MERCEDES-BENZ ML430 1997 Complete Repair Manual

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

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1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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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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The navigation system can be activated by pressing the" NAVI" button on the control module.
A navigation processor with CD drive for the digital map data is integrated (optional) into the radio and
navigation module (A2/56)
The navigation CD drive can also play audio CD's .
Destination entry
The destination can be entered with menu-guidance on the control module and is processed by the navigation
processor . It is only possible to enter destinations which are stored on the CD-ROM .
Location finding
the radio and navigation module (A2/56) continuously calculates the vehicle location with the aid of the
following procedures:
GPS location finding
Basic location finding (dead reckoning)
Map-supported location finding (map matching)
The navigation processor calculates the most probable position by permanently comparing the location results
of these three methods.
Route calculation
The route calculation is accomplished in the navigation processor after the destination is entered or
automatically following a deviation from the suggested route.
The calculated route is stored in the navigation processor .
Route guidance
After the navigation processor has calculated the route guidance starts.
Route guidance is accomplished graphically with a digital map with direction arrows as well as with the aid of
the voice output on the vehicle loudspeakers. When the " NAVI VOICE " button is pressed the last current
navigation command is repeated. The volume of the voice output can be set on the volume knob during a
navigation command. The following functions are available in the navigation mode:
When the" NAVI MENU " button is actuated the main navigation menu opens.
All other entries can be made with the " joystick ".
"Dest" (destination entry)radio and navigation module (A2/56) offers the following possibilities for
destination entr
y:

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1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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Address
Junction (intersection)
Selecting hotel, church or point of interest
Direct entry on map (map cursor)
Calling up stored destination (recent route)
Address book
Selection of address in date book (today's plan)
After selecting one of these possibilities, e.g. address, it is possible to proceed with the entry of additionally
required information. Incorrect entries can be erased with " Delete " Spaces can be entered with " Space ".
After completely entering the information confirm by pressing the "joystick " (Ent).
"OK to proceed " starts calculation of the route.
Setup (settings)
Various settings for the screen display and route guidance can be made with this menu.
Option (selection)
With this menu information, e.g. location, can be called up.
Entries in address book, in date book or in list of last driven routes can be processed by selecting
correspondingly.
Route
This menu provides settings influencing the current route guidance.
This menu can only be called up during route guidance.
Detour multifunction key
Pressing the multifunction key" DETR " causes the navigation processor to calculate the closest possible
alternative route, e.g. in the case of traffic jams, constructions sites, etc.
STOP multifunction key
Route guidance can be terminated by pressing multifunction key" STOP ".
LIST multifunction key
Pressin
g multifunction key" LIST " calls up a list of roads to be driven in the current route guidance.

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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MUTE multifunction key
Muting voice output.
MAP multifunction key
Changing between map display and direction arrow display
Pressing the "Clear " key returns to the previous menu.
STARGUIDE, FUNCTION - GF82.85-P-2014GI
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
The StarGuide system uses the availability of the present technologies for telecommunications.
These are used for the purpose of personal information services.
The service "Dynamic route guidance " will be added to the system at a later time.
Technical requirements:
E-Call and
MCS and
newest navigation CD (it includes the current software for executing the offered services). The MCS is
updated with this and
the prerequisites required for executing the corresponding systems are fulfilled.
Organizational prerequisites:
Constant map
matching,
function GF82.61-P-
2002GI
Route
calculation,
function GF82.61-P-
3011GI
Guidance,
function GF82.61-P-
3012GI
Voice output,
function GF82.85-P-
3001GI
Volume/tone
adjustments,
function GF82.60-P-
2003GI

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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GPS G lobal P ositioning S ystem. Satellite-supported system for precise positioning and navigation. At
present 26 satellites are in operation orbiting the earth on 6 orbits.
AMPS: A dvanced M obile P hone S ystem. The AMPS network is now available to 98% of the
population in the most densely-populated areas of the USA .
SOC: S ervice O perating Center. The SOC takes over all individual requirements of the driver and
transmits the corresponding information to the vehicle.
Concept of personal information service:
Individual information and news transmission according to personal interest profile (stock exchange,
weather, sport...)
Transmitting a request via a button (SVC button) to the S ervice O perating C enter (SOC )
e S ervice O perating C enter (SOC ) transmits the customer profile corresponding to the individual
information and news.
The data transmitted is indicated on the display of the radio and navigation module (A2/56) and can
then be read.
VOICE OUTPUT, FUNCTION - GF82.85-P-3001GI
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
Information
service,
function GF82.85-P-
3016GI
Data
transmission
for Starguide,
function GF82.85-P-
3017GI

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Fig. 90: MCS Voice Output Block Diagram
The navigation system guidance feature is supported significantly by voice output .
The voice data was originally stored as single-word segments on the navigation CD-ROM . This data set is
transmitted automatically by the CD-ROM to the navigation processor and stored there.
The navigation processor interlinks these word segments to complete instructions or information and generates
corresponding AF signals. The generated AF signals are transmitted internally in the radio and navigation
module (A2/56) to the audio signal processing if required, amplified there and output via the vehicle
loudspeakers.
With the sound system (code 810) the voice signals are transmitted to the sound amplifier (A2/13) from the
audio signal processing via the digital data bus ( D2B ), amplified there, and then output via the vehicle
loudspeakers.
Several short, sequential drive recommendations are compiled to one single voice output.
Loading voice from CD-ROM
Only English is presently available for voice output on the radio and navigation module (A2/56) .
Volume of voice output
The voice output volume can be adjusted during voice output . This ensures that a defined interval is
maintained between the volume of the current audio source and voice output.
Example:
If the volume is reduced during voice output and the preceding volume interval to the audio signal is not
reached the radio and navigation module (A2/56)

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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reduces the level of the audio signal until the specified volume interval is reached again. The volume of the
audio signal is then again increased after completion of the voice output to the level present before the voice
output.
Moreover, the volume of the voice output cannot be reduced below a certain minimum level .
Voice output mute circuit
Navigation voice output can be muted by actuating the mute multifunction key. Muting remains active until the
mute multifunction key is pressed again.
INFORMATION SERVICE, FUNCTION - GF82.85-P-3016GI
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. 91: Service Request Display Using SVC Button (Example)

Service request procedure
It is possible to change to the service mode with the button " SVC" on the radio and navigation module
Navigation mode, function GF82.85-P-2012GI
Radio and navigation
module, location/purpose/
design/function GF82.61-P-4109GI

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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(A2/56) .
A new request is selected in the basic screen " SVC ":
"Send New Request for Info Service "
or optionally:
"View Info Service of..."
allows a previous data record to be viewed.
Selection is possible with the knob/pushbutton on the radio and navigation module (A2/56) and confirmed by
pressing. If" Send New Request for Info Service " is selected, the radio and navigation module (A2/56)
transmits this request via the digital data bus ( D2B ) to the E-call control module (A35/8) and CTEL
transmitter/receiver (A35) . It transmits the request to the service provider via the present telephone network.
The request is processed on the Internet on the basis of the personal information profile and sent to the vehicle
via the telephone network.
A tone and the message:" New Info Received! " indicates reception to the user. The safety question:" Read
Later When Stopped? " with the decision " Yes " or "No " serves for traffic safety.
Selecting:" Yes " leads to a return to the previous menu such as radio, CD, navigation......
Selecting:" No " lists the news according to the personal interest profile.
The messages can be read in sequence. Pressing the knob/ pushbutton button on the radio and navigation
module (A2/56) jumps to the next news item. Turning the knob/pushbutton on the radio and navigation
module (A2/56) scrolls the news. With the" BACK " button on the radio and navigation module (A2/56) it is
always possible to jump back to the previous menu.
The information that is received can be read page by page. It is not possible to jump directly to a certain
page. The format can be changed by the operator.
DATA TRANSMISSION FOR STARGUIDE, FUNCTION - GF82.85-P-3017GI
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 (316) MB GSM cellular telephone (D2B) with CODE
(818b) Single CD player - additional unit with CODE (491) U.S. version
Starguide, functionAs of 09/00GF82.85-P-2014GI
Data transmission for
Starguide, functionAs of 09/00GF82.85-P-3017GI

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Fig. 92: Connection Schematic Between Vehicle And Center Via Mobile Telephone
System concept of information service:
The vehicle owner determines his own interest profile for service information such as world news or stock
exchange data. He transmits the desired information to the Mercedes Benz Customer Service. This profile is
indicated to the S ervice O peration Center (SOC ).
With the" SVC " button on the radio and navigation module (A2/56) it is possible to transmit an update
request for service information to the S ervice O perating C enter (SOC ).
In the S ervice O peration C enter (SOC ) this customer profile is used for selecting information. The desired
information is compiled by the information provider and transmitted to the vehicle via the S ervice O peration C
enter (SOC ).
The data transmitted is indicated on the display in the radio and navigation module (A2/56) .
Starguide, function GF82.85-P-2014GI
Information service,
function GF82.85-P-3016GI
Telephone mode,
function GF82.85-P-2007GI
Modular control system
(MCS), function GF82.85-P-0011GI

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