Route calculation, function - GF82.61-P-3011R

MODELS 203.0 /2 /7 up to 23.4.04 with CODE (352a) COMAND operating and display system with CODE (491) U.S. version 

After inputting the destination on the COMAND operating, display and control unit (A40/3), the route is calculated and constantly updated by the navigation processor  . This can only be calculated within the digitalized map areas. The calculated route is the prerequisite of the destination guidance system.

Route calculation 

The navigation processor uses the Compact Disk (CD) map data to calculate the entered destination and the current position on the route. It takes roads and attributes such as, e.g. one-way roads, turning prohibitions and road classes (insofar as these are available), which are read from the CD map, into consideration during calculation. Here, it is possible for the operator to indicate how the route is to be calculated.

The following belongs to the various calculated routes:

• Fastest route
• Shortest route
• Own selection

Under "Own selection", the following stretches can be blocked from the route calculation:

• FREEWAY
• FERRY
• TOLL

Following the calculation of the route, the navigation processor generates a list of roads and junctions to be driven along. This route list is used for destination guidance. It may also be displayed by calling up the "Information" menu.

Route updating 

When the driver deviates from the calculated route, a new route list is calculated by the navigation processor. For this purpose, the current position and direction of motion are taken into consideration and the new route optimized accordingly. The message "New Route" appears in the display ("NEW RTE" appears in the instrument cluster (A1)).

Journeys outside of the digitized map area 

If the vehicle leaves the digitized CD map area (e.g. driving in multilevel parking building), routes cannot be calculated or updated. "OFF ROAD" appears on the display. Upon leaving the map boundary (e.g. foreign country), the message "OFF MAP" appears. Destinations which lie outside of the digitalized map area cannot be taken into consideration on calculation of the route.

	Operating, display and control unit, location/task/design/function		GF82.85-P-3114R
	Destination guidance, function		GF82.61-P-3012R
	Dynamic route guidance, function		GF82.61-P-4003R