1997 MERCEDES-BENZ ML320 navigation system

Fig. 85: MCS Cassette Mode Block Diagram
Playback of compact discs
When the" Open " button is pressed the display opens au tomatically releasing the slot for the compact cassettes
( CC ) and c ompact d iscs ( CD ). When the radio and navigation module (A2/56) is switched on the CC is
pulled in automatically after it has been inserted beyond a pressure point. Then the playback of the CC starts
with side 1 which is the side of the CC pointing upward. If a CC is defective or is wound too tightly, the
message (" Tape Error, Tape may be to tight ") appears on the display.
Fig. 86: Identifying CD Slot And CC Slot

The following functions are avai lable for playback of the CC :
Auto reverse

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electr ical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:06 PMPage 140 © 2006 Mitchell Repair Information Company, LLC.

By pressing the multifunction key" Side" the side of the CCcan be changed. This is indicated on the
display by" Side 1 " or" Side 2 ". The side changes automatically when the end of the tape is reached.
Fast forward/rewind
Pressing the "joystick " to the left right causes the CC to be wound backward and forward at high speed.
The procedure can be stopped by pressing the" joystick" again in any direction. When the end of the tape
is reached the side is changed automatically and playback continues.
Music search
The music search feature can be started by pressing the " joystick " upward for forward or downward for
rewind. During the search "MS FWD " or "MSREW " appears on the display. As soon as sufficiently
large pause ( approx. 3 s ) is recognized, the search stops and playback starts automatically. The search
can be stopped manually by pressing the" joystick " in any direction.
Scan function
The multifunction key" Scan " causes all titles on the CC to be played for approx. 8 s . . Pressing the
multifunction key" Scan " again stops this procedure.
Dolby B
Actuating multifunction key" Dolby " activates this function. The Dolby system appears inverted on the
display. Pressing again deactivates this function.
Pause "II"
The following events cause the function to change from "Play " to "Pause ":
Pressing multifunction key "Pause " (display changes from "II " to "Play ").
By an incoming or outgoing call
Switching over to another audio mode.
Pause recognition
Pressing the multifunction key" Skip " activates or deactivates the pause recognition function. If a pause
of more than 15 s . is recognized the drive changes automatically to fast forward. If this function is
activated the display appears inverted.
NAVIGATION MODE, FUNCTION - GF82.85-P-2012B
MODEL 163, 168, 170, 208, 210 with CODE (353) Audio 30 APS
Volume/tone
adjustments, function GF82.60-P-2003GI

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:06 PMPage 141 © 2006 Mitchell Repair Information Company, LLC.

Audio 30 APS block diagram in navigation mode
Fig. 87: Audio 30 APS In Navigation Mode Block Diagram

The location of the vehicle as well as the direction and distance to the destination (according to destination
entered) is determined with the aid of the navigation system. Then the required measures to reach the
destination are started (guidance) .
The navigation system can be activated by pressing the "NAV" button on the radio and navigation unit
(A2/56) .
A navigation processor with CD-ROM drive is integrated into the radio and navigation unit (A2/56) for
reading in the navigation data (digital map, speech segments and software).
The navigation CD-ROM drive can also be used to play audio CDs.
Entering destination
The destination can be entered with menu guidance on the radio and navigation unit (A2/56) and processed by
the navigation processor . The system only allows entry of destination addresses stored on the CD-ROM.
The following possibilities are available for entering a destination:
Call-up of destination stored in destination memory
Free entry of destination with menu guidance based on name (when destination is stored on CD-ROM)
Location finding

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:06 PMPage 142 © 2006 Mitchell Repair Information Company, LLC.

The navigation processor continuously calculates the location of the vehicle with the aid of the following
procedures:
GPS location finding
Basic location finding (dead reckoning)
Map-supported location finding (map matching)
The correct position is determined by continuously comparing the locating result of these three procedures.
Route calculation
The route is calculated in the navigation processor according to the destination entered, or automatically, after
deviating from the recommended route. The recommended route is stored in the navigation processor
Guidance
After the navigation processor has calculated the route, guidance is started. The driver receives continuous
information with the aid of guidance symbols appearing on the display of the radio and navigation unit
(A2/56) and voice announcements on the vehicle loudspeaker.
Audio 30 APS block diagramModel 163GF82.61-P-0002-02D
Model 168GF82.61-P-0002-02B
Model 170GF82.61-P-0002-02A
Models 208, 210GF82.61-P-0002-02C
Basic location finding (dead
reckoning), function GF82.61-P-3006D
Global positioning system (GPS)
location finding, function GF82.61-P-3007C
Map-assisted location finding,
function GF82.61-P-3008C
Route calculation, function GF82.61-P-3011E
Destination guidance, function GF82.61-P-3012D
Loading language, function GF82.61-P-3003B
Volume and tone settings GF82.60-P-2003A
Radio mode, function GF82.60-P-2001B
CD player mode, function GF82.60-P-2002B
Radio and navigation unit,
location/purpose/ design/function GF82.61-P-4109A
CTEL and GPS roof antenna,
location/purpose/ design/functionModels 163,
168,208.3,210GF82.70-P-4111A
Global positioning system antenna,
location/ purpose/design/functionModels 170, 208.4GF82.61-P-4106A
Antenna splitter, Model 163GF82.85-P-3107B

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:06 PMPage 143 © 2006 Mitchell Repair Information Company, LLC.

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 navi
gation 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
me
Saturday, October 02, 2010 3:30:06 PMPage 144 © 2006 Mitchell Repair Information Company, LLC.

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
me
Saturday, October 02, 2010 3:30:06 PMPage 145 © 2006 Mitchell Repair Information Company, LLC.

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
me
Saturday, October 02, 2010 3:30:06 PMPage 146 © 2006 Mitchell Repair Information Company, LLC.

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
me
Saturday, October 02, 2010 3:30:06 PMPage 147 © 2006 Mitchell Repair Information Company, LLC.