Navigation mode, function

Function requirements

 Status "Circuit 30 ON"

 The Cockpit Management and Data System (COMAND) is switched on, authorized and operating error-free

 Fault-Free Global Positioning System (GPS) reception

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General

The navigation module, including navigation processor and DVD drive for the digital map data is integrated in the COMAND operating, display and controller unit (A40/3). The navigation system includes these functions:

- Position finding

- Route planning, route calculation and destination-oriented navigation

- Display of navigation maps

- Intersection zoo

- Visual driving instructions in form of pictograms

- Acoustic driving instructions by means of voice output

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The location of the vehicle, as well as the direction and distance to the destination (after entering the destination) are determined with the aid of the navigation system.

The data for reaching the destination (destination-oriented navigation) is calculated by the navigation system, and the user is guided to the destination with the assistance of visual and acoustic driving instructions.

The following subfunctions are described in separate documents:

 Position finding and destination-oriented navigation, function

 Route guidance through voice output, function

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Operating instructions

The system can be activated or deactivated or the destination and street can be entered using the following components:

- Control panels on the COMAND operating, display and controller unit

- Voice control, with code (813) Voice control system (VCS [SBS])

When entries are made via the control panels on the COMAND operating, display and controller unit, the control signals are processed within the unit. With code (813) Voice control system (VCS [SBS]) voice input takes place using the hands-free system microphone group (A67b1). The words that are spoken are converted into an electrical signal by the hands-free system microphone group and routed to the COMAND operating, display and controller unit as follows.

- Direct line

- Voice control system control unit (A35/11)

- Media Oriented System Transport (MOST)

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Function sequence

The function is divided into the following procedures:

 Destination entry

 Position finding

 Route calculation

 Destination-oriented navigation

Destination entry

The destination is entered menu-assisted on the COMAND operating, display and controller unit and is processed by the navigation processor.

The COMAND operating, display and controller unit offers the following options for destination input:

- Address entry

- Position entry

- Destination memory

- Destination via map

- Special destinations (e.g. railroad station, airport, etc.)

- Travel guide

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 An assistant is available for destination and street name entry. While entering a destination, the letters which are still missing are completed from an existing list. The added characters are highlighted in black. Deletion is done by character.

 The "Special Destinations" menu is supplemented by the "Bypassing other Locations" and "National Destinations" submenus. The "National Destinations" menu is subdivided into an additional submenu.

Position finding

The navigation processor in the COMAND operating, display and controller unit constantly compares the position finding results of the following 3 processes to calculate the most likely position.

- Basic position finding

- GPS location finding

- Map-based position finding

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Route calculation

The route is calculated by the navigation processor in accordance with the specified destination, or automatically, after a deviation from the suggested route has taken place.

With the dynamic destination-oriented navigation system, the route calculation is automatically influenced by incorporating traffic information via the Traffic Message Channel (TMC).

The calculated route is stored in the navigation processor.

Destination-oriented navigation

Destination-oriented navigation starts once the navigation processor has carried out the route calculation. 3 types of display can be selected for graphic destination-oriented navigation:

- with map

- with map and symbol display before turn-off points

- with symbol display (sign symbols)

It is possible to change arbitrarily between the 3 types of presentation. In all instances the destination-oriented navigation is backed up by voice outputs over the vehicle speakers.

 If the navigation DVD is not inserted, the message "Please insert Navi DVD type DX" appears on the navigation display. This instruction is displayed to ensure that the customers insert the correct DVD. The navigation DVD drive can also play audio CDs.