C 300 (204.054) V6-3.0L (272.947) (2008)
Component Identification
Location
The COMAND controller unit is installed into the center console.
Task
The COMAND controller unit fulfills the following tasks:
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Central operating unit for the entertainment and communication systems integrated into the vehicle
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Reads in the controls and input signals
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Evaluation of input factors
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Activation of output media and system components
Central operating unit for the entertainment and communication systems integrated into the vehicle
The COMAND controller unit provides the user with a structured and uniform interface for the following system components:
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Navigation (map navigation with hard disk as data memory)
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Audio (radio, CD, DVD, Personal Computer Memory Card International Association (PCMCIA) card (MP3 also), MUSIC REGISTER, AUX)
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Telephone (ComTel with phone, address book, email and FM multiplex)
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Video (video DVD and TV operation)
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Voice control system (VCS [SBS]) and text-to-speech
Reads in the controls and input signals
The input factors are read in via the following connections:
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Direct line
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Controller Area Network (data bus/CAN bus) (CAN)
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media-oriented system transport (MOST)
Direct line
The COMAND controller unit has the following direct connections:
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Circuit 30g
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Circuit 31
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AUX input 1 (access in glove compartment)
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FM, AM and CL [ZV] antenna amplifier (A2/18) (model 204.0)
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Rear window antenna amplifier 1 (A2/71) (model 204.2/9)
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Antenna amplifier for rear window FM antenna (A2/19)
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VICS control unit (A2/37)
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Electronic Toll Collection control unit (A50/3)
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Communications control unit (N123/6) (up to 31.5.10)
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Voice control system microphone (B25/7) (2 microphones)
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Backup camera control unit (N66/2)
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Bluetooth antenna (A2/91)
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Multifunction antenna (A28/11)
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TV tuner control unit (N143) (up to 31.5.09)
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Digital TV tuner (A90/3) (as of 1.6.09)
CAN
The COMAND controller unit is an interior CAN (CAN B) subscriber. It communicates with the instrument cluster (A1) and the electronic ignition lock
control unit (N73), for example. The COMAND controller unit is a telematics CAN (CAN A) subscriber. It communicates with the Audio/COMAND
display (A40/8) and the Audio/COMAND control panel (A40/9), for example.
MOST
The COMAND controller unit is a MOST subscriber and receives control and audio signals from the following control units:
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Digital TV tuner (as of 1.6.09)
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Media interface control unit (N125/1) (with code (518) Media interface)
Evaluation of input factors
The input values are processed in the COMAND controller unit.
Activation of output media and system components