Mercedes-Benz ML320. Service manual — part 251

Fig. 85: MCS Cassette Mode Block Diagram

Playback of compact discs

When the" Open " button is pressed the display opens automatically releasing the slot for the c ompact 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 available for playback of the CC :



Auto reverse

2001 Mercedes-Benz ML320

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

me

By pressing the multifunction key" Side " the side of the CC can 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

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

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 diagram

Model 163

GF82.61-P-0002-02D

Model 168

GF82.61-P-0002-02B

Model 170

GF82.61-P-0002-02A

Models 208, 210

GF82.61-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/function

Models 163,
168,208.3,210

GF82.70-P-4111A

Global positioning system antenna,
location/ purpose/design/function

Models 170, 208.4

GF82.61-P-4106A

Antenna splitter,

Model 163

GF82.85-P-3107B

2001 Mercedes-Benz ML320

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

me