Navigation, function

P82.61-A003-79

P82.61-4191-79

Function requirements, general

 Circuit 30t ON

 Transport mode not active

 Head unit ON

 Authorized Secure Digital (SD) card in the SD card slot on the multimedia connection unit

 Signals from at least 4 global navigation system (GPS) satellites available

 No smartphone connected via Android Auto or CarPlay

 The SD card must be authorized for the head unit.

Map navigation, general

The head unit processes the following input information:

 Map data (as of 01.06.2018 including data on maximum permissible speed) from the SD card via the multimedia connection unit

 GPS signals:

 From HERMES control unit (as of 01.06.2019 with code 362 (HERMES LTE))

 From the GPS antenna (up to 31.05.2019 or except code 362 (HERMES LTE))

 Wheel speed signals from the Electronic Stability Program control unit

 Reverse gear signal from electronic ignition lock control unit

 Activation of the menu via the upper control panel control unit (with code 246 (Analog clock))

 Operation via the Audio/COMAND control panel or the touchpad (with code 448 (Touchpad)), volume control via the corresponding lower control panel or via the volume adjustment switch (as of 01.06.2018) of the head unit multifunction steering wheel button group or via the volume control button (up to 31.05.2018) of the instrument cluster multifunction steering wheel button group

 Operation via the head unit multifunction steering wheel button group

 Operation through the voice control system (driver hands-free system microphone)

 Traffic Message Channel (TMC) or comparable radio traffic announcements from radio tuners for FM or digital radio (DAB) integrated into head unit (if no real-time traffic data can be received)

 Real-time traffic data from HERMES control unit (with code 367 (Live Traffic Information) and valid subscription for real-time traffic data) or from tuner unit (with code 536 (SIRIUS satellite radio) and code 522 (Audio 20 radio))

 Updates of map data through the SD card on a PC connected to the Internet

The acoustic driving information is output by the head unit via the front speaker system. If necessary, the head unit reduces the volume of any active audio sources.

On AMG vehicles except code 810 (Sound system) as of 01.06.2018, the head unit sends the voice output via MOST to the Midline sound system amplifier control unit.

In vehicles with CODE 810 (Sound system), the head unit transmits the voice output via the MOST to the sound system amplifier control unit.

The navigation cards and the visual driving instructions are shown on the audio/COMAND display. Driving instructions and menu displays can also be shown on the instrument cluster. The head unit generates the displays using the SD card data provided by the multimedia connection unit.

 Updates on the SD card takes are downloaded externally on an Internet-capable PC; this is described in the operator's manual.

 Model 213
with code 357 (Map navigation)
with code 506 (Audio 20 NTG 5.5 radio)
The map navigation also has the following new properties: Faster processor, search function, acceptance of navigation destinations from the address book and the MB Companion App, support of Car-to-X-Communication telematics service.

Function sequence for map navigation

The head unit accesses the map data stored on the SD card.

 When the SD card is used for the first time in the vehicle, data is written to a configuration file on the SD card by the head unit.

 As GPS operates in the gigahertz range and the signals are weak, the following events may lead to reception interference: Atmospheric interference (e.g.bad weather, water vapor, fog), multiple reception through signal reflexions (e.g.on building walls) or signal shadowing (e.g.in built-up areas, in tunnels, in the vicinity of tall buildings of trees).

In the event of a failure of the GPS signals, the head unit reverts back to the basic position finding. For basic position finding, the head unit evaluates the data from the integrated gyro sensor as well as the reverse gear signal and the wheel speed signals.

The electronic ignition lock control unit transmits the reverse gear signal to the head unit via the user interface CAN.

The Electronic Stability Program control unit transmits the wheel speed signals to the head unit via the chassis FlexRay, electronic ignition lock control unit and user interface CAN.

 Location faults during position finding, rolling backward with circuit 15 OFF or vehicle transportation falsify basic position finding. In both instances, the deviation is automatically corrected by the navigation processor integrated in the head unit upon reception of GPS data.

The upper control panel control unit (with code 246 (Analog clock)) sends the operation signals over the LCP-LIN, Audio/COMAND control panel and telematics CAN to the head unit.

The steering wheel electronics read in the operation signals of the multifunction steering wheel button groups directly. The steering wheel electronics forwards the signals via the following route:

 As of 01.06.2018, via the steering wheel CAN to the steering column tube module control unit

 Up to 31.05.2018, via the steering LIN to the steering column tube module control unit

The steering column tube module control unit sends the control signals over the chassis FlexRay, electronic ignition lock control unit and the user interface CAN to the instrument cluster. The instrument cluster transmits the operation signals to the head unit via the user interface CAN.

The Audio/COMAND control panel or the touchpad (with code 448 (Touchpad)) sends the control signals to the head unit over the telematics CAN.

The voice inputs are recorded by the driver hands-free system microphone and processed further directly by the head unit.

The lower control panel transmits the control signals from the volume control button to the head unit via the UBF-LIN, Audio/COMAND control panel and telematics CAN.

The head unit transmits a switch-on request via the telematics CAN and the generated picture data via the HSVL line to the Audio/COMAND display.

The head unit transmits the information for the display in the instrument cluster to the instrument cluster via the user interface CAN.

On vehicles with code 536 (SIRIUS satellite radio) and code 522 (Audio 20 radio) the real-time traffic data (RTTD) are received by the SDAR antenna, processed by the tuner unit and sent over MOST to the head unit.

On vehicles with code 367 (Live Traffic Information) and valid subscription for real-time traffic data, the HERMES control unit receives the real-time traffic data via the emergency call system 1 antenna (with code 360 (HERMES UMTS) or with code 362 (HERMES LTE)) or the emergency call system 2 antenna (with code 362 (HERMES LTE)) from the service provider as long as the vehicle is within the geographical region for which the traffic data service is being provided.

The HERMES control unit sends the real-time traffic data as follows:

 Over the WLAN to the W-LAN antenna, the data are then read in by the head unit (with code 506 (Audio 20 radio NTG 5.5))

 Over the multimedia connection unit to the head unit (with code 522 (Audio 20 radio))

The HERMES control unit receives position data from the head unit at regular intervals in the opposite direction. The HERMES control unit sends the position data from the head unit over the emergency call system 1 antenna (with code 360 (HERMES UMTS) or with code 362 (HERMES LTE)) over the emergency call system 2 antenna (with code 362 (HERMES LTE)) to the service provider. The HERMES control unit thereby contributes to gathering the traffic information from which the SD card navigation then again benefits.

 At the end of the subscription or outside of the geographical area for which the traffic data service is offered, the radio traffic messages are evaluated for dynamic route guidance.

Without subscription or outside the geographical region for which the traffic data service is being provided, the head unit evaluates the radio traffic announcements (e.g. TMC) for dynamic route guidance. The radio traffic announcements are sent within the head unit from the integrated DAB FM radio tuners to the navigation processor.