Mercedes-Benz ML320. Service manual - part 252

NAVIGATION MODE, FUNCTION - GF82.85-P-2012GH

MODEL 163

Fig. 88: COMAND Navigation System Block Diagram

Function

The navigation system is integrated into the COMAND operating, display and control module (A40/3) . The
location of the vehicle and the direction to and distance from the destination (according to specified
destination) are determined with the aid of this system. Afterwards the required measures for reaching the
destination are initiated (destination finding) .

The navigation system is activated by pressing the " NAVI " button on the operating unit.

A navigation processor with CD drive for the digital map data is integrated in the COMAND operating,
display and control module (A40/3) .

The navigation CD drive can also play audio CDs .

location/purpose/design/ function

2001 Mercedes-Benz ML320

1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis

Note in Navi-CD screen :

"Please insert Navi-CD type DX "

Destination entry

Destination input is performed menu-guided on the operating unit and processed by the navigation processor .
Only destinations that are also on the CD-ROM may be entered. The COMAND operating, display and
control module (A40/3) provides the following destination input capabilities:



Address...



Destination memory...



Destination using map...



Special destinations (e.g. railway station, airport etc.)



Travel guide...



Intermediate destination entry



Destination memory with individual destination designation capabilities



Final destination...



Dynamic route calculation by:



Blocking of route sections (traffic-jam function)



Traffic-jam ahead



Blocking in route list



Incorporation of traffic information of an external service provider via telephone TCS (once, cyclic every
t=15min. ). Chargeable services.



Incorporation of traffic information via RDS broadcast (TMC ), free of charge

Predictive speller (editor)

During the entry of the destination the missing letters are augmented for an available list. This is only active in
the political index and relates to the destination and road entry as part of the destination finding. In the menu
Special destinations the submenus" Bypassing other locations... " and "National destinations... "are assisted.

The "Supraregional destination... " menu is divided up into additional submenues. The individual menu
points in this submenu use the political index .

Dynamic addition

implemented during manual entry of the destination. During the entry of the destination the missing letters are
augmented for an available list. The added letters are highlighted in black. Deleting is done one character at a
time.

Position finding

2001 Mercedes-Benz ML320

1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis

COMAND continuously calculates the location of the vehicle with the aid of the following procedures:



GPS position finding



Basic position finding (compound position finding)



Map-supported position finding (map matching)

The navigation computer calculates the most probable position by continuously comparing the position-
finding results returned by these three methods.

Route calculation

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

In the dynamic destination-finding system the route calculation is automatically influenced by the
incorporation of traffic information, free of charge via RDS, TMC or over an external provider TCS by
telephone (chargeable).

The calculated route is stored in the navigation processor .

Destination-finding system

Destination finding is started once the navigation computer has performed the destination calculation.

Three display options are available for graphical representation of the destination-finding system:

1. with map

2. with map and symbol display before turn-off point

--> MIX mode

3. with symbol display only (route guidance symbols)

Any of the three methods can be used. The destination-finding system is also supported by voice output from
the vehicle loudspeakers.

Route computation,
function

GF82.61-P-3011GH

Constant map matching,
function

GF82.61-P-2002GH

Basic location finding,
function

GF82.61-P-3006GH

Destination-finding
system, function

GF82.61-P-3012GH

Destination finding in

GF82.61-P-4000GH

2001 Mercedes-Benz ML320

1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis

NAVIGATION MODE, FUNCTION - GF82.85-P-2012GI

MODEL 163 as of 1.9.01 with CODE (522) Modular control system (MCS) radio USA with CODE (357)
Navigation system - additional unit with CODE (818b) Single CD player - additional unit with CODE
(491) U.S. version

Fig. 89: Identifying MCS Navigation System Block Diagram

Function

The navigation system (optional) is integrated into the radio and navigation module (A2/56) .

With this system the vehicle location and the direction and distance to destination (after entering destination)
are determined. Then the required measures are taken to reach the destination (guidance ) .

digitized map area,
function

Destination finding in
non-digitized map area,
function

GF82.61-P-4001GH

Volume/tone
adjustments, function

GF82.60-P-2003GH

Global positioning
system location finding,
function

GF82.61-P-3007GH

2001 Mercedes-Benz ML320

1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis

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