(Component Description For COMAND Controller Unit - GF82.85-P-3136GR)

MODEL 166 up to model year 2016 with CODE 512 (COMAND APS with DVD changer) 

MODEL 166 up to model year 2016 with CODE 527 (COMAND APS with single DVD drive (with navigation)) 

MODEL 166 up to model year 2016 with CODE 528 (COMAND with DVD changer) 

Shown on model 166.0 with CODE 527 (COMAND APS with single DVD drive (with navigation)) 

Courtesy of MERCEDES-BENZ USA

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:

• Audio:

• DVD video
• TV (with CODE 863 (Digital/analog TV tuner) or CODE 865 (TV tuner))
• Media interface for external audio or mass storage devices (with CODE 518 (Media Interface))
• Telephony
• Internet (except CODE 528 (COMAND incl. DVD changer))
• Navigation (map navigation with data from the internal hard disk) (except CODE 528 (COMAND incl. DVD changer))
• Voice control system (VCS [SBS]) (except CODE 528 (COMAND incl. DVD changer))
• Digital operator's manual (except CODE 528 (COMAND with DVD changer))
• Emergency call (with CODE 347 (Ecall Europe emergency call system))
• Telematics services communications module (N112/2) (with CODE B54 (COM module))
• Radio frequency headphones (H8/3) (with CODE 867 (SPLITVIEW))

• Video:

• Radio
• CD/DVD audio
• Secure Digital (SD) memory card
• USB electrical connector (X115) in stowage compartment (telephone compartment) between the front seats
• AUX connection electrical connector (X39/45) (up to 13.12.2013) in stowage compartment (telephone compartment) between the front seats, for external audio equipment (except CODE 518 (Media Interface))
• Bluetooth® Audio
• Music Register (except CODE 528 (COMAND incl. DVD changer))

Reading in the controls and input signals 

The input factors are read in via the following connections:

• Direct line 
• Media Oriented System Transport (MOST) 
• CAN 
• Infrared (IR) interface Direct line

The COMAND controller unit has the following direct connections:

• Terminal 30
• Circuit 30g
• Circuit 31
• Wake-up for MOST
• AUX connection electrical connector up to 13.12.2013 (except CODE 518 (Media Interface))
• Audio muting (with CODE 348 (Emergency call/assist system) or CODE 359 (TELEAID emergency call system))
• FM 1, AM, CL [ZV] and KEYLESS-GO antenna amplifier (A2/18)
• FM 2, DAB and TV 1 antenna amplifier (A2/19)
• Reversing camera (B84/3) (with CODE 218 (Reversing camera)) or
• 360° camera control unit (N148) (with CODE 501 (360 degree camera)) or
• Media interface control unit (N125/1) (with CODE 518 (Media interface))
• CVBS [FBAS] signal with navigation retrofit (with CODE 355 (Preinstallation for navigation retrofit))
• COMAND fan motor (M4/13) (diagnosis)
• Vehicle Information and Communication System (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 04.07.2012)
• Dedicated Short-Range Communications control unit (A50/6) (with CODE 498 (Japan version), dealer option, as of 05.07.2012)
• Telematics services communications module (with CODE B54 COM module)

• Bluetooth® antenna (A2/91)
• Multifunction antenna (A28/11)
• Hands-free system microphone group (A67b1) (2 microphones)
• Audio lines from DVD player (A40/4) (with CODE 864 (Rear entertainment system))
• Y/C lines from TV tuner (analog/digital) (A90/1) (with CODE 863 (Digital/analog TV tuner)) or from digital TV tuner (A90/3) (with CODE 865 (TV tuner))
• Y-lines from Night View Assist control unit (N101) (with CODE 610 (Night View Assist))
• Composite Video Baseband Signal (CVBS) from:

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) or CODE 811 (Advanced sound system))
• Digital Audio Broadcasting (DAB) 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 (with CODE 518 (Media Interface))
• TV tuner (analog/digital) (with CODE 863 (Digital/analog TV tuner)) or digital TV tuner (with CODE 865 (TV tuner))

CAN 

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

Infrared (IR) interface 

The integrated infrared interface is used by the COMAND controller unit to receive the signals from the remote control (A8/7) (with CODE 816 (Entertainment remote control) or with CODE 867 (SPLITVIEW)).

Evaluation of input factors 

The input values are processed in the COMAND controller unit.

Activation of output media and system components 

• Audio output (speakers) (except CODE 810 (Sound system) and CODE 811 (Advanced sound system))
• Video output: Low voltage differential signaling (LVDS) line transmits picture and video signals from the COMAND controller unit to the Audio/COMAND display (A40/8)
• 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 CODE 359 (TELE AID emergency call system))
• Audio/video output to DVD player (with CODE 864 (Rear entertainment system))
• USB connection to telematics services communications module (vehicle and position data) (with CODE B54 COM module)
• Vehicle Information and Communication System (VICS) control unit (switching voltage) (with CODE 498 (Japan version), dealer option)
• Electronic Toll Collection control unit (control) (with CODE 498 (Japan version), Dealer Option, up to 04.07.2012)
• Dedicated Short-Range Communications control unit (control) (with CODE 498 (Japan version), Dealer Option, as of 05.07.2012)
• Audio output to headphones electrical connector (cabled) (X39/6) (with CODE 867 (SPLITVIEW))
• Audio signals over Kleer® radio interface to the radio frequency headphones (cordless) (with CODE 867 (SPLITVIEW))
• Activation signal (with CODE 386 (Comfort telephony)) to mobile phone contact plate (X237/1) (as of 15.07.2013) or Bluetooth module (A34/7) (up to 12.07.2013)

When digital radio (DAB) (with CODE 537 (Digital radio)) is active, the COMAND controller unit transmits FM signals that are received in parallel to the Digital Audio Broadcasting control unit via the MOST.

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

Courtesy of MERCEDES-BENZ USA

Body 

The following components are integrated in the COMAND controller unit:

• Single drive or disk changer
• Arithmetic unit
• Hard disk (except CODE 528 (COMAND incl. DVD changer))
• Amplifier (except CODE 810 (Sound system) or CODE 811 (Advanced sound system))
• Bluetooth® receiver
• Radio tuner
• High definition (HD) radio tuner (with CODE 512 (COMAND APS with DVD changer) and CODE 494 (USA version), with CODE 528 (COMAND incl. DVD changer))
• Infrared interface (with CODE 867 (SPLITVIEW))
• Kleer® radio interface (with CODE 867 (SPLITVIEW))

Function 

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

Operating elements 

The status of the buttons on the operating panel of the COMAND controller unit are read in and made available 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 for each audio source set by turning the ON button. The switch panel for functions is used to switch over to the audio source desired by the user.

In the event of a system fault or system crash, pressing the "ON" button for approx. 8 s will reboot the COMAND controller unit.

DVD drive 

With the aid of the integrated DVD drive, audio CDs/DVDs or video DVDs can be played and data (e.g. updates) from the navigation DVD can be stored on 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 (gyrosensor) 

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, audio files can be played from an SD memory card and data can be stored on the hard drive and subsequently retrieved.

On vehicles as of 15.07.2013 the card reader can also read SDXC cards. To save data from the COMAND controller unit onto the SD card, a Personal Identification Number (PIN) protection can be activated. If PIN protection is activated then the specified PIN has to be entered first before any data can be saved onto the SD card.

Variants 

The COMAND controller unit is available in the following variants:

• With CODE 527 (COMAND APS with single DVD drive (with navigation)) (Hard disk and single DVD drive, as of 15.07.2013 also with CODE 867 (SPLITVIEW))
• With CODE 512 (COMAND APS with DVD changer) (hard disk and DVD changer, as of 15.07.2013 also with CODE (867) SPLITVIEW))
• With CODE 528 (COMAND incl. DVD changer) (DVD changer)

Diagnosis 

The COMAND controller unit is the diagnosis gateway for all MOST users. Diagnostic communication takes place between the COMAND controller unit and the SAM control unit (N10) via the interior CAN. Diagnostic communication between the SAM control unit and the diagnostic connector (X11/4) connected to the ISE tester occurs via diagnostic CAN (CAN D).

	Cockpit Management and Data System (COMAND) control unit wiring diagram		PE82.85-P-2101-97NAA
			PE82.85-P-2101-97NAB
			PE82.85-P-2101-97NAC
			PE82.85-P-2101-97NAD