1997 MERCEDES-BENZ ML430 phone

MODELS 163, 208.3, 210, 220 with CODE (352a) COMAND operating and display system with CODE
(353) Audio 30 APS with CODE (853) MB standard CTEL telephone with CODE (854) MB portable
CTEL telephone with CODE (855) TELE AID
MODEL 163 with CODE (522) Modular control system (MCS) Radio USA
Location shown on model 210
Fig. 81: Identifying Telephone And GPS Roof Antenna

The telephone antenna (A2/49a1) and the GPS antenna (A2/49a2) are integrated in an antenna housing.
GPS/telephone roof
antenna, locationModels 129, 140, 168,
202, 208.3, 210GF82.70-P-4111-01A
Model 220GF82.70-P-4111-01B
Model 163GF82.70-P-4111-01GH
GPS/telephone roof
antenna, purposeReceiving and amplifying
the global positioning
system (GPS) satellite
signals as well as
transmitting and receiving
the mobile radio signals
(GSM 900 MHz).
GPS/telephone roof
antenna, designThe GPS/telephone roof
antenna (A2/49) consists

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:06 PMPage 129 © 2006 Mitchell Repair Information Company, LLC.

MODULAR CONTROL SYSTEM (MCS), FUNCTION - GF82.85-P-0011GI
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
(819) 6-disk CD changer in trunk with CODE (491) U.S. version
The following systems can be operated centrally with the aid of the radio and navigation unit (A2/56) :
Cassette deck
Radio
Single CD player and CD player with changer (optional)
Sound system (optional)
Navigation (optional)
Telephone (optional)
Fig. 82: Identifying Radio And Navigation Unit
of two components:
CTEL antenna
(A2/49a1)
GPS antenna
(A2/49a2)
Model 163 as of 01.09.01GF82.70-P-4111-03GH
GPS/CTEL roof antenna,
functionCode 351 or code 353,
except models
129 /163 /220GF82.70-P-4111-04A
Code 353 for model 163GF82.70-P-4111-04D
Code 347 or 348 or 352
except models 168/163GF82.70-P-4111-04B
Model 163 as of 01.09.01GF82.70-P-4111-04GH

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:06 PMPage 130 © 2006 Mitchell Repair Information Company, LLC.

The digital components of the radio and navigation unit (A2/56)are interlinked via the digital data bus
( D2B ). Control data, audio signals and other information are transmitted between the various system
components via the digital data bus ( D2B ) Since some of the individual components operate with various data
formats or place different requirements on the transmission speed and transmission security, various bus
systems are installed.
MODULAR CONTROL SYSTEM (MCS) FUNCTION DESCRIPTION CONTENTS - GF82.85-P-0995GIZ
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
(819) 6-disk CD changer with CODE (491) U.S. version
Switch on/off behavior,
function GF82.85-P-2006GI
Radio operation, 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
Volume/tone adjustments,
function GF82.60-P-2003GI
Radio/navigation unit
location/task/design/ function GF82.61-P-4109GI
Modular control system (MCS),
function* for USA onlyGF82.85-P-0011GI
Switch on/off behavior,
function GF82.85-P-2006GI
Radio operation, function GF82.60-P-2001GI
CD-player mode, function GF82.60-P-2002GI
Telephone mode, function GF82.85-P-2007GI
Starguide, function GF82.85-P-2014GI
Information service, function GF82.85-P-3016GI
Data transmission for
Starguide, function GF82.85-P-3017GI
Cassette mode, function GF82.85-P-2010GI
Navigation mode, function GF82.85-P-2012GI
Voice output, function GF82.85-P-3001GI
Volume/tone adjustments,
function GF82.60-P-2003GI
Constant map matching,
function GF82.61-P-2002GI
Basic location finding, function GF82.61-P-3006GI

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:06 PMPage 132 © 2006 Mitchell Repair Information Company, LLC.

The data on the current navigation are stored for 12 hours after the radio (A2) is switched off.
SWITCH-ON/OFF CHARACTERISTICS, FUNCTION - GF82.85-P-2006GI
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
Switch-on characteristics
Activation of entire system
When the ignition/starter switch is turned to position 1(c.15R, ON ) the display is switched on , if the radio
and navigation module (A2/56) has been switched on before the ignition key was removed the last time.
The radio and navigation module (A2/56) is now ready for operation. The system active before the last
switch-off (e.g. radio) is switched on and the corresponding basic menu displayed. If the radio and navigation
module (A2/56) has been switched off for longer than 60 min a warning display appears with general
specifications for using the system.
When a telephone call is received the radio and navigation module (A2/56) switches on automatically.
Behavior when rotary knob is pressed
The radio and navigation module (A2/56) can also be switched on the when the remote control ke
y (A8/1) is
removed by actuating the rotary knob.
All functions are then available for 60 min . After expiration of 60 min the radio and navigation module
(A2/56) switches off automatically.
This function can only be repeated by actuating the rotary knob again.
Switch-off characteristics
The radio and navigation module (A2/56) can be switched off by turning the ignition key to position 0 c. 15C,
OFF ).
Radio operation, function GF82.60-P-2001B
CD-player mode,
function GF82.60-P-2002B
Telephone mode,
functionModel 209GF82.85-P-2007QA
Navigation mode,
functionModel 163, 168,
170,208,210GF82.85-P-2012B
Model 203, 209GF82.85-P-2012EE

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:06 PMPage 135 © 2006 Mitchell Repair Information Company, LLC.

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

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:06 PMPage 136 © 2006 Mitchell Repair Information Company, LLC.

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
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:06 PMPage 137 © 2006 Mitchell Repair Information Company, LLC.

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
me
Saturday, October 02, 2010 3:30:06 PMPage 138 © 2006 Mitchell Repair Information Company, LLC.

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
me
Saturday, October 02, 2010 3:30:06 PMPage 139 © 2006 Mitchell Repair Information Company, LLC.