Component description for COMAND controller unit - GF82.85-P-3136CAC
MODEL 207 as of 3/2/15 as of model year 2016 with CODE 531 (COMAND APS)
Illustrated on model 207.3
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
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 30 g
- 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), in vehicles with CODE 348 (Emergency call/assist system) via the global positioning system antenna splitter (A2/5) (input)
- Audio muting from the emergency call system control unit (N123/4) (with CODE 348 (Emergency call/assist system), except CODE 810 (Sound system)) (input)
- Audio muting from the telematics services communications module (N112/2) (with CODE 350 (Ecall Europe emergency call system), 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)
- Vehicle Information and Communication System (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)
- Switch-on signal (wake-up line) for mobile phone contact plate (X237/1) (with CODE 386 (Comfort telephony)) and cellular telephone system antenna amplifier/compensator (A28/3) (with CODE 386 (Comfort telephony)) (output)
- Microphone output to emergency call system control unit (with CODE 348 (Emergency call/assist system)) or to the telematics services communications module (with CODE 350 (Ecall Europe emergency call system)) (output)
Integration of smartphones
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 smartphone apps that have been developed for the following integration standards are supported:
- Android Auto (Google)
- CarPlay (Apple)
- MirrorLink 1.1 (Car Connectivity Consortium)
In order to use the smartphone apps, the smartphone has to be connected to the USB connector 1 (A90/5x1) of the multimedia connection unit and the integration standard selected through a menu.
In the integration standards MirrorLink 1.1 and Android Auto, along with the connection through USB (Universal Serial Bus) a Bluetooth® connection is also required between the smartphone and COMAND controller unit. The Bluetooth® connection is established automatically. If a smartphone is connected and an integration standard is activated, the COMAND controller unit is switched to a special operating mode ("Integration mode"), in which not all the COMAND controller unit functions can be used. The COMAND controller unit has the following restrictions in use when in Integration mode:
- Android Auto and CarPlay: The media player, telephony and the navigation of the COMAND controller unit cannot be used when in the Integration mode.
- MirrorLink 1.1: Telephoning via the COMAND controller unit is not possible when in the Integration mode (the Internet browser in the COMAND controller unit can however also be used, as can the media player and the navigation)
The "Radio" (AM and FM) and "Vehicle settings" functions and safety-relevant functions such as, e.g. the emergency call function (with CODE 494 (USA version) or with CODE 350 (Ecall Europe emergency call system)) or the breakdown assistance (with CODE 494 (USA version) or with CODE 06U (Communications module for using Mercedes connect me services)), can definitely still be used.
- In integration mode, the COMAND controller unit supports smartphone applications in the following ways: The forwarding of control signals (e.g. from Audio/COMAND control panel (A40/9), from the + and - button, setting specific functions and volume control (S111s1), from the Accept/Terminate phone call button (S111s3), from the mute function button and for dialing from the numerical keys on the control panel on the right of the COMAND controller unit)
- Forwarding signals from inside rearview mirror microphone (A67b1) (e.g. for voice control or for telephony)
- Audio outputs (e.g. for voice-operated control or telephony) over the speaker system or forwarding of signals to the sound system amplifier control unit (with CODE 810 (Sound system))
- Muting of the radio reception in the COMAND controller unit, e.g. for smartphone telephony
- Forwarding of position data (e.g. GPS signals, gyro sensor signals, wheel speed signals)
- Forwarding of video signals generated by the smartphone to the Audio/COMAND display (A40/8)
No smartphone applications are shown in the instrument cluster.
If the smartphone is being used to make a call, the COMAND controller unit receives and sends the telephone signals from and to the smartphone with Android Auto and MirrorLink 1.1 over the Bluetooth® antenna (A2/91), with CarPlay over the USB connection to the multimedia connection 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))
- GPS receiver (Global Positioning System)
- Gyro sensor and 3D acceleration sensor
- Navigation processor and traffic data recorder
- COMAND electrical fuse (A40/3f1) on rear of device
Function
- 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 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.
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