Component description for COMAND controller unit - GF82.85-P-3136CEA

MODEL 204.0/2 as of model year 2012 with CODE 512 (COMAND APS with DVD changer) without CODE 527 (COMAND APS with single DVD drive (with navigation)) 

MODEL 204.0/2 as of model year 2012 with CODE 527 (COMAND APS with single DVD drive (with navigation)) without CODE 512 (COMAND APS with DVD changer) 

MODEL 204.3 with CODE 512 (COMAND APS with DVD changer) 

MODEL 204.3 with CODE 527 (COMAND APS with single DVD drive (with navigation)) 

MODEL 204.9 as of model year 2013 with CODE 512 (COMAND APS with DVD changer) without CODE 527 (COMAND APS with single DVD drive (with navigation)) 

MODEL 204.9 as of model year 2013 with CODE 527 (COMAND APS with single DVD drive (with navigation)) without CODE 512 (COMAND APS with DVD changer) 

Shown with CODE 512 (COMAND APS with DVD changer) 

Location 

The COMAND controller unit is located in the center console.

Tasks 

The COMAND controller unit fulfills the following tasks:

• Central operating unit for entertainment and communication systems integrated into vehicle 
• Reading in the controls and input signals 
• Evaluation of input factors 
• Activation of output media and system components 

Central operating unit for entertainment and communication systems integrated into vehicle 

The COMAND controller unit provides the user with a structured and uniform user interface for the following system components:

• Telephone
• Navigation (map navigation with data from internal hard disk)
• Internet (COMAND online) (as of 01.06.2012 all vehicles, up to 31.05.2012 except CODE 494 (USA version))
• Voice control system (VCS [SBS])
• Radio
• CD/DVD audio
• Secure Digital (SD) memory card
• Music Register
• Bluetooth® Audio
• AUX connection electrical connector (X39/45) (except CODE 518 (Media Interface), up to 31.05.2013) and USB electrical connector (X115), in stowage compartment (telephone compartment) beneath the armrest, for external audio equipment
• DVD video
• TV (with CODE 865 (TV tuner))
• Media interface for external audio or mass storage devices (with CODE 518 (Media Interface))
• Digital operator's manual (as of 01.06.2012)
• Emergency call (with CODE 347 (Ecall Europe emergency call system))

Reading in the controls and input signals 

The input factors are read in via the following connections:

• Direct line 
• CAN 
• Media Oriented System Transport (MOST) 
• Infrared interface (Model 204.9 with CODE 867 (SPLITVIEW)) 

Direct line 

The COMAND controller unit has the following direct connections (inputs):

• Circuit 30g and circuit 31
• Wake-up for MOST
• AUX connection electrical connector (except CODE 518 (Media Interface), up to 31.05.2013) and USB electrical connector (access in center console telephone compartment)
• FM, AM and CL antenna amplifier (A2/18) (model 204.0/3)
• Rear window antenna amplifier 1 (A2/71) (model 204.2/9)
• Rear window FM antenna antenna amplifier (A2/19) (model 204.0/2, model 204.9 except CODE 537 (Digital radio) and except CODE 865 (TV tuner))
• FM 2 and DAB antenna amplifier (A2/19) (model 204.3)
• FM 2, DAB and TV 1 antenna amplifier (A94/1) (model 204.9 with CODE 537 (Digital radio) or CODE 865 (TV tuner))
• Bluetooth antenna (A2/91)
• Multifunction antenna (A28/11)
• Hands-free system microphone (A67b1) (2 microphones)
• Audio muting, from emergency call system control unit (N123/4) (with CODE 348 (Emergency call/assist system) or with CODE 359 (TELEAID emergency call system))
• Y brightness (luminance)/C color information (chrominance) (Y/C) lines from digital TV tuner (A90/3) (with CODE 865 (TV tuner))
• Composite Video Baseband Signal (CVBS [FBAS]) from the reversing camera power supply module (N66/2) (with CODE 218 (Reversing camera))
• CVBS signal from the Media Interface electrical connector (X18/70) (with CODE 518 (Media Interface))
• Traffic data from telematics services communications module (N112/2) (with CODE B54 (COM module))
• VICS control unit (A2/37) (with CODE 498 (Japan version), Dealer Option)
• Electronic Toll Collection control unit (A50/3) (with CODE 498 (Japan version), Dealer Option, up to 31.05.2012)
• Dedicated Short-Range Communications control unit (A50/6) (with CODE 498 (Japan version), dealer option, as of 01.06.2012)
• COMAND fan motor (M4/13) (diagnosis)

CAN 

• The COMAND controller unit is a telematics CAN (CAN A) and interior CAN (CAN B) subscriber

In model 204.0/2/3 with CODE 255 (AMG Performance Media) the COMAND controller unit receives the signals of the Audio/COMAND control panel on the telematics CAN via the AMG Performance Media control unit (N125/3).

Media Oriented System Transport (MOST) 

The COMAND controller unit receives control and audio signals from the following control units:

• Sound system amplifier control unit (N40/3) (with CODE 810 (Sound system))
• Digital Audio Broadcasting control unit (N87/3) (with CODE 537 (Digital radio))
• Satellite Digital Audio Radio (SDAR) control unit (N87/5) (with CODE 536 (SIRIUS satellite radio))
• Media interface control unit (N125/1) (with CODE 518 (Media interface))
• Digital TV tuner (with CODE 865 (TV tuner))

Infrared interface (Model 204.9 with CODE 867 (SPLITVIEW)) 

• Control signals (infrared) from the remote control (A8/7)

Evaluation of input factors 

The input values are processed in the COMAND controller unit.

Activation of output media and system components 

• Audio output (speaker) (without CODE 810 (Sound system))
• Video output: low voltage differential signal (LVDS) line for picture and video signals from the COMAND controller unit to the Audio/COMAND display (A40/8), in model 204.0/2/3 with CODE 255 (AMG Performance Media) via the AMG Performance Media control unit
• COMAND fan motor (power supply and speed control)
• Microphone output to emergency call system control unit (N123/4) (with CODE 348 (Emergency call/assist system) or with CODE 359 (TELEAID emergency call system))
• Activation signal (with CODE 386 (Mobile phone)) to the mobile phone contact plate (X237/1) (as of 01.06.2013) or the Bluetooth module (A34/7) (up to 31.05.2013)
• Position data to the telematics services communications module (with CODE B54 (COM module))
• Electronic Toll Collection control unit (with CODE 498 (Japan version), Dealer Option, up to 31.05.2012) (control)
• Dedicated Short-Range Communications control unit (with CODE 498 (Japan version), Dealer Option, as of 01.06.2012) (control)
• VICS control unit (switching voltage) (with CODE 498 (Japan version), Dealer Option)
• Audio signals to the (cabled) headphones electrical connector (X39/6) or audio signals via the integrated radio interface to the radio frequency headphones (H8/3) (model 204.9 with CODE 867 (SPLITVIEW))

With active Digital Audio Broadcasting (Digital Radio) (DAB) (with CODE 537 (Digital radio)) the COMAND control unit transmits FM signals received in parallel via the MOST to the Digital Audio Broadcasting control unit.

Body 

Shown on COMAND controller unit with CODE 512 (COMAND APS with DVD changer) 

The following components are also integrated into the COMAND controller unit:

• Single drive or disk change
• Arithmetic unit
• HDD hard disk
• Amplifier (without CODE 810 (Sound system))
• Radio tuner
• High definition (HD) radio tuner (with CODE 512 (COMAND APS with DVD changer) and CODE 494 (USA version) or with CODE 527 (COMAND APS with single DVD drive (with navigation) and CODE 494 (USA version)))
• Bluetooth® receiver
• Infrared interface for remote control (model 204.9 with CODE 867 (SPLITVIEW))
• Radio interface for radio frequency headphones (model 204.9 with CODE 867 (SPLITVIEW))

Function 

• Operating elements 
• DVD drive 
• Navigation and GPS control unit 
• Turn rate sensor (gyro sensor) 
• Control unit for voice control system (VCS [SBS]) 
• Card reader for SD memory card 

Operating elements 

The buttons on the operating panel of the COMAND controller unit are read in and relayed to the arithmetic unit. The button operations undergo further processing in the arithmetic unit and are forwarded via the MOST, the telematics CAN or the interior CAN to the other system components in the form of messages. If the ON button on the COMAND controller unit is pressed, the COMAND controller unit is switched on. The volume is regulated by turning the "ON" button. You can switch to the function range required by the user using the left button group.

In the event of a system fault or system crash, the COMAND controller unit can be rebooted by pressing the "ON" button for t = 8 s.

DVD drive 

The integrated DVD drive can be used to play back audio CDs/DVDs or video DVDs and store data (e.g. updates) from the navigation DVD onto the internal hard drive.

Navigation and GPS control unit 

The navigation processor is integrated into the COMAND controller unit and calculates the location of the vehicle using the incoming antenna signals. It also calculates the vehicle's route after the destination has been entered.

Turn rate sensor (gyro sensor) 

The turn rate sensor determines vehicle direction changes. It is installed into the navigation processor. Calibration is not required.

Control unit for voice control system (VCS [SBS]) 

The voice commands are processed and evaluated in the COMAND controller unit. The voice outputs for the dialog with the user are generated in the COMAND controller unit.

Card reader for SD memory card 

With the aid of the integrated card reader, data and audio files can be copied from an SD memory card to the internal hard disk and then retrieved.

Variants 

The COMAND controller unit is available in the following variants:

• With CODE 527 (COMAND APS with single DVD drive (with navigation))
• With CODE 512 (COMAND APS with DVD changer)

Diagnosis 

The COMAND controller unit is the diagnosis gateway for all MOST users. The diagnostic communication takes place between the COMAND controller unit and the front SAM control unit with fuse and relay module (N10/1) via the interior CAN. The diagnostic communication between the front SAM control unit with fuse and relay module and the diagnostic connector (X11/4) connected to the ISE tester is performed over the diagnostic CAN (CAN D).

Cockpit Management and Data System (COMAND) control unit wiring diagram	A40/3, except code (498) Japan version, specification 1	PE82.85-P-2101-97FAD
	A40/3, with code (498) Japan version, specification 1	PE82.85-P-2101-97FAE
	A40/3, with code (498) Japan version, specification 2	PE82.85-P-2101-97FAF
	A40/3, except code (498) Japan version, specification 2	PE82.85-P-2101-97FAG