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

MODEL 218 as of model year 2015 with CODE 531 (COMAND APS) 

Shown on model 218.3 with CODE 531 (COMAND APS) 

Location 

The COMAND controller unit is located in the center console.

Tasks 

The COMAND controller unit fulfills the following tasks:

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

Central control unit for the entertainment and communication systems integrated into the vehicle 

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

• Telephony
• Internet (including WLAN hotspot (Wireless Local Area Network))
• Audio (e.g. radio, CD/DVD, Bluetooth® audio, SD card (Secure Digital), Universal Serial Bus (USB) over multimedia connection unit (A90/5))
• Video (in high resolution or frequently used video formats such as MPEG, DIVX, WMV)
• TV (with CODE 865 (TV tuner))
• Navigation (map navigation with data from internal hard disk)
• Voice control system (VCS [SBS])
• Digital operator's manual (interactive)

Reading in the controls and input signals 

The input factors are read in via the following connections:

• CAN 
• Media Oriented System Transport (MOST) 
• Ethernet 
• Direct line 

CAN 

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

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))
• Tuner unit (A90/4) (with CODE 536 (SIRIUS satellite radio), with CODE 537 (Digital radio (DAB)), with CODE 865 (TV tuner))

Ethernet 

The COMAND controller unit is connected to the diagnostic connector (X11/4) via the Ethernet.

Direct line 

The COMAND controller unit has the following direct connections:

• Circuit 30g
• Circuit 31
• Wake-up line for MOST
• Multimedia connection unit
• FM 1, AM, CL and KEYLESS-GO antenna amplifier (A2/18) (model 218.3)
• Rear window antenna amplifier 1 (A2/71) (model 218.9)
• FM 2 and DAB antenna amplifier (A2/19) (model 218.3)
• FM 2, DAB and TV antenna amplifier (A2/19) (model 218.9)
• WLAN antenna (A2/83)
• Bluetooth antenna (A2/91)
• Multifunction antenna (A28/11)
• Hands-free system microphone (A67b1) (2 microphones)
• COMAND fan motor (M4/13) (diagnosis)
• Audio muting from emergency call system control unit (N123/4) (with CODE 348 (Emergency call/assist system), except CODE 810 (Sound system) and except CODE 811 (Advanced sound system)) or from telematics services communications module (N112/2) (with CODE 350 (Ecall Europe emergency call system), except CODE 810 (Sound system) and except CODE 811 (Advanced sound system))
• LVDS line (Low Voltage Differential Signal) from the tuner unit (with CODE 865 (TV tuner))
• Reversing camera (B84/3) (with CODE 218 (Reversing camera)) or 360° camera control unit (N148) (with CODE 501 (360° camera))
• USB connection (Universal Serial Bus) with telematics services communications module (real-time traffic data) (with CODE B54 (Live Traffic Information))
• VICS control unit (A2/37) (with CODE 498 (Japan version), Dealer Option)
• Dedicated Short-Range Communications control unit (A50/6) (with CODE 498 (Japan version), dealer option)

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 sends picture signals 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 348 (Emergency call/assist system)) or to telematics services communications module (with CODE 350 (Ecall Europe emergency call system))
• USB connection to telematics services communications module (position data) (with CODE B54 (Live Traffic Information))
• VICS control unit (switching voltage) (with CODE 498 (Japan version), Dealer Option)
• Dedicated Short-Range Communications control unit (with CODE 498 (Japan version), Dealer Option)
• Switch-on signal to mobile phone contact plate (X237/1) (with CODE 386 (Comfort telephony))
• Wake-up line for MOST

With active digital radio (DAB) (with CODE 537 (Digital radio (DAB)) the COMAND controller unit sends FM signals received in parallel over the MOST to the tuner unit.

Body 

The following components are integrated in the COMAND controller unit:

• Arithmetic unit
• DVD changer (with CODE 814 (DVD changer)) or single DVD drive (with CODE 815 (Single DVD drive))
• Hard disk with searchable database for audio files (music server), including cover art, cover flow and Gracenote Database
• Bluetooth® receiver
• WLAN receiver
• Radio tuner for AM reception, FM phase diversity and separate FM tuner function for data services, e.g. traffic messages
• HD radio tuner (High Definition) (with CODE 494 (USA version))
• 4-channel amplifier (except CODE 810 (Sound system) or CODE 811 (Advanced sound system))
• GPS receiver (Global Positioning System)
• Gyro sensor (turn rate sensor) and 3D acceleration sensor
• Navigation processor and traffic data recorder
• Electrical fuse for COMAND controller unit (A40/3f1) in the combination connector at the rear panel

Function 

• DVD drive 
• Navigation and GPS control unit 
• Gyro sensor (turn rate sensor) and 3D acceleration sensor 
• Control unit for voice control system (VCS [SBS]) 

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 a navigation DVD can be stored on the internal hard disk.

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.

Gyro sensor (turn rate sensor) and 3D acceleration sensor 

The gyrosensor and the 3D acceleration sensor are used to determine vehicle direction changes. They are installed in the navigation processor. Calibration is not required.

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

The COMAND controller unit processes the voice commands, evaluates them and creates the voice output for the dialog with the user.

Cockpit Management and Data System (COMAND) control unit wiring diagram

PE82.85-P-2101-97XAF