Audio/COMAND Function - GF82.85-P-0014LFM
Model 217, 222 as of model year 2018
Function requirements for Audio/COMAND, general
- Circuit 30t ON
- Transport mode not active
Audio/COMAND, general
The head unit (A26/17) is the central control unit for the entertainment and communication systems integrated into the vehicle.
The head unit acts as a gateway. The head unit routes the signals from the user interface CAN (CAN HMI) to the components of the telematics CAN (CAN A) and the Media Oriented System Transport (MOST), thereby setting up the communications interface.
The head unit communicates with the following control units over
MOST:
- TV tuner control unit (N143) (with code 865 (TV tuner))
- Rear Seat Entertainment system controller unit (A26/18) (with CODE 864 (Rear Seat Entertainment system))
- Sound system amplifier control unit (N40/3) (with code 810 (Sound system)) or Advanced sound system amplifier control unit (N40/7) (with code 811 (Advanced sound system))
All the displays and menu representations for the Audio/COMAND display (A40/8) are generated by the head unit when a smartphone is not integrated.
Some applications can also be displayed on the instrument cluster (A1), e.g. audio, telephone, navigation.
Via Ethernet, the head unit receives software uploads for all MOST subscribers from the diagnostic connector (X11/4) connected to the diagnostic unit.
The head unit contains the following subfunctions, which are described in separate documents:
- Audio mode function
- Speaker output function
- Mobile phone system function
- Video mode function
- Internet connection function
- InCar Hotspot Function
- Voice control system function
- Navigation mode function
- TV mode function (with code 865 (TV tuner))
- Dedicated Short-Range Communications (DSRC), function (with code 498 (Japan version))
The head unit supports the following subfunctions, which are described in separate documents:
- Telematics services, function (with code 360 (HERMES UMTS) or with code 362 (HERMES LTE))
- Hybrid vehicle telematics services function (with code ME05 (Hybrid drive 85 kW/90 kW VARIANT (incl. plug-in)))
- Emergency call system, function (with code 351 (Emergency call system (HERMES))
The head unit supports the following function that is described below:
- Integration of smartphones (with code 14U (Smartphone integration package))
Integration of smartphones (with code 14U (Smartphone integration package))
The head unit enables the integration of smartphones. In order to ensure that the content is prepared in a vehicle-compatible way, only smartphone applications (apps) that have been developed for the following integration standards are supported:
- Android Auto (Google)
- CarPlay (Apple)
- MirrorLink (Car Connectivity Consortium)
In order to be able to use the smartphone apps, the smartphone must be connected to USB connector 2 (A90/5x2) of the multimedia connection unit (A90/5) and the integration standard selected via the "Connect" menu. If automatic connection has been selected under "Settings", activation via the menu is not applicable.
With the Android Auto integration standard, a Bluetooth® connection between the smartphone and the head unit is required as well as the connection via USB (Universal Serial Bus) (the connection is established automatically).
If a smartphone is connected and the integration standard Android Auto or CarPlay is activated, the head unit is switched to a special operating mode ("Integration mode") in which not all head unit functions can be used. The following functions of the head unit are not available if Android Auto or CarPlay is activated:
- Media player
- Navigation (equipment dependent)
- Voice control system
- Telephony (with CarPlay)
The radio (AM and FM), vehicle settings and safety-related functions, such as the emergency call function or the breakdown assistance (with code 360 (HERMES UMTS) or with code 362 (HERMES LTE)), can still be used in any case.
With Android Auto, the following usage restrictions apply for the telephony: Calls can only be made through the connected smartphone. Telephony with code 380 (Car telephony package) is not possible. If an integration standard is activated, the head unit supports the smartphone apps in the following manner:
- Volume adaptation for all audio signals
- Forwarding of control signals for the following components:
- Audio/COMAND control panel (A40/9) (with code 448 (Touchpad))
- Touchpad (A105) (with code 446 (Touchpad only) or with code 448 (Touchpad))
- Head unit multifunction steering wheel button group (S163/2)
- Accept/terminate phone call switch (S163/2s15)
- Voice control system on switch and favorites (S163/2s17)
- Forwarding the signals from the driver hands-free system microphone (B25/20) or the front passenger hands-free system microphone (B25/21) (e.g. for voice control or telephony)
- Audio outputs (e.g. for voice control or telephony) via the speaker system or forwarding the signals to the sound system amplifier control unit (with code 810 (Sound system)) or to the Advanced sound system amplifier control unit (with code 811 (Advanced sound system))
- Muting radio reception in the head unit (mute function), e.g. for smartphone telephony
- Forwarding of position data (e.g. GPS signals, signals from the gyro sensor, wheel speed signals)
- Forwarding of video signals generated by the smartphone to 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 head unit sends the telephone signals from and to the smartphone via the Bluetooth® antenna (A2/91) with Android Auto, and with CarPlay via the USB connection to the multimedia connection unit.
Equipment variants
The following table depicts the special equipment and standard equipment (SE) in combination with the head unit and national versions.
| Function/code | With code 531 (COMAND APS) and code 494 (USA version) | With code 531 (COMAND APS) and code 498 (Japan version) | With code 531 (COMAND APS), except code 494 (USA version) and except code 498 (Japan version) |
|---|---|---|---|
| Two Universal Serial Bus (USB) connections | SE | SE | SE |
| Media Interface, integrated into the head unit | SE | SE | SE |
| Secure Digital (SD) card slot (in the multimedia connection unit (A90/5)) | SE | SE | SE |
| Video mode | SE | SE | SE |
| Voice control system | SE | SE | SE |
| Navigation | SE | SE | SE |
| Basic telephony | SE | SE | SE |
| Bluetooth® Audio | SE | SE | SE |
| Internet access | SE | SE | SE |
| Wireless local area network (WLAN) hotspot | SE | SE | SE |
| HD radio | SE | Unavailable | Unavailable |
| Integration of smartphones (through Android Auto, CarPlay or MirrorLink) | SE | SE | SE |
| Digital Owner's Manual | SE | SE | SE |
| Dedicated Short-Range Communications (DSRC) | Unavailable | SE | Unavailable |
| Vehicle Information and Communication System (VICS) | Unavailable | SE | Unavailable |
| Code 320 (Pre-installation for single CD drive) | OPTIONAL | Unavailable | OPTIONAL |
| Code 351 (Emergency call system (HERMES)) (limited regional availability) | SE | SE | SE (special equipment) (where regionally available) |
| Code 360 (HERMES UMTS) (limited regional availability) | Unavailable | Unavailable | SE (special equipment) (where regionally available) |
| Code 362 (HERMES LTE) (limited regional availability) | SE (special equipment) (where regionally available) | SE | Optional (where regionally available) |
| Code 367 (Live Traffic Information) | SE (special equipment) (where regionally available) | Unavailable | SE (special equipment) (where regionally available) |
| Code 380 (Car telephony package) | Unavailable | Unavailable | OPTIONAL |
| Code 446 (Touchpad only) | SE (2018) | SE (2018) | SE (2018) |
| Code 448 (Touchpad) | SE | SE | SE |
| Code 536 (SIRIUS satellite radio) | SE | Unavailable | Unavailable |
| Code 537 (Digital radio (DAB)) | Unavailable | Unavailable | SE |
| Code 810 (Sound system) | OPTIONAL | OPTIONAL | OPTIONAL |
| Code 811 (Advanced Sound System) | OPTIONAL | OPTIONAL | OPTIONAL |
| Code 816 (Entertainment remote control) | Optional (model 222) | Optional (model 222) | Optional (model 222) |
| Code 856 (Business telephone in rear passenger compartment) | Unavailable | Unavailable | Optional (model 222) |
| code 865 (TV tuner) | Unavailable | SE | OPTIONAL |
| code 864 (Rear Seat Entertainment system) | Optional (model 222) | Optional (model 222) | Optional (model 222) |
| Code 866 (Preinstallation for Rear Seat Entertainment system) | OPTIONAL | OPTIONAL | OPTIONAL |
| Code 897 (Wireless mobile phone charging) | OPTIONAL | OPTIONAL | OPTIONAL |
| Code 898 (Wireless charging in rear passenger compartment) | Unavailable | Unavailable | Optional (model 222) |
| Code 899 (Multifunction telephony) | OPTIONAL | OPTIONAL | OPTIONAL |
| Code 97B (Engine noise reduction via speakers) | OPTIONAL | OPTIONAL | OPTIONAL |
| Audio/COMAND operating instructions | GF82.85-P-0014-11LFM | ||
| Overview of telematics generation | GF82.85-P-0014-02XX | ||
| InCar Hotspot, function | GF82.60-P-0011LF | ||
| Internet connection function | GF82.60-P-2040LFM | ||
| Speaker output function | GF82.62-P-4212LFM | ||
| Mobile phone system, function | GF82.70-P-0007LFM | ||
| Voice control, function | GF82.70-P-3020LFM | ||
| TV-mode, function | Model 222 as of model year 2018 with code 865 (TV tuner) | GF82.85-P-2011LFM | |
| Navigation mode, function | GF82.85-P-2012LFM | ||
| Audio mode, function | GF82.85-P-2030LFM | ||
| Video mode, function | GF82.85-P-2040LFM | ||
| Telematics services function | Model 217, 222 as of model year 2018 with code 360 (HERMES UMTS) Model 217, 222 as of model year 2018 with code 362 (HERMES LTE) |
GF82.85-P-2060LFM | |
| Hybrid vehicle telematics services, function | Model 222 as of model year 2018 with code ME05 (Hybrid drive 85kW/90kW VARIANT (incl. Plug-in)) | GF82.85-P-2061LFM | |
| Dedicated Short-Range Communications (DSRC), function | Model 217, 222 as of model year 2018 with code 498 (Japanese version) Dealer option | GF82.88-P-2001LFM | |
| Rear entertainment, function | Model 222 as of model year 2018 with code 864 (Rear compartment entertainment package) | GF82.90-P-0002LFM | |
| Emergency call system, function | Model 217, 222 as of model year 2018 with code 351 (Emergency call system (HERMES)) except code 347 (Mercedes-Benz emergency call system) except code 348 (Emergency call/assistant system) except code 350 (Ecall emergency call system, Europe) | GF82.95-P-0004LFM | |
| Overview of system components, telematics | GF82.85-P-9999LFM |