GF82.61-P-0003TX Audio 50 APS, Function
GF82.61-P-0003TX Audio 50 APS, Function
- with CODE (525) MB Audio 50 APS radio
The radio control panel and navigation unit (A2/56) is the central operating unit for the entertainment and communication systems integrated in the vehicle within the Media Oriented System Transport (MOST). The radio control panel and navigation unit (A2/56) has an integrated screen to display information such as function key assignment, functions status, and operating menus.
The following functions can be operated:
^ Radio tuner
^ Audio amplifier
^ CD drive
^ Telephone
^ Navigation
^ Sound system with code (810) Sound system
^ CD changer (A2/6) with code (819) CD changer (6-disc)
^ Voice control system (VCS) with code (813) Voice control system (VCS [SBS])
The radio control panel and navigation unit (A2/56) can be operated using 2 main control panels, which are located to the left and right next to the display, a rotary/pushbutton switch, a cross- shaped rocker button, and 5 buttons below the display. Some functions can be activated using the left multifunction steering wheel button group (S110) and right multifunction steering wheel button group (S111) of the multifunction steering wheel. It should be noted that all button operations on the MFL are processed first by the instrument cluster (A1). The instrument cluster (A1) links the incoming button actuations with the current menu setting on the multifunction display (A1p13) and transmits a corresponding message via the Controller Area Network bus class B (interior) (CAN-B) to the radio control panel and navigation unit (A2/56) if necessary. The digital components of the radio control panel and navigation unit (A2/56) are linked to each other by the MOST. This bus system is used to transmit data (control commands and useful information) between the various system components.
Because the individual components work with different data formats and require different data transfer rates, different bus systems have been installed:
^ Media Oriented System Transport (MOST)
^ Controller Area Network bus Class B (interior) (CAN-B)
^ Local interconnect network (LIN)
The following conditions must be met for startup:
^ Circuit 15R ON
^ Battery voltage is 12 V
^ System check carried out without faults
System activation
The radio control panel and navigation unit (A2/56) switches on when the user operates the rotary/pushbutton switch. The volume for the set audio source is regulated at the rotary switch. The function keys switch over to the audio source desired by the user.
Settings made during navigation voice output apply as the default setting for the subsequent navigation voice output. The radio control panel and navigation unit (A2/56) is operated using the following keys:
^ Fixed programmed function keys
^ Alphanumeric key block
^ Eject key
^ Programmable function keys
^ Rotary switch with integrated hands-free button
^ Cross-shaped rocker button with confirm button
^ On button
^ Mute button
^ Display
^ Control buttons on the MFL
Remote control is not available.
Interfaces
Data are exchanged between the radio control panel and navigation unit (A2/56) and the instrument cluster (A1) via the CAN-B. The instrument cluster (A1) receives the audio and telephone data for the multifunction display (A1p13) in the instrument cluster (A1) as well as the time via the CAN-B from the radio control panel and navigation unit (A2/56) via the audio gateway control unit (N93/1).
The radio control panel and navigation unit (A2/56) controls the following components:
^ CD changer (A2/6) with code (819) CD changer (6-disc) (data are exchanged via MOST).
^ Universal Portable CTEL Interface (UPCI [UHI]) control unit (N123/1) with code (388) "Portable CTEL" for UPCI system
(data are exchanged via MOST).
^ Audio gateway control unit (N93/1)
(data are exchanged via MOST).
^ Instrument cluster (A1)
(data are exchanged via MOST and CAN-B).
Operation of the radio control panel and navigation unit (A2/56) using the multifunction steering wheel (MFL) With the aid of 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) it is possible to operate different systems via MOST and display system information. These include:
^ Audio systems (radio, CD drive)
^ Telephone
The entire data exchange between the MFL and the radio control panel and navigation unit (A2/56) takes place via LIN bus, MOST, and CAN-B. All button operations on the MFL are read in voltage coded via the LIN bus by the steering column module (N80) and placed on the CAN-B. The instrument cluster (A1) recognizes the coded messages and prompts the multifunction display (A1p13) to show the currently activated or operated system (audio or telephone).
The radio control panel and navigation unit (A2/56) controls the commands within the MOST system, converts them into light pulses, and actuates the necessary system components, e.g., the CD changer (A2/6) on vehicles with code (819) CD changer (6- disc).
Control and display options in the multifunction display (A1p13)
The radio control panel and navigation unit (A2/56) can display the following information:
^ Set frequency range and memory location number (where applicable)
^ Name (only for radio data system) and frequency of radio station
^ Information as to whether station search takes place via frequency or via the stored station list
Control:
^ Volume
^ Station search via station list or frequency, next station or previous station
The CD changer (A2/6), with code (819) CD changer (6-disc) can display the following:
^ Number of CD currently playing
^ Number of CD track currently being played
Control:
^ Volume
^ Select track (next or previous track)
The portable CTEL (A34/6) can display the following:
^ Request to enter the Personal Identification Number (PIN)
^ Name of service provider
^ Vehicle outside transmit or receive range of telephone network
^ Call number (if stored) or name of caller (if transmitted at the same time with two-way radio)
Control:
^ Volume
^ Selection of name from stored phone directory, display of phone number and memory location number of party being called.
^ Start call
^ Accepting a call
^ Dial repeat
^ Reject or end a call
Reading out faults with the aid of STAR DIAGNOSIS
When making an inquiry with the aid of STAR DIAGNOSIS, the data are transmitted by the radio control panel and navigation unit A2/56) to the audio gateway control unit (N93/1) via MOST and can then be read out. The central gateway control unit (N93) carries out the diagnosis and transmits it over the CAN-B to the audio gateway control unit (N93/1).
