MERCEDES-BENZ ML430 1997 Complete Repair Manual

When the rotary knob is actuated in the switched-on state the radio and navigation module (A2/56)can be
switched off.
Switch-off characteristics when voltage is too low
The central processor in the radio and navigation module (A2/56) permanently monitors the battery voltage.
Depending on the voltage value the system will act as follows:
The battery voltage less than 9.5 volts
If the battery voltage drops below 9.5 volts the radio and navigation module (A2/56) switches off
automatically.
If the system switches off and the voltage increases to greater than 9.5 volt the radio and navigation module
(A2/56) does not switch back on automatically.
If the system switches off it can be switched back on manually .
TELEPHONE MODE, FUNCTION - GF82.85-P-2007GI
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
Radio mode, function GF82.60-P-2001GI
CD-player mode,
function GF82.60-P-2002GI
Telephone mode,
function GF82.85-P-2007GI
Cassette mode, function GF82.85-P-2010GI
Navigation mode,
function GF82.85-P-2012GI

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1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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Fig. 84: MCS Telephone System Block Diagram
The telephone system can be operated as follows:
directly on the radio and navigation module (A2/56) or
with the portable cellular telephone (A34/6) or
with the telephone handset (A34)
Making a call, function
The data telegrams (e.g. button actuation) for controlling the telephone system are relayed to the telephone
transmitter/receiver (A35) from the radio and navigation module (A2/56) via the digital data bus ( D2B )
The actual telephone connection is completed by the CTEL/GPS antenna splitter (A2/57) and the CTEL and
GPS roof antenna (A2/49)
The audio source is automatically muted during a telephone call.
After switching over to the telephone mode the following display appears:
Strength of received signal (illustrated with 5 beams )
Message indicating readiness for telephone mode with "Ready" display.

2001 Mercedes-Benz ML320
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Multifunction keys "NUM " and "NAME ".
Entering code
The telephone can be protected against undesired use by entering a three - digit code. All telephone
functions are disabled except the emergency call function.
The telephone can be enabled again by entering the three - digit code (correction possible with " Clear" button
in the event of incorrect entry) and actuation of the multifunction key" OK ".
The following functions are available in the telephone mode:
Emergency call function
This function offers the possibility of transmitting an emergency call within the reception range of the
radio telephone network. The emergency call number is stored in the memory location 1 and can be
called even when the telephone is disabled. The emergency call is performed by pressing and holding
control button 1 down longer than 1 second " EMERGENCY " appears on the display. An emergency
call can be terminated by pressing " the "END " button.
Manual entry of telephone number
Telephone numbers can be entered manually on the number pad.
An incorrectly entered number can be deleted by momentarily pressing the " CLEAR " button. If the" CLEAR
" button is pressed for longer than 2 s all telephone numbers deleted
If the number entered consists of only 1 or 2 numbers, the telephone number stored in the memory with this
code is dialed.
The entered telephone number can be transmitted to the telephone by pressing the " SEND " button. The
telephone compares the transmitted telephone number with the telephone number stored in the memory. If the
numbers coincide the associated name, the memory location number and the telephone appear on the display
(depending on setting).
If the numbers do not coincide, the telephone number entered is still displayed.
Then the connection can be completed. The duration of the telephone call is indicated in minutes and seconds.
The call can be terminated by pressing the " END " button.
Selecting stored telephone number
The memory can be called up by pressing the multifunction key" NAME " or "NUM "."NAME "
indicates the stored names on the display" NUM " indicates the memory location number as well as the
associated telephone number. By pressing the" joystick " up or down the stored entries are displayed.
Pressin
g to the right or left causes display of the next 4entries or previous 4 entries.

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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If a name is not available for the stored telephone number, the display is switched over and the
memory location and the telephone number are displayed.
By manually entering 1 or 2 numbers and subsequent actuation of the multifunction key" NAME " or
"NUM " the name stored under this memory location number or the stored telephone number are
indicated.
Pressing " SEND " button completes the desired connection. If no connection is to be completed, the
memory area can be exited by pressing the multifunction key" EXIT ".
Quick dial
When a one or two-digit number is entered and the " SEND " button is actuated the telephone number
stored under this memory location number is dialed.
By pressing and holding one of the number buttons 1 to 9 for more than 2 s the telephone number stored
under this memory location number is dialed. In this case it is not necessary to actuate the " SEND "
button.
Memory location functions 1 number is reserved for emergency !
Redialing
Pressing the" SEND " button without previously entering a telephone number calls up the last 5 selected
telephone numbers on the display. It is possible to select the desired telephone number by pressing the"
joystick " up or down. The connection is completed by actuating the" SEND " button. This area can be
exited by pressing the multifunction key" EXIT ".
Incoming calls
During an incoming call all other audio sources are set to mute and "CALL " appears on the display. The
call can be accepted by pressing the " SEND " button or terminated by pressing the" END " button.
During a call it is possible to continue dialing, e.g. enter a code number for an answering machine.
CASSETTE MODE, FUNCTION - GF82.85-P-2010GI
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
GPS roof
antenna/telephone,
location/purpose/
design/function GF82.70-P-
4111A

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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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
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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

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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

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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

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

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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

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