Component Description For COMAND Controller Unit - GF82.85-P-3136GW

Model 463 

as of model year 2013 up to model year 2017 

Shown on model 463.236 (except code ZJ1 (Version for Japan)) 

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
• Radio
• CD/DVD audio
• Secure Digital (SD) memory card
• USB electrical connector (X115) in stowage compartment (telephone compartment) under the armrest
• AUX connection electrical connector (X39/45) in stowage compartment (telephone compartment) beneath the armrest, for external audio equipment (except code EH3 (Media Interface))
• Bluetooth® Audio
• Music Register
• Video
• DVD video
• TV (with code EM8 (TV tuner))
• Media Interface for external audio or mass storage devices (with code EH3 (Media Interface))
• Telephony
• Internet
• Navigation (map navigation with data from internal hard disk)
• Voice control system (VCS [SBS])

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 

Direct line 

The COMAND controller unit has the following direct connections:

• Circuit 30
• Circuit 30g
• Circuit 31
• Wake-up for MOST
• AUX connection electrical connector (access beneath armrest) (except code EH3 (Media Interface))
• Audio muting (mute function) of emergency call system control unit (N123/4) (with code ZU8 (USA national version))
• TV 1 antenna amplifier (A94/1) (except model 463.202)
• AM and FM antenna amplifier (A2/33) (except model 463.202)
• AM, FM and FM 2 antenna amplifier (A2/55) (model 463.202)
• Bluetooth® antenna (A2/91)
• Left front GPS antenna (A2/23), in vehicles with code ZU8 (USA national version) via the global positioning system antenna splitter (A2/5)
• Hands-free system microphone (A67b1) (2 microphones)
• Y/C lines (Y-brightness (luminance)/C-color information (chrominance)) from digital TV tuner (A90/3) (with code EM8 (TV tuner))
• Color video baseband signal (CVBS) from:
  • Reversing camera (B84/3) (with code FR8 (Reversing camera))
  • Media interface control unit (N125/1) (with code EH3 (Media Interface))
• COMAND fan motor (M4/13) (diagnosis)
• Vehicle Information and Communication System (VICS) control unit (A2/37) (with code ZJ1 (Version for Japan), Dealer Option)
• DSRC control unit (A50/3) (with code ZJ1 (Version for Japan), Dealer Option)

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 EU9 (Harman Kardon® Logic 7® surround sound system))
• Digital Audio Broadcasting control unit (N87/3) (with code EF6 (Digital radio (DAB)))
• Satellite Digital Audio Radio (SDAR) control unit (N87/5) (with code ZU8 (USA national version))
• Media interface control unit (with code EH3 (Media Interface))
• Digital TV tuner (with code EM8 (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

Evaluation of input factors 

The input values are processed in the COMAND controller unit.

Activation of output media and system components 

• Audio output (speaker) (except code EU9 (Harman Kardon® Logic 7® surround 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 (with code ZU8 (USA national version))
• VICS control unit (switching voltage) (with code ZJ1 (Version for Japan), Dealer Option)
• DSCR control unit (controller) (with code ZJ1 (Version for Japan), Dealer Option)
• Activation signal (with code EH2 (Comfort telephony)) to the mobile phone contact plate (X237/1) (as of 02.09.2013) or to the Bluetooth® module (A34/7) (up to 30.08.2013)

When digital radio is active (DAB), the COMAND controller unit transmits FM signals received at the same time to the Digital Audio Broadcasting control unit via MOST.

Shown on COMAND controller unit with DVD changer 

Courtesy of MERCEDES-BENZ USA

Structure 

The following components are integrated in the COMAND controller unit:

• Operating elements
• DVD changer or single drive (with code ZJ1 (Version for Japan))
• Arithmetic unit
• Hard disk
• Amplifier (except code EU9 (Harman Kardon® Logic 7® surround sound system))
• Bluetooth® receiver for basic telephony
• Radio tuner
• High Definition (HD) radio tuner (with code ZU8 (USA national version))
• SD card slot
• COMAND electrical fuse (A40/3f1) (at the rear panel)
• Gyro sensor

Function 

• Operating elements 
• DVD drive 
• Navigation processor 
• Gyro sensor 
• Control unit for voice control system (VCS [SBS]) 
• Card reader for SD card 
• Diagnosis 

Operating elements 

The controls of the COMAND controller unit are read in and the signals relayed to the arithmetic unit. The signals 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 buttons of the left control panel switch on the media requested by the user.

In the event of system fault or system crash, pressing the "ON" button for t = 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 disk.

Navigation processor 

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.

Gyro sensor 

The gyro 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 card 

With the aid of the integrated card reader, audio files can be played from an SD card and data can be stored on the hard drive and retrieved later.

The card reader can also read SDXC cards. To save data from the COMAND controller unit onto the SD card, a PIN (Personal Identification Number) 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.

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 diagnostic equipment takes place via the diagnostic CAN (CAN D).

Variants 

The COMAND controller unit is available in the following variants:

• With DVD changer (except code ZJ1 (Version for Japan))
• With single drive (with code ZJ1 (Version for Japan))

	Cockpit Management and Data System (COMAND) control unit wiring diagram	Model 463 as of model year 2013 up to model year 2017 except code ZJ1 (Version for Japan) except code ZU8 (National version for USA)/YoM 12 model refinement package, control unit A40/3, sheet 1	PE82.85-P-2101-97ZGA
		Model 463 as of model year 2013 up to model year 2017 except code ZJ1 (Version for Japan) except code ZU8 (National version for USA)/AEJ 12 model refinement package, control unit A40/3, sheet 2	PE82.85-P-2101-97ZGB
		Model 463 as of model year 2013 up to model year 2017 with code ZU8 (National version for USA) except code ZJ1 (Version for Japan)/YoM 12 model refinement package, control unit A40/3	PE82.85-P-2101-97ZGC
		Model 463 as of model year 2013 up to model year 2017 with code ZJ1 (Version for Japan) except code ZU8 (National version for USA)/YoM 12 model refinement package, control unit A40/3	PE82.85-P-2101-97ZGE