Shown here is model 207.3 |
A40/3 | COMAND control unit |
P82.89-1525-06
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 of input signals as well as actuation of output media and system components
Integration of smartphones (as of 01.12.2015)
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))
Voice control system (VCS [SBS])
Navigation (map navigation with data from internal hard disk) including extended functions
Digital operator's manual (interactive)
Audio (e.g. radio, CD/DVD, Bluetooth® audio, SD card (Secure Digital), Universal Serial Bus (USB))
Video (in high resolution or frequently used video formats such as MPEG, DIVX, WMV)
TV (with CODE 865 (TV tuner))
The user interface is shown on the Audio/COMAND display (A40/8).
Using the "Vehicle functions" menu, equipment-dependent contents and functions of additional systems (e.g. climate control, seat adjustments) can be shown and controlled on the Audio/COMAND display.
Reading in of input signals as well as actuation of output media and system components
The COMAND controller unit sends and receives signals via the following connections:
CAN
Media Oriented System Transport (MOST)
Ethernet
Direct line
CAN
The COMAND controller unit is a subscriber of the telematics CAN (CAN A) and the interior CAN (CAN B):
The COMAND controller unit receives e.g. the control signals from the Audio/COMAND control panel (A40/9) via telematics CAN.
The COMAND controller unit sends control signals to the Audio/COMAND display, for example, via telematics CAN.
E.g. from the instrument cluster (A1), the COMAND controller unit receives the signals of the left multifunction steering wheel button group (S110) and the right multifunction steering wheel button group (S111) as well as from the front SAM control unit with fuse and relay module (N10/1) the rpm signals of the Electronic Stability Program control unit (N30/4) (except CODE 233 (DISTRONIC PLUS)) or of the Electronic Stability Program Premium control unit (N30/7) (with CODE 233 (DISTRONIC PLUS)) among other things via interior CAN.
Via interior CAN, the COMAND controller unit sends navigation displays to the instrument cluster for example.
Media Oriented System Transport (MOST)
The COMAND controller unit exchanges data over MOST with the following control units:
Sound system amplifier control unit (N40/3) (with CODE 810 (Sound system))
Tuner unit (A90/4) (with CODE 536 (SIRIUS satellite radio), with CODE 537 (Digital radio (DAB)) or 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
FM 1, AM and CL [ZV] antenna amplifier (A2/18) (model 207.3) (input)
FM, AM and CL [ZV] antenna amplifier (A2/55) (model 207.4) (input)
Rear window FM antenna amplifier (A2/19) (model 207.3) (input)
TV 3, FM2 and DAB band III (A2/54) (model 207.4) (input)
Hands-free system microphone (A67b1) (input)
Multifunction antenna (A28/11) for GPS signal (global navigation system), in vehicles with code 348 (Emergency call/assist system) via the global positioning system antenna splitter (A2/5) (input)
Muting of the audio sources from the emergency call system control unit (N123/4) (with code 348 (Emergency call/assist system), except code 810 (Sound system)) (input)
Muting of the audio sources from the telematics services communications module (N112/2) (with code 350 (eCall Europe emergency call system), except code 810 (Sound system)) (input)
Muting of the audio sources from the HERMES control unit (N112/9) (with code 360 (HERMES UMTS) or code 362 (HERMES LTE), except code 810 (Sound system)) (input)
LVDS line (Low Voltage Differential Signal) from the tuner unit (with CODE 865 (TV tuner))
Reversing camera control unit (N66/2) (with CODE 218 (Reversing camera)) or 360° camera control unit (N148) (with CODE 501 (360° camera)) (input)
Bluetooth antenna (A2/91) (input and output)
WLAN antenna (A2/83) (input and output)
Multimedia connection unit (A90/5) (input and output)
COMAND fan motor (M4/13) (input and output)
USB line to the telematics services communications module (with CODE B54 (Live Traffic Information)) (input and output)
Dedicated Short-Range Communications control unit (A50/6) (with CODE 498 (Japan version), dealer option) (input and output)
VICS control unit (A2/37) (with code 498 (Japan version), Dealer Option) (input and output)
LVDS line for video data to the Audio/COMAND display (output)
Wake-up line for MOST (output)
Audio output (speaker) (except CODE 810 (Sound system)) (output)
USB line for the wake-up signal to the multimedia connection unit (output)
Wake-up line for the mobile phone contact plate (X237/1) and the cellular telephone system antenna amplifier/compensator (A28/3) (with code 386 (Comfort telephony)) (output)
Wake-up line to telephone and stationary heater antenna changeover switch (A2/155) (with code 386 (Comfort telephony) and code B24 (Remote control for stationary heater), as of 01.06.2016)
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)) or to HERMES control unit with code 351 (Emergency call system (HERMES))) (output)
Integration of smartphones (as of 01.12.2015)
The COMAND controller unit allows for the integration of smartphones. In order to ensure that the content is prepared in a vehicle-related way, only apps that have been developed for the following integration standards are supported:
CarPlay (Apple)
MirrorLink (Car Connectivity Consortium)
In order to be able to use the smartphone applications, the smartphone must be connected via the universal serial bus (USB) to USB connector 2 (A90/5x2) of the multimedia connection unit and the integration standard selected via the telephone menu (unless automatic connection has been selected under "Options").
If the CarPlay integration standard has been activated, the COMAND controller unit is brought into a special operating mode ("Integration mode"), in which individual functions of the COMAND controller unit cannot be used. The "radio", "vehicle settings" and safety relevant functions, such as emergency call function (with code 348 (Emergency call/assist system) or with code 350 (eCall Europe emergency call system)) or with code 351 (Emergency call system (HERMES)), can still be used.
The COMAND controller unit supports smartphone apps as follows:
Volume control for all audio signals
Forwarding of control signals (e.g. from buttons on the COMAND controller unit, from the Audio/COMAND control panel, long press of the voice control system on button (S111s4), pressing the accept/terminate phone call button (S111s3) from the right multifunction steering wheel button group)
Forwarding of signals from the hands-free system microphone group (A67b1) (e.g. for voice control or telephony)
Audio output (e.g. for voice control or telephony) via the speaker system or forwarding of the signals to the sound system amplifier control unit (with code 810 (Sound system))
Muting of the audio sources (mute function) in the COMAND controller unit, e.g. with smartphone telephony
Forwarding of position data (e.g. GPS signals, gyro sensor signals, wheel speed signals)
Forwarding of video signals generated by the smartphone for displaying on the Audio/COMAND display
Forwarding of status information for displaying in the instrument cluster
The smartphone applications themselves are not shown in the instrument cluster.
If the smartphone is being used to make a call, the COMAND controller unit receives and transmits the telephone signals from and to the smartphone with MirrorLink via the Bluetooth® antenna, and with CarPlay via the USB connection to the multimedia connection unit.
Body
The following components are integrated in the COMAND controller unit:
Arithmetic unit
Operating elements
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
SD card slot (Secure Digital)
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))
GPS receiver
Gyro sensor and 3D acceleration sensor
Navigation processor and traffic data recorder
COMAND electrical fuse (A40/3f1) on rear of device
Functions
DVD drive
Navigation and GPS control unit
Gyro 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 and 3D acceleration sensor
The gyro sensor 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.