
^ Alphanumeric key block
^ Eject button
^ Programmable function keys
^ Combination push and rotary knob with integrated hands-free button
^ Cross-shaped rocker switch with pushbutton
^ ON button
^ Mute button
^ Display
^ Control buttons on the MFL

A remote control is not planned.

Interfaces
The data exchange between the radio (A2) and the instrument cluster (A1) takes place via CAN-B. In this way, the instrument cluster (A1) receives the audio and telephone data from the radio (A2) for the upper multifunction display (A1p13) in the instrument cluster (A1) as well as the time via CAN-B.
The time can also be synchronized between the radio (A2) and the instrument cluster (A1) via the multifunction steering wheel.