Cockpit management and data system (COMAND), function - GF82.85-P-0003PM

MODEL 203.0 /2 /7 as of 24.4.04 with CODE (527) COMAND APS with single DVD drive (with navigation)

Fig 1: Cockpit Management And Data System (COMAND) Function Diagram - Model 203.0 /2 /7 As Of 24.4.04 With Code (527)

MOST Media Oriented System Transport

With the aid of the COMAND operating, display and control unit (A40/3) the following systems can be operated centrally:

Integrated radio
Integrated CD drive
Navigation with dynamic route guidance
Dynamic navigation system Germany
CD changer 6 disc with code (819)
Telephone "portable CTEL" UPCI system with code (388)
Sound system with code (810)
Voice control system (VCS) with code (813)

An electrical connection on the front side of the glove compartment enables audio signals from a Walkman to be transmitted to the radio.

The COMAND operating, display and control unit (A40/3) is the central component in the COMAND system. It contains a video-capable LCD color display for showing information such as operating menus and map data for the navigation.

It is operated by means of fixed function keys and 2 rotary controls as well as menu-guided in the display. Several functions can also be activated with the aid of the push-buttons on the multifunction steering wheel (MFL). It should be noted that all push-button operations on the multifunction steering wheel (MFL) are processed first by the instrument cluster (A1). The instrument cluster (A1) combines the incoming button presses with the current menu setting on the multifunction display (A1p13), and sends an appropriate Controller Area Network (data bus/CAN bus) (CAN) message to the COMAND operating, display and control unit (A40/3) if necessary.

The vehicle can also be equipped optionally with an infrared remote control for issuing commands from the rear passenger compartment and with code (813) a voice control system (VCS) for the telephone and several audio functions, which serve to enhance the operating convenience level yet further.

COMAND bus system

The digital components in the COMAND operating, display and control unit (A40/3) are interlinked through a bus system. The bus system is used to transmit data (control commands and useful information) between the various system components.

The individual components operate with different data formats and have different requirements in terms of transmission speed and reliability.

For this reason, various bus systems have been installed. These include the following:

Media Oriented System Transport (MOST)
The MOST bus is used to exchange data between the sound amplifier (A2/13), CD player with changer (in glove compartment) (A2/6) the telephone system and, if present, the voice control system A35/11. Both control data as well as the audio signals are transmitted.
Controller Area Network bus Class B (interior) (CAN-B) Data interchange with the instrument cluster takes place over CAN-B (A1). Thus the instrument cluster (A1) receives the audio, telephone and navigation data from the COMAND operating, display and control unit (A40/3) for the multifunction display (A1p13) in the instrument cluster (A1) as well as the time via this bus.

With the "Audio AUX" function additional audio sources (e.g. MP3-players, Walkman) can be connected. To this end, an AUX socket is provided as a connection option in the glove compartment.

	Cockpit Management and Data System (COMAND), driver information		GF82.85-P-0003-03PM
	Switch on/off behavior, function		GF82.85-P-2006PM