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

GF82.85-P-2012CAA Navigation Mode, Function
MODEL 207.3 /4
- with CODE (527) COMAND APS with single DVD drive (with navigation)
- except CODE (498) Japan version
MODEL 207.3 /4
- with CODE (512) COMAND APS with DVD changer

Function requirements for navigation mode in general
^ Circuit 30g ON
^ Signals from at least 3 Global Positioning System (GPS) satellites present

Navigation mode, general
The navigation module is integrated into the COMAND controller unit (A40/3). The navigation system includes the following functionalities:
- Position determination
- Route planning, route calculation and destination-oriented navigation
- Visual driving instructions in form of pictograms
- Intersection zoom
- Acoustic driving recommendations
- Display of navigation maps
The location of the vehicle, as well as the direction and distance to the destination are determined with the aid of the navigation system after entering the following information:
- Country or federal state (with code (494) USA version)
- Place name
- Street
- Intersection or house number (depending on the availability of the data)
- Town center
- Postal code
- Special destinations
- Destination entry via map
After entering or calling up a destination location, route calculation starts. The route between the current vehicle position and the destination is calculated. In the "Route settings" (as of 1.7.2011) or "Mode" menu (up to 30.6.2011) the following parameters can be selected:
- "Short route"
- "Dynamic route" (without code (494) USA version)
- "Eco route" (as of 1.6.2010)
- "Fast route"
- "Avoid freeway"
- "Avoid toll roads"
- "Avoid tunnels"
- "Avoid ferries"
- "Avoid car trains"
- "Avoid toll sticker roads" (without code (494) USA version)
In the "Points of interest" menu the "In destination area ", "Current position", "Other location" and "Search using names" menu items are supported. After entering or calling up a destination location, route calculation starts. The following points of interest categories have been defined (examples):
- "Active sport"
- "Pharmacies"
- "Car rental"
- "Railroad station"
- "Bank"
- "Library"
The system can be activated or deactivated or the destination and street can be entered using the following components:
- Left multifunction steering wheel button group (S110) and right multifunction steering wheel button group (S111)
- Audio/COMAND control panel (A40/9)
- Control panels on the COMAND controller unit
- Voice control system (VCS [SBS])

Function sequence for navigation mode
The navigation processor integrated into the COMAND controller unit calculates the data entered for reaching the destination (navigation). Further subfunctions are described in separate documents:
^ Position finding and destination-oriented navigation, function
^ Route guidance through voice output, function
The route is calculated according to the options set. 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 configured criteria and options can be displayed and changed. Once calculated, the route is displayed using arrow pictograms on the Audio/COMAND display (A40/8) and this information is also issued as an acoustic notification: "The route is calculated".
If the vehicle is no longer moving on the pre-calculated route, then the route is recalculated. If the recalculated values are plausible for the navigation system, then the modified route is displayed.
Dynamic route guidance (without code (494) USA version): With the dynamic route guidance, an alternative route is offered if a traffic jam or road block exists on the calculated route.
The signal path for the control signals of the left multifunction steering wheel button group and the right multifunction steering wheel button group to the COMAND controller unit is as follows:
- Steering wheel electronics (N135)
- Steering LIN (LIN E1)
- Steering column tube module control unit (N80)
- Chassis CAN (CAN E)
- Instrument cluster (A1)
- Interior CAN (CAN B)
When entered using the Audio/COMAND control panel, the control signals are sent via the telematics CAN (CAN A) to the COMAND controller unit. When entries are made via the control panels on the COMAND controller unit, the control signals are processed within the unit. Voice input takes place via the hands-free system microphone (A67b1). The signals from the hands-free system microphone are routed over a direct line to the COMAND controller unit.
For voice control of navigation, in particular for destination entry, additional name lists are available in the system. The following lists are available for the voice control system:
- List of place names for selected towns on the data storage device
- Street name list for all towns/villages
- List of the relevant intersecting street
- Town center list

Updating the map data
The map data is installed on the hard disk of the COMAND controller unit. In order to install new card data, this must be copied from a navigation DVD. This procedure should be performed with the vehicle at a standstill, where possible. To ensure that the on-board electrical system voltage does not run down, the engine should be running here or the vehicle supplied with external voltage.
If the navigation DVD is inserted in the COMAND controller unit, a prompt automatically appears asking whether the map data is to be installed.
Following confirmation that the map data is to be installed, the installation takes place (t = 10 to 120 min.). Navigation is only possible following complete installation.
If the installation procedure is interrupted, it must be continued and completed. Following successful installation, a corresponding message appears and the DVD is automatically ejected.