MERCEDES-BENZ ML430 1997 Complete Repair Manual

Title forward/backward
If the "joystick " is pressed to right the next CD title is skipped. Pressing to left within the first 10 s of
playback causes jumping to the previous title, otherwise to the beginning of the title presently being
played. If the" joystick " is held to left or right the changer jumps from one title to the next within short
time intervals without playing them.
Fast forward/rewind (music search)
If the "joystick " is pressed up or down the titles are played quickly. This allows specific parts of a title to
be played or skipped. When the start or end of the CD is reached the search is interrupted.
Title repetition and random playback
Random playback can be activated/deactivated with the multifunction " RDM " key. When activated this
function is indicated on the display and random playback can then be selected. The random playback
feature affects only the CD presently being played back. Title repetition can be activated/ deactivated
with the multifunction " RPT key. The title presently selected is repeated until the function is deactivated.
The random playback and title repetition remain active, even when the radio and navigation module
(A2/56) is switched off and switched back on again. Actuating these two functions simultaneously is not
possible.
Pause
The multifunction key" II "(Pause ) interrupts the title presently being played. Pressing again continues
playback.
Direct title selection
Pressing the " *" button followed by entry of the desired title via the number block allows direct selection
of the title.
Multifunction key Time
By pressing the multifunction key" Time " it is possible to change between 2 different display modes:
Display of title number and previous playback time of title (standard setting)
Number of titles and entire playback time of CD ("Time appears on display).
CD title assignment, function
Each CD has a permanently stored, so-called T able of C ontents (TOC ) entry. The radio and navigation
module (A2/56) recognizes the CD clearly on the basis of this entry and can automatically designate it (even
when the CD is then inserted into another CD ma
gazine) after the title has been assigned once by the user.

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Moreover, the TOC entry includes information about the number of titles on a CD and the entire playing time
of the CD .
VOLUME/TONE ADJUSTMENTS, FUNCTION - GF82.60-P-2003B
MODEL 163, 168, 170, 203.0 /2 /7, 208, 209.3 /4, 210 with CODE (353) Audio 30 APS
Basic features
The balance and fader settings apply for all signal sources (radio, CD, voice output).
The base and treble settings can be stored separately for the following signal sources:
Radio
Traffic announcements
Navigation voice output
Integrated CD player
Optional CD changer
Volume and tone settings for traffic announcements
The volume for traffic announcements can be changed during a traffic announcement (procedure analog to
adjusting navigation system voice output).
Volume and tone settings for navigation system voice output
The volume is automatically increased by a defined level during voice output. The volume level increase can be
set in stages directly at the radio (A2). The radio is preset to 6 dB.
During voice output, the volume can be changed with the left knob. The base/treble settings can be changed
with the right knob after pressing the "tone" button (during voice output). The settings can be continued after
conclusion of the voice output; the setting mode is terminated 8s after actuating the last button.
VOLUME/TONE ADJUSTMENTS, FUNCTION - GF82.60-P-2003GI
MODEL 163 as of 1.9.01 with CODE (522) Modular control system (MCS) radio USA with CODE (357)
Volume/tone adjustments,
function GF82.60-P-2003GI
Radio/navigation module,
location/purpose/
design/function GF82.61-P-4109GI
Switch on/off behavior,
function GF82.85-P-2006B

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Navigation system - additional unit with CODE (818b) Single CD player - additional unit with CODE
(491) U.S. version
It is necessary to distinguish between audio and service sources on the radio and navigation module (A2/56) :
Audio sources are:
Radio
CD player
CC player
CD changer (code 819a)
Service sources include:
Voice output on navigation
telephone
Signal editing required for volume and tone settings is accomplished by the audio component integrated into
the radio and navigation module (A2/56)
If the vehicle is additionally equipped with a sound system (code 810), the sound amplifier (A2/13) ensures
final audio signal amplification.
Volume setting
By turning the volume knob the volume of the corresponding mode changes.
Tone setting
The tone settings as well as the general brightness adjustment of the display can be reached by pressing
the multifunction key" ADJ ". If the multifunction key" ADJ " is pressed for longer than 2 s all tone
settings of all modes jump back to the center position. This is confirmed by a short peep tone. The
adjustment possibilities for treble/bass, balance and fader are summarized in one display.
They can be selected by actuating the multifunction keys " " and " ". The corresponding setting can be
changed by actuating the multifunction keys"- " and "+ " or "L ", "R ", "F " and "R ".
These settings can also be made with the "joystick " in an analogous manner. When the headlamps are
switched on the brightness setting of the display can be reached by pressing the multifunction key" BRT" in the
tone setting menu. Here it is possible to select between " bright " and "dark ". Simultaneously pressing the
multifunction keys " - " and "+ " or "L " and "R " or "F " and "R " resets the corresponding setting in the
current mode to the center position
Tone setting is not possible in the telephone or navigation mode. The tone or brightness setting can be exited
by pressing the multifunction key EXIT ".
Voice output, function GF82.85-P-3001GI

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AUDIO 30 APS, LOCATION OF COMPONENTS - GF82.61-P-0002-01D
Fig. 39: Identifying Audio 30 APS Components Location
The FM/AM antennas are located in the rear window .
AUDIO 30 APS BLOCK DIAGRAM - GF82.61-P-0002-02D
Model 163 with code 353
Radio and navigation
module, location/purpose/
design/function GF82.61-P-4109GI

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Fig. 40: Identifying Audio 30 APS Block Diagram
AUDIO 30 APS OPERATING INST RUCTIONS - GF82.61-P-0002-03A
Models 163, 168, 170, 208, 210 with code 353
Controls on radio and navigation unit (A2/56) with explanations of primary functions.
Fig. 41: Identifying Radio A nd Navigation Unit Controls

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Activating anti-theft alarm
During initial operation of the radio and navigation unit (A2/56) it is necessary to activate the anti-theft
alarm with the aid of the hand-held tester.
After activation has been accomplished, deactivation is no longer possible.
Only after activation is it necessary to enter a 5-digit code after interruption of the power supply. When entering
the code observe:
After the code has been entered incorrectly three times the message "Wait" appears. The radio and
navigation unit (A2/56) is then disabled for ten minutes. ?
Following the next three incorrect entries operation is not possible for ten minutes again. ?
Then after an additional 3 incorrect entries the unit is disabled for 1 hour in each case.
The waiting time expires only with the radio and navigation unit (A2/56) switched on.
Inserting and ejecting CD
CDs can be inserted and ejected (audio or navigation CD) in all operating states. After pressing the "eject
button" a CD already inserted is ejected by a motor. If the CD is not removed within approx. 14 seconds, it is
pulled back in automatically.
After inserting a CD it is necessary to push it a slight distance into the CD opening; it is then pulled in the rest
of the way automatically.
When a navigation CD is inserted the menu for entering destination is activated automatically. However,
this applies only when the system has previously requested that the navigation CD be inserted.
The eject button for the CD drive also functions when the radio and navigation unit (A2/56)is in the "code
wait state". This means that a CD can be removed in spite of the request to enter the anti-theft code.
Glossary
AbbreviationMeaningExplanation
AMA mplitude M odulationThe amplitude of the carrier
frequency is modulated with the
signal (e.g. LW, MW and SW
radio)
CDC ompact D iscStorage medium for all types of
data (music, programs,).
D2BD igital D ata B usOptical bus system for transfer of
data via fiber optic cable.
FMF requency M odulationThe signal is transmitted by
changing the frequency of the
carrier (e.g. FM radio)

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GPSG lobal P ositioning S ystemSystem for position finding with
the aid of satellites
GSMG lobal S ystem for M obile or
also G lobal S tandard of M obile
communicationInternational standard for mobile
telecommunication.
LWL ong W aveCertain relatively low frequency
range within which radio signals
are transmitted (compare UHF and
MW).
MWM edium W aveCertain frequency range within
which radio signals are transmitted
(compare UHF and LW).
POIP oints of I nterestLocations of geographic or tourist
interest.
PTYP rogram Ty peRDS feature describing the
program contents of the radio
station (pop, culture, classics,)
RDSR adio D ata S ystemStandard for transmission of
information via FM radio station
(station name, e.g. SWR3 or
program type (see PTY),)
TCST raffic C enter S erviceStandard for transmission of
traffic information via cellular
telephone network. Presently not
used by Audio 30 APS (status:
3/99)
TMCT raffic M essage C hannelStandard for FM / RDS
transmission of traffic
information. Presently not used by
Audio 30 APS (status: 3/99)
TPTraffic ProgramRDS feature. Indicates that the
station tuned in is a traffic station.
UKWUltra-high frequencyCertain frequency range within
which radio signals are transmitted
(relatively high frequency,
compare LW and MW).
ZEDestination entryEntry of town and street name for
desired trip destination.
ZFGuidanceFunction of navigation system.
Other terms:
Intermediate frequencyThe IF signal is required for the
antenna diversity function. With
this function the antenna with the
best reception is automatically
selected on vehicles with a system
of FM antennas. This function is

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AUDIO 30 APS, FUNCTION - GF82.61-P-0002A
MODEL 163,168,170, 208, 210 with CODE (353) Audio 30 APS
Fig. 42: Identifying Radio And Navigation Unit

The Audio 30 APS has the following functions:
Radio
Performance corresponds to an MB radio in the superior class (3/99)
Navigation system
Performance and function are comparable with the current auto-pilot system (APS) (status 3/99)
Combined CD player for audio and navigation
Audio signal processing and amplification with control of optional units, e.g.:
Amplifier for sound system (N40/3) and CD changer (A2/6)
Digital data bus (D2B) and CAN data bus interface
The system is distinguished by its high degree of integration resulting in optimum compactness. The following
components are integrated into the radio and navigation unit (A2/56) :
CD-ROM drive for navigation and playing audio CD's
Navigation processor including global positioning system (GPS) receiver and gyrosensor
Radio with two-tuner technology
not used presently. (Status: 3/99)

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4-channel power amplifier for vehicle loudspeakers
System interlinkage
The radio and navigation unit (A2/56) is provided with the following components for data exchange with
external digital components:
CAN (A1 -A2/56)
The radio and navigation unit (A2/56) is connected with the instrument cluster (A1) via a separate
CAN bus. The difference to the other CAN systems is indicated by the spelling CAN bus (A1-A2/56).
The CAN bus (A1-A2/56) allows the following functions:
Operation of the radio and navigation unit (A2/56)is also possible with the multifunction steering
wheel.
The multifunction display (A1/p13) in the instrument cluster (A1) can display navigation
information on the current operating status of the radio and navigation unit (A2/56) .
The connection to the CAN bus (A1-A2/56) is only realized on models 208 and 210. (Status 3/99)
Digital data bus (D2B)
Data can be exchanged between the external audio components, the telephone system and - if present -
the voice control system over the D2B bus. This allows control data as well as the actual audio signals
(e.g. music from CD changer) to be transferred.
The only additional D2B component presently possible is the CD changer (A2/6) (Status: 3/99)
K bus (diagnostic interface)
Data exchange is accomplished between the diagnostic interface and the hand-held tester (reading out
DTCs and actual values, ...).
The communication between the HHT and all other D2B components is accomplished over the radio
and navigation unit (A2/56) diagnostic interface.
Audio 30 APS, location of
componentsModel 163GF82.61-P-0002-01D
Model 168GF82.61-P-0002-01B
Model 170GF82.61-P-0002-01A
Model 208, model 210&.2.(GF82.61-P-0002-
01C)
Audio 30 APS block
diagramModel 163GF82.61-P-0002-02D
Model 168GF82.61-P-0002-02B

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TABLE OF CONTENTS, FUNCTION DESCRIPTION OF AUDIO 30 APS - GF82.61-P-0998ZZ
MODEL 163, 168, 170, 203.0 /2 /7, 208, 209.3 /4, 210 with CODE (353) Audio 30 APS
Model 170GF82.61-P-0002-02A
Models 208, 210&.2. (GF82.61-P-0002-
02C)
Audio 30 APS operating
instructions GF82.61-P-0002-03A
On/Off behavior, function GF82.85-P-2006B
Navigation mode, function GF82.85-P-2012B
Radio mode, function GF82.60-P-2001B
CD player mode, function GF82.60-P-2002B
Volume and tone settings,
function GF82.60-P-2003B
Digital data bus (D2B),
function GF82.00-P-0001A
Radio and navigation unit,
location/purpose/
design/function GF82.61-P-4109A
Audio 30 APS, functionModels 163, 168,
170, 208, 210GF82.61-P-0002A
Model 203, 209.3/4GF82.61-P-0002E
Audio 30 APS location of the
componentsModel Series 163GF82.61-P-0002-
01D
Model 168GF82.61-P-0002-
01B
Model 170GF82.61-P-0002-
01A
Models 203, 209.3GF82.61-P-0002-
01E
Model 209.4GF82.61-P-0002-
01F
Models 208, 210GF82.61-P-0002-
01C
Audio 30 APS block diagramModel Series 163GF82.61-P-0002-
02D
Model 168GF82.61-P-0002-
02B
Model 170GF82.61-P-0002-
02A
Models 203, 209GF82.61-P-0002-
02E

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