navigation MERCEDES-BENZ ML430 1997 Complete Workshop Manual

Fig. 54: Display Layout Of Radio (A2) During Navigation - Shown On Model 203
When traveling within the digitized map area, the following information calculated by the navigation processor
is available to the user (partially to be called with "I" (INFO) button):
Route list indicating the distance to be driven on the affected streets or roads
Distance to destination and estimated time of arrival (the time must be set correctly for this purpose).
Driving recommendations
Arrow indicating the driving direction
Current location, in other words name of city and street, latitude and longitude
Name of the next road into which the vehicle should turn
Distance to next turning point specified in units of length or as bar graph (3)
The navigation processor generates graphic signals for the navigation system symbols.
Actual route guidance is supported by voice output via the vehicle loudspeakers.
GUIDANCE IN DIGITIZED MAP AREA, FUNCTION - GF82.61-P-4000GI
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
When driving within the digitized map area the following information is available to the user:
Current position and vehicle route on digital map (illustrated in figure)
Distance from destination and anticipated time of arrival
Destination guidance in
non-digitalized map area,
function GF82.61-P-4001C

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Driving direction recommendation
Distance to next turning point (specified in units of length)
The data is determined by the navigation processor and transmitted to the radio and navigation module
(A2/56) The current route guidance is primarily supported by the voice output (English).
The scale of the displayed map can be changed in increments. In addition it is possible to select whether the
map is aligned in the direction of motion Head-Up ) or toward the north North-Up ). The graphical signals for
map illustration is generated by the navigation processor.
DESTINATION GUIDANCE IN NON-DIGITALIZED MAP AREA, FUNCTION - GF82.61-P-4001C
MODEL 163, 168, 170, 203.0 /2 /7, 208, 209.3 /4, 210 with CODE (353) Audio 30 APS
When traveling outside of the digitized map area (e.g. company grounds, parking buildings, dirt roads,...),
however still within the DVD map boundaries, the navigation processor switches over to "navigation system in
non-digitized map area".
On the radio (A2) display the following message appears:
"OFF ROAD"
If the vehicle is also outside the DVD map limit, the following message appears:
"OFF MAP"
In both cases, only basic location finding is accomplished with correction using the GPS data.
A (limited) route guidance can be conducted only with specification of the:
Distance from the destination as the crow flies
Direction to the destination (as an arrow)
After reentering the digitized map area, the system automatically continues with "navigation system in digitized
map area". The possible streets/roads on which the vehicle may be located are determined with the aid of GPS
location finding. During this process a slight delay in the route guidance may result.
The road data of several Central European countries are stored on the navigation DVD, so that the "OFF
MAP" message will not appear, if borders between the stored countries are crossed. No special foreign country
DVD has to be inserted.
Voice output, function GF82.85-P-3001GI
Guidance in non-digitized
map area, function GF82.61-P-4001GI

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GUIDANCE IN NON-DIGITIZED MAP AREA, FUNCTION - GF82.61-P-4001GI
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
When traveling outside of the digitized map area (e.g. company grounds, parking buildings, dirt roads,...),
however still within the CD-ROM map boundaries, the navigation processor switches over to " Guidance in
non-digitized map area " .
The following message appears on the display of the radio and navigation module (A2/56) :
"OFF ROAD "
In this case only basic location finding (dead reckoning) with correction by the GPS data is performed (no map
matching )
After reentering the digitized map area, the system automatically continues with " Guidance in digitized map
area ".
With the aid of the GPS position the possible roads, on which the vehicle could be located, are determined.
However, this can result in temporary delays in the guidance function.
DYNAMIC ROUTE GUIDANCE, FUNCTION - GF82.61-P-4003GI
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
Dynamic route guidance,
function GF82.61-P-4003QA
Basic location finding,
function GF82.61-P-3006GI
Global positioning
system location finding,
function GF82.61-P-3007GI
Guidance in digitized
map area, function GF82.61-P-4000GI

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Fig. 55: Identifying Dynamic Route Guidance Function
Starguide was developed on the basis of dynamic route guidancein Europe. In order to comply with the more
comprehensive USA requirements this system also contains an additional Information Service specially
adapted to specific user requirements.
Dynamic route guidance
The desired requirements are transmitted to the S ervice O perating C enter (SOC ). The Service O perating C
enter (SOC ) transmits the individual and relevant traffic situations to the vehicle in the greater metropolitan
area of Los Angeles.
The current route guidance and the calculation of the dynamic route guidance is accomplished by the navigation
processor in the radio and navigation module (A2/56)
Moreover, traffic jams and construction sites are indicated on the radio and navigation module (A2/56)
display in form of icons .
•
•
The dynamic route guidance service will be tested in the Los Angeles area beginning in the summer of 2001.

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DYNAMIC ROUTE GUIDANCE, FUNCTION - GF82.61-P-4003QA
MODEL 163, 168, 170, 203.0 /2 /7, 208, 209.3 /4, 210 with CODE (353) Audio 30 APS
The current traffic situation is taken into consideration in the dynamic route guidance. The COMAND
navigation system Audio 30 APS can receive information on the traffic situation either by the Traffic Center
Service (TCS) or the Traffic Message Channel (TMC).
The services from the Traffic Center Service (TCS) are offered by an external provider and an application is
to be sent to the provider for use.
Traffic messages via Traffic Center Service (TCS)
The latest traffic situation information is transmitted by a service provider for a fee in the form of an SMS (short
message service) signal via the CTEL D network. The traffic data are only transmitted when the service
provider receives a corresponding request from the vehicle.
The request can be sent either:
Cyclically, every 15 minutes
Once
In order to reduce the data volume the current location of the vehicle is automatically sent to the D network
center when the information request is posted.
The service provider then transmits only traffic messages at within a radius of approx. 75 km of the vehicle. The
telephone system of the vehicle receives the traffic announcements and transmits them via the D2B to the traffic
data recorder that is integrated in the radio (A2).
It is possible to use the telephone during TCS data interchange.
Traffic messages via Traffic Message Channel (TMC)
Information on the current traffic situation is transmitted by a specially equipped radio-broadcast station aimed
at specific areas and coded (toll) or uncoded (toll free) via VHF. For this purpose an appropriate FM/ RDS
station must be tuned in.
The radio (A2) receives the traffic announcements and transmits them to the traffic data recorder. Since no
communication is accomplished between the vehicle and broadcasting corporation with TMC messages, the
traffic data recorder selects the traffic messa
ges related to the route on which the vehicle is presently driving as
Starguide, function GF82.85-P-2014GI
Information service,
function GF82.85-P-3016GI
Data transmission for
Starguide, function GF82.85-P-3017GI

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well as the surrounding area.
Traffic information analysis
In both cases (TCS or TMC) the traffic data recorder decodes the traffic information and forwards it when
requested to the navigation computer. The navigation processor makes the decision whether the route should be
changed. If necessary, a message that the route should be changed is output via the vehicle speaker.
For synchronization purposes the traffic data recorder needs a list from the navigation processor, in which each
stretch and each striking feature (e.g., freeway exit) of the recorded street network is clearly defined with the aid
of a number. The list is originally stored on DVD. If required (e.g. changing the DVD) it is automatically
loaded into the traffic data recorder. The traffic information stored in the traffic data recorder is erased
automatically after 0.5 hrs., max. 100 messages can be stored.
The decoded traffic messages are marked on the map using suitable symbols. They can also be displayed as
clear text. To this end the "alternate route" button should be pressed and the "TRAFFIC INFO" menu activated.
RADIO AND NAVIGATION UNIT, LOCATION - GF82.61-P-4109-01A
Models 163, 168, 170,208, 210 with code 353
Radio/navigation unit
location/task/design/ functionModels 163, 168,
170, 208, 210GF82.61-P-4109A
Model 209GF82.61-P-4109QA
Radio, location/task/design/functionModel 203GF82.60-P-4109P
Transmitter/receiver unit,
location/task/design/ functionModel 203, 210
with code (853) MB
standard telephone
with code (855)
TELE AID
with code (930) taxi
emergency call
Model 209
with code (853) MB
standard telephone
with code (855)
TELE AIDGF82.95-P-4300A
Telephone interface,
location/task/design/ functionModel 203, 209GF82.70-P-3107Q

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Fig. 56: Identifying Radio And Navigation Unit - Illustrated On Model 168
RADIO AND NAVIGATION MODULE , LOCATION - GF82.61-P-4109-01GI
Fig. 57: Identifying Radio And Navigation Module - Radio And Navigation Module
RADIO/NAVIGATION MODULE , DESIGN - GF82.61-P-4109-03A
Models 163, 168, 170, 208, 209, 210 with code 353
The Audio 30 APS operating unit is a co mplete radio and navigation system.
It has:
Radio/receiver with 2-tuner technology
a signal input for audio mute
Digital Data Bus interface (D2B)
Display
4-channel amplifier with 4 speaker outputs
CD ROM-disk drive for audio and navigation data CDs
a navigation processor with integrated GPS receiver and gyro sensor
Output of intermediate frequency signal (Z F) for the FM antenna diversity function
Interface of interior CAN (CAN-B) and D2B (Digital Data Bus)

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RADIO AND NAVIGATION MODULE, DESIGN - GF82.61-P-4109-03GI
The following is integrated into the radio and navigation module (A2/56) (maximum scope):
Graphic compatible 5" LCD color display
Navigation processor with GPS receiver and gyrosensor
Single CD drive for playing audio CD's (option)
Navigation CD drive for loading navigation data or for playing audio CD's (optional)
Telephone unit (optional)
Radio tuner
Audio amplifier
CC player
The radio and navigation module (A2/56) has the following digital interfaces:
Digital data bus (D2B)
K-cable (diagnosis interface)
Fig. 58: Identifying Radio And Navigation Module (A2/56) Design

RADIO AND NAVIGATION MODULE, FUNCTION - GF82.61-P-4109-04A
Models 163, 168, 170, 208, 209, 210 with code 353
Processing key signals
The controls on the radio (A2) are read in via I/O ports of the microcontroller and made available to the central
computer. Depending on the system function the button operations are processed further in the central computer
or conveyed via the Digital Data Bus (D2B) or interior CAN (CAN B) in the form of a data telegram to the
system components involved (e.g. CD changer).
Display

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The display of the radios (A2) has 197 x 32 pixels. Texts are displayed in 3 lines.
After particular functions are called (e.g. navigation), the bottom line shows a variable inscription for the row of
buttons underneath (multifunction buttons). As a result the system can be operated very conveniently with a few
buttons, as the function which is activated when the button is operated, is shown in plain text (e.g. LANG,
ITEM, DYN, CLOCK etc.).
Audio signal output
The audio signals of the various sources (CD, voice output for navigation etc.) are processed by the radio (A2)
and amplified before output by the vehicle speakers.
On models 168, 170, 208 and 210 with the sound system (code 810) the audio signals are finally amplified
by the amplifier for the sound system (N40/3). For this, the audio source data (low-frequency signals) are
transmitted to the amplifier for the sound system (N40/3) via separate lines.
On models 163 and 209 the final amplification of the audio signal is performed by the sound amplifier
(A2/13). All the data are transmitted via the D2B.
Audio mute
An incoming phone call activates the audio mute function (a separate signal input exists on the radio (A2) for
this). When the audio mute function is activated, the current audio source (e.g. radio) is muted automatically.
Navigation processor, GPS control module and gyrosensor
The navigation processor is the central component of the navigation system.
It is integrated into the radio (A2) and from the incoming signals continuously calculates the location and once
the destination is entered calculates the route for navigation. The GPS receiver is integrated into the navigation
processor. It evaluates the satellite signals and calculates from them the vehicle position in degrees longitude
and latitude. Various GPS antennae are used to receive these signals depending on the vehicle model:
Model 163: telephone and GPS roof antenna (A2/49)
Models 168, 208.3, 210: GPS antenna (A2/49a2)
Models 170, 208.4: GPS rear antenna (A2/23a2)
Model 209: GPS antenna (A2/23)
Reception from at least 3 satellites is necessary for exact GPS position calculation. A free view of the sky is
required for this purpose.
The integrated gyrosensor continuously senses every change in direction of the vehicle. Evaluation of this data
is accomplished by the navigation processor.
Calibration of the gyrosensor is not required.

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DVD drive and DVD
The DVD drive of the radio (A2) reads data from the navigation DVD inserted and makes this available to the
navigation processor via the data bus inside the device.
Audio CDs can also be played.
The following are located on the navigation DVD:
Program data for the navigation computer
Voice segments for voice output
Map data.
A distinction is made between digitized and non-digitized areas within the DVD map area:
Villages, towns, roads, intersections and their attributes (e.g. one-way streets, no turns etc.) are recorded
in the digitized map area.
Included in the non-digitized areas are, for example company/private grounds, farms, small housing
estates, tracks across fields and areas between villages.
No data is available here.
Diagnosis interface (K-line) and fault management of D2B-components
During operation, the system stores all occurring faults in the nonvolatile memory. It is not possible to output
the fault via the display of the radio (A2).
The radio's (A2) fault management also includes the D2B-components connected. For this purpose, each D2B
component has its own DTC memory. The faults are transmitted from the corresponding components via the
D2B to the radio (A2) and can then be read out via the diagnosis interface
RADIO AND NAVIGATION MODULE, FUNCTION - GF82.61-P-4109-04GI
Processing button actuations
The control buttons and switches on the function keypad on the radio and navigation module (A2/56)are read
in via the I/O ports of the microcontroller and transferred to the central processor. Depending on the system
function the button actuations are processed in the central processor or relayed to the other system components
via the digital data bus ( D2B ) in form of a data telegram.
Graphic preparation and image output
The graphics subsystem handles the preparation and output of the operating displays. The operating displays are
output internally to the display by the graphic subsystem via the RGB output ( R =red, G =green, B =blue).
The RGB signal contains information and amplitudes of the three basic colors Red, G reen and Blue as well

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