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Navigation Mode, Function - GF82.85-P-2012LF

Model 217, 222 up to model year 2018 

G15301133Courtesy of MERCEDES-BENZ USA

Shown on model 222 

G15301134Courtesy of MERCEDES-BENZ USA

Shown on model 217.3 

G15301135Courtesy of MERCEDES-BENZ USA

Shown on model 217.4 

Function requirements for navigation mode in general 

General navigation mode 

The navigation module is integrated in the COMAND controller unit.

The navigation system includes the following functionalities:

The location and direction of movement of the vehicle are continuously determined with the aid of the navigation system. After entering in or selecting a destination location, route calculation starts.

A range of options can be selected for route calculation according to the national version, e.g.:

If observance of the options is not possible, then the options set are ignored for the sections in question and a message is displayed and signaled audibly. The set options can be displayed and changed at any time.

Once calculated, the route is displayed using arrow pictograms on the Audio/COMAND display and this information is also issued as an acoustic notification: "The route is being calculated". If the vehicle deviates from the route, the new route is re-calculated.

If the recalculated values are plausible for the navigation system, then the modified route is displayed.

IMPORTANT Dynamic route guidance (with "Dynamic route", "Dynamic route with confirmation" or "Eco route"): An alternative route is offered under dynamic route guidance, in the event of a sufficiently long traffic jam or road closure on the calculated route.

The navigation system also has lists and map data for points of interest (e.g. restaurants, gas stations, parking lots) which can be selected as a destination or as a stopover.

IMPORTANT Model 217, 222

up to model year 2018

with code 498 (Japanese version)

Routes or destinations can be sent from the Internet via the

Mercedes-Benz Application Gateway to the vehicle and imported into the navigation system.

IMPORTANT Model 217, 222

up to model year 2018

with code 348 (Emergency call/assistant system)

Destination entries or points of interest can be made available to the navigation module of the COMAND controller unit by the Service Center.

IMPORTANT Model 222.163

up to model year 2018

except code 05U (Remote Online)

except code 06U (Mercedes connect me standard services)

except code 360 (HERMES UMTS)

except code 362 (HERMES LTE)

The map data is used for the route-based & foresighted energy management.

The navigation system can be operated using the following controls of the Audio/COMAND control panel:

The signals are sent from the Audio/COMAND control panel over the telematics CAN to the COMAND controller unit.

The navigation system can be operated using the following controls of the left multifunction steering wheel button group:

The navigation system can be operated using the following controls of the right multifunction steering wheel button group:

The control signals of the left multifunction steering wheel button group and the right multifunction steering wheel button group are forwarded as follows:

Steering wheel electronics →

Steering LIN →

Steering column tube module control unit →

Chassis FlexRay →

Electronic ignition lock control unit →

User interface CAN →

Instrument cluster →

User interface CAN →

COMAND control unit

The navigation system can be operated via the voice control system that is integrated in the COMAND controller unit. The voice input is picked up by the hands-free system microphone, converted into an electrical signal and forwarded to the COMAND controller unit over a direct line.

IMPORTANT For the voice control system of navigation, in particular for destination entry, additional name lists are available in the navigation system. Name lists exist for the following information, for example, place names for selected towns/cities on the data storage medium, street names for all towns, town centers and special destinations.

In vehicles with code 816 (Entertainment remote control), with code 867 (SPLITVIEW) or with code 864 (Rear Seat Entertainment System), the navigation system can be operated using remote control.

Unrestricted operation of the navigation system is however, only possible when the remote control is in the "COMAND" mode. In the "SPLITVIEW", "L REAR" or "REAR R" mode, the remote control can only be used to activate the "Drive show" function (the "Drive show" is a sequence of pictures that shows the current position, the route, traffic information along the route, the vicinity of the destination and the altitude course of the previously driven route). The mode is configured using a roller on the remote control. The headphones and remote control antenna receives the Kleer® radio signals from the remote control and forwards them to the COMAND controller unit.

Using the telephone keypad (except code 448 (Touchpad)), the functions of the navigation mode can be operated depending on the context. The control signals of the telephone keypad are forwarded via the following route:

Telephone keypad LIN →

Audio/COMAND control panel →

Telematics CAN →

COMAND control unit

Using the touchpad (with code 448 (Touchpad)), the functions of the navigation mode can be operated. The signals are transmitted by the touchpad via the telematics CAN to the COMAND controller unit.

IMPORTANT The signals from the touchpad are looped through in the Audio/COMAND control panel.

The navigation function consists of the following subfunctions:

IMPORTANT The navigation system uses a special interface to provide data that is used by other systems in the vehicle. The COMAND controller unit sends the data over the user interface CAN.

General GPS position finding (global navigation system) 

The GPS is a satellite-based position finding system, which is available on a global basis. GPS position finding is irretrievable after vehicle transport (e.g. by train or ferry or after towing). Recalculating the GPS position (after satellite reception has been interrupted) can take several minutes (up to 5 minutes during initial commissioning). The accuracy of the position finding and the actual calculation are essentially based on the measurement of the run times of the signals sent synchronously by the various satellites. A vital precondition is the synchronicity of the clocks in the satellites and in the receiver. To ensure synchronicity, the receiver is equipped with an automatic time correction that is possible thanks to the satellite signals.

Additional function requirements for GPS position finding 

GPS position finding function sequence 

The GPS receiver in the COMAND controller unit receives the GPS signals from the multifunction antenna (model 222) or from the GPS antenna (model 217). On vehicles with code 348 (Emergency call/assist system), the GPS signals are received by the multifunction antenna (model 222) or by the GPS antenna (model 217) via the global positioning system antenna splitter. The COMAND controller unit calculates the current position of the vehicle from the GPS signals. The direction of travel is determined with the aid of the sequence of locations calculated with the GPS system.

IMPORTANT As GPS operates in the gigahertz (GHz) 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, due to tall buildings or trees)

General information on basic position finding 

Navigation can be continued without a GPS signal using basic position finding. A defect e.g. of the multifunction antenna is therefore not immediately recognizable.

Basic position finding runs parallel to GPS position finding. For basic position finding the COMAND controller unit requires the following information:

Basic position finding function sequence 

For basic position finding, the COMAND controller unit requires signals from the following components:

The Electronic Stability Program control unit sends the data via the following route:

Chassis FlexRay →

Electronic ignition lock control unit →

User interface CAN →

COMAND control unit

The data of the sensors integrated in the COMAND controller unit is forwarded within the COMAND controller unit. The current vehicle position (longitude and latitude) is then calculated in the COMAND controller unit. The basic position finding calculation is performed approx. once per second.

IMPORTANT Position finding errors in position finding, rolling backwards with "circuit 15 OFF" (ignition switched off) or transport of the vehicle falsify the basic position finding. In both instances the deviation is automatically corrected by the COMAND controller unit's integrated navigation processor upon reception of GPS data.

Calibration 

The calibration following a tire replacement is performed automatically.

Recalibration 

Because of the tire abrasion, a constant recalibration of the tire circumference is required. Recalibration is performed automatically. Recalibration of the tire circumference uses the difference between the calculated and actually traveled distance between two turning points determined with the aid of map-based position finding.

General information on route calculation 

Route calculation is accomplished using the options set to the best possible extent. If observance of the options is not possible, then the options set are ignored for the sections in question and a message is displayed and signaled audibly.

The set criteria and options can be displayed and changed at any time. Acoustic information is output ("Route is being calculated") and following successful calculation the route is displayed on the map.

Route guidance function sequence 

The integrated navigation processor continuously compares the route calculation data with the position finding data and uses the data to deduce measures for further route guidance. The route guidance is carried out by outputting visual and acoustic information and is divided up into the following areas:

Map route guidance 

Signals for visual depiction of the route guidance (map navigation) are generated by the COMAND controller unit and transmitted to the Audio/COMAND display via an LVDS line. The Audio/COMAND display is switched on over the telematics CAN by the COMAND controller unit.

Route guidance through driving lane recommendations 

For certain turnoff situations on multiple-land exit points (e.g. freeway intersection) driving lane recommendations are shown in the bottom line. In addition, when a turnoff recommendation is given, the distance to the actual turnoff point is also displayed by means of a bar graph. The lanes have arrows assigned to them, which indicate on which lane the destination can be reached or the best way to reach it. With day design, the following colors are used in the Audio/COMAND display:

White: best or recommended lane

Light gray: the lane is correct, but a lane change will soon be required.

Dark gray: this lane will not take you to the destination.

Route guidance by means of voice output 

Route guidance by means of voice output is an assistance function that assists the driver without distracting him from the traffic. Voice is output with the selected system language.

The navigation system route guidance is supported by voice output e.g. with the following information:

Further voice messages take place, e.g. at the start of route calculation, when an intermediate destination has been reached, or when the destination has been reached.

During dynamic route guidance, additional voice messages are issued due to traffic messages affecting the route. In some cases, special information is also issued via voice output in certain circumstances, e.g.:

The COMAND controller unit's navigation processor links word segments during a voice output to form complete instructions or information.

IMPORTANT During active voice output, the announcement volume can be adjusted using the following control elements: Audio/COMAND control panel volume adjustment button, + and - button, adjustment of specific functions, and volume adjustment of the right multifunction steering wheel button group or remote control.

In vehicles except code 810 (Sound system) and except code 811 (Advanced sound system) the voice output is forwarded to the speaker system by the COMAND controller unit.

In vehicles with code 810 (Sound system) or code 811 (Advanced sound system) the COMAND controller unit transmits the voice output via the MOST to the sound system amplifier control unit. The sound system amplifier control unit amplifies the signals and forwards them to the speaker system.

General information on dynamic route guidance 

Dynamic route guidance takes place in "Dynamic route", "Dynamic route with confirmation" or "Eco route" mode (except code 494 (USA version) and except code 498 (Japan version)). During dynamic route guidance the current traffic situation is taken into consideration when appropriate traffic data is received. The traffic data recorder decodes the traffic information and forwards it internally to the navigation processor upon request. The navigation processor makes the decision whether the route should be changed.

During dynamic routing with confirmation, the user is notified of the effects of the route change on the travel distance and driving time. The route is only changed with the user's agreement.

If necessary, a message that the route should be changed is output via the speaker system.

Function sequence for dynamic route guidance (except code 494 (USA version), except code 498 (Japan version), except code B54 (Live Traffic Information) and except code 367 (Live Traffic Information)) 

The incoming information about the traffic situation can be received by the Radio Data System/Traffic Message Channel (RDS/TMC) function via FM radio or digital radio (DAB) (with code 537 (Digital radio (DAB))) if an appropriate station has been selected.

The FM receiver in the COMAND controller unit receives the traffic messages over the following path, and forwards them to the traffic data recorder in the COMAND controller unit:

Rear window antenna (model 217.3 and model 222) or windshield antenna (model 217.4)

FM, AM, CL, DAB and KEYLESS-GO antenna amplifier or FM 2 and DAB antenna amplifier →

COMAND control unit

On vehicles with code 537 (Digital radio (DAB)), the DAB band III signals are forwarded via the following route on model 217.3 and model 222:

Rear window antenna →

FM 2 and DAB antenna amplifier or TV 2 and DAB band III antenna amplifier →

Tuner unit →

MOST →

COMAND control unit

On vehicles with code 537 (Digital radio (DAB)), the DAB band III signals are forwarded via the following route on model 217.4:

Windshield antenna →

FM 2, DAB and TV 1 antenna amplifier or TV 2 and DAB band III antenna amplifier →

TV and DAB antenna splitter (with code 537 (Digital radio (DAB)) and with code 865 (TV tuner)) →

Tuner unit →

MOST →

COMAND control unit

Function sequence, Vehicle Information and Communication System (VICS) via FM multiplexer (with code 498 (Japan version)) 

The driver is provided with vital information by the VICS on the current traffic situation. Traffic impairments and traffic jams are shown on the map, however they are not incorporated into the dynamic route guidance. The radio antenna signal path is as follows:

Rear window antenna (model 217.3 and model 222) or windshield antenna (model 217.4) →

FM, AM, CL, DAB and KEYLESS-GO antenna amplifier →

COMAND control unit

The VICS information is processed in the FM multiplexer integrated into the COMAND controller unit. The information is then shown via the low voltage differential signaling line on the Audio/COMAND display.

Function sequence for dynamic route guidance with VICS (with code 498 (Japan version), dealer option) 

The Vehicle Information and Communication System (VICS) control unit and the Dedicated Short-Range Communications control unit are required for dynamic route guidance. The Vehicle Information and Communication System (VICS) control unit contains both the receiver and the antenna. The antenna communicates with the VICS beacons (transmitter masts) installed at the roadside which transmit microwave signals within a 2.5 gigahertz reception range or infrared signals. The received signals are transmitted directly to the COMAND controller unit and decoded.

The Dedicated Short-Range Communications control unit receives VICS signals in the 5.8 gigahertz reception range via the DSRC antenna, and forwards them to the COMAND controller unit. The traffic messages are stored in the traffic data recorder of the COMAND controller unit, decrypted and forwarded to the navigation processor on request.

Function sequence for dynamic route guidance with Real Time Traffic Data (RTTD) (with code 536 (SIRIUS satellite radio)) 

RTTD are real-time traffic data that is transmitted through the "Sirius" satellite radio provider and the reception and processing of the data is made possible by the tuner unit. The real time traffic data contain accident and traffic jam messages as well as traffic flow information.

The real-time traffic data is available around the major cities in the USA, and is transmitted every 5 minutes.

The tuner unit receives the real-time traffic data via a direct line from the multifunction antenna (model 222) or from the SDAR antenna (model 217), and makes them available to the COMAND controller unit navigation system via MOST. The COMAND controller unit uses the data to compute alternative routes and shows it via an LVDS line on the audio/COMAND display.

Function sequence for dynamic route guidance with real-time traffic data via the telematics services communications module (with code B54 (Live Traffic Information)) or via the HERMES control unit (with code 367 (Live Traffic Information)) 

On model 222, the real-time traffic data is transmitted via the following route:

Left emergency call system antenna or right emergency call system antenna →

Emergency call system antenna splitter (with code B54 (Live Traffic Information)) or telephone antenna splitter (with code 367 (Live Traffic Information)) →

Telematics services communications module (with code B54 (Live Traffic Information)) or HERMES control unit (with code 367 (Live Traffic Information))

IMPORTANT Model 222 as of 11/18/13 up to 5/31/16

up to model year 2017

except code 386 (Comfort telephony)

The real-time traffic data is transmitted via the following route:

Multifunction antenna →

Telematics services communication module

IMPORTANT Model 222 as of 6/1/16

as of model year 2017 up to model year 2018

except code 386 (Comfort telephony)

The real-time traffic data is transmitted via the following route:

Multifunction antenna →

HERMES control unit

In model 217.3/4, the telematics services communications module (with code B54 (Live Traffic Information)) receives the real-time traffic data via the telematics services antenna.

In model 217.3/4, the HERMES control unit (with code 367 (Live Traffic Information)) receives the real-time traffic data from the telematics services antenna.

In model 217.3 as of 01.06.2015 up to 31.05.2016 with code B54 (Live Traffic Information) and code B24 (Remote control for stationary heater), the telematics services communications module receives the real-time traffic data from the telematics services antenna via the mobile phone and stationary heater radio remote control antenna splitter.

In model 217.3 as of 01.06.2016 with code 367 (Live Traffic Information) and code B24 (Remote control for stationary heater) the HERMES control unit receives the real-time traffic data from the telematics services antenna.

The telematics services communications module (with code B54 (Live Traffic Information)) or the HERMES control unit (with code 367 (Live Traffic Information)) transmits the real-time traffic data via a direct line (Universal Serial Bus (USB)) to the COMAND controller unit.

The telematics services communications module (with code B54 (Live Traffic Information)) or the HERMES control unit (with code 367 (Live Traffic Information)) receives cyclic position data from the COMAND controller unit via a direct line (USB).

The telematics services communications module (with code B54 (Live Traffic Information)) or the HERMES control unit (with code 367 (Live Traffic Information)) transmits the position data to the service provider in model 222 via the emergency call system antenna splitter (with code B54 (Live Traffic Information)) or the telephone antenna splitter (with code 367 (Live Traffic Information)), the left emergency call system antenna or the right emergency call system antenna or in model 222 (except code 386 (comfort telephony)) as of 18.11.2013 via the multifunction antenna.

The telematics services communications module (with code B54 (Live Traffic Information)) or the HERMES control unit (with code 367 (Live Traffic Information)) transmits the position data to the service provider via the telematics services antenna in model 217.3/4 or via the mobile phone antenna splitter and stationary heater radio remote control and via the telematics services antenna in model 217.3 as of 01.06.2015 up to 31.05.2016 with code B54 (Live Traffic Information) and code B24 (Remote control for stationary heater).

In this way, the telematics services communications module (with code B54 (Live Traffic Information)) or the HERMES control unit (with code 367 (Live Traffic Information)) contributes to putting together the traffic information from which the dynamic route guidance then again benefits.

Map function 

Map display is always controlled by the COMAND controller unit. The following display functions are supported:

Expanded functions of the navigation mode 

The navigation system is extended with regard to convenience, customization and tourist information by the following functions:

The extended functions of the navigation mode are converted internally in the COMAND controller unit and - where applicable - shown over the LVDS line on the Audio/COMAND display.

The "Drive Show" function can be shown on the Audio/COMAND display in the front passenger's field of vision in vehicles with code 867 (SPLITVIEW) and also in the rear passenger compartment in vehicles with code 864 (Rear Seat Entertainment System). The online map display and Mercedes-Benz "Travelguide" (accessories) can also be used in the rear passenger compartment (with code 864 (Rear Seat Entertainment)). The COMAND controller unit sends the signals over MOST to the Rear Seat Entertainment system controller unit for display in the rear.

  Electrical function diagram for navigation mode (COMAND), function Model 217 up to model year 2018 PE82.85-P-2063-97SEC
    Model 222 up to model year 2018 PE82.85-P-2063-97SEA
  Overview of system components, telematics   GF82.85-P-9999LF
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