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

MODELS 203.0 /2 /7 as of 24.4.04 with CODE (528) HIGH Class USA

MODELS 203.0 /2 /7 as of 24.4.04 with CODE (530) COMAND APS USA (with navigation system)

Fig 1: Cockpit Management And Data System (COMAND) Function Diagram - Models 203.0 /2 /7 As Of 24.4.04 With Code (528) And (530)

Data flow for the overall system, shown with the following equipment:

Code (388) portable CTEL telephone, UPCI system

Cockpit management and data system (COMAND), function

The COMAND operating, display and control unit (A40/3) is the central component in the COMAND system. It has a video-capable Liquid Crystal Display (LCD) color display to output information such as operating menus and map data for navigation. It is operated by means of fixed function keys and two rotary controls and menu-guided in the display. Several functions can also be activated with the aid of the buttons on the multifunction steering wheel (MFL). It should be noted that all button operations on the multifunction steering wheel (MFL) are first processed by the instrument cluster (A1). The instrument cluster (A1) combines the incoming button signals with the current menu setting on the multifunction display (A1p13) and sends an appropriate Controller Area Network (databus/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 of the passenger compartment as well as a voice control system (VCS) (code 813) for telephone functions and several audio functions, both of which serve to further enhance operating convenience.

Bus system (COMAND)

The digital components in the COMAND operating, display and control unit (A40/3) are networked with each other through a bus system. The bus system 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, the following different bus systems have been installed:

Controller area network bus class B (interior) (CAN-B)
media-oriented system transport (MOST)

The MOST system is used for data exchange between the sound amplifier (A2/13) (with code 810), the CD player with changer (in glove compartment) (A2/6) (with code 819), the telephone system and, if installed, the voice control system (VCS) (with code 813). Both control data as well as the actual audio signals are transmitted.

The CAN-B is used for data exchange with the instrument cluster (A1). In this way, the instrument cluster (A1) receives, from the COMAND operating, display and control unit (A40/3), the audio, telephone and navigation data for the multifunction display (A1p13) in the instrument cluster (A1) as well as the time of day.

The "Audio AUX" function allows additional audio sources (e.g. MP3 player, Walkman) to be connected. The external "AUX" socket for connecting other audio sources is located in the glove compartment.

	Cockpit Management and Data System (COMAND), driver information	Displays in the instrument cluster	GF82.85-P-0003-03PMU
	Switch on/off behavior, function		GF82.85-P-2006PMU