Mercedes-Benz ML320. Service manual - part 250

 

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Mercedes-Benz ML320. Service manual - part 250

 

 

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 

 

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 

 

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. 
Pressing to the right or left causes display of the next entries or previous 4 entries. 

 

2001 Mercedes-Benz ML320 

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

  

me 

 

 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 

 

 

 

 

 

 

 

 

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