1997 MERCEDES-BENZ ML430 Start error

256 Practical hintsWhat to do if …Additional indicators in the speedome-ter displayDisplay
Possible cause
Suggested solution
9
Perform minor service (A) (
page 232).

Visit an authorized Mercedes-Benz
Light Truck Center to perform service.
´
Perform major service (B) (
page 232).

Visit an authorized Mercedes-Benz
Light Truck Center to perform service.
Á
î
The
StArt
message comes on in
addition to the
Error
message.
The immobilizer is not operational.

Contact an authorized
Mercedes-Benz Light Truck Center or
call 1-800-FOR-MERCedes (in the
USA), or 1-800-387-0100 (in Cana-
da).

323 Index
Display messages
Error 256
Service indicator (FSS) 256
StArt 256
Displays
Messages 219
Service indicator 232
Distance remaining 189
Door entry lamps 113
Door unlock
With Tele Aid* 179
Doors
Opening from inside vehicle 90
Opening from outside 89
Downhill driving
Cruise control 151
Downshifting 120
Drink holder see Cup holder 167
Drinking and driving 193Driving 42, 47
Abroad 211
In winter 198
Problems 51
Safety systems 76
Through standing water 200
Driving abroad 211
Driving instructions
Towing a trailer 209
Driving off 195
Driving safety systems
4-ETS 79
ABS 76
BAS 78
ESP 80
Driving systems 150
Cruise control 150
Driving safety systems 76
EBP 80
Parktronic* 153
Driving through water 203E
Easy entry/exit feature* 101
EBP 80
Indicator lamp 245
Economy mode
Automatic climate control 135
Electrical connections
Trailer 207
Electrical fuses 287
Electrical outlet 170
Electrical system
Technical data 297
Electrically folding exterior rear view
mirrors 128
Electronic Brake Proportioning see EBP
Electronic Stability Program see ESP 25,
80
Electronic stability program see ESP 312
Electronic Traction System see 4-ETS 25
Emergency call system
Requirements 172
Emergency call system* 172

324 IndexEmergency calls
Initiating an emergency call 175
With Tele Aid* 173
Emergency operation (Limp Home
Mode) 124
Emergency operations
Closing sliding/pop-up roof* 265
Locking the vehicle 262
Opening sliding/pop-up roof* 265
Remote door unlock 179
Unlocking the vehicle 261
Emergency tensioning device see
ETD 67, 312
Emission control 212
Emission control label 292
Engine
Starting 46
Technical data 294
Turning off 54
Engine cleaning 236Engine compartment
Fuse box in 287
Hood 217
Engine malfunction indicator lamp 25,
248
Engine number 311
Engine oil 218, 302
Adding 221
Additives 302
Checking level 218
Consumption 218
Messages in display 219
Oil dipstick 221
Viscosity 312
Enlarged cargo area 99
Error
Display messages 256ESP 25, 80, 312
LOW RANGE mode 81
Malfunction indicator lamp 245, 246,
247
Switching off 81
Switching on 82
Synchronizing 246
Warning lamp 245, 246, 247, 251
ETD 312
Safety guidelines 62
ETD (Emergency tensioning device) 67
Exterior mirrors
Folding 128
Exterior rear view mirrors 40
Adjusting 40
Folding electrically 128

Since the transmitting and receiving diodes along with the digital data bus system's (D2B) chip are
automatically shut off if they are not needed (sleep mode), a wake-up pulse, which activates the system, is
required to start a new data transfer. This is accomplished via the separate wake-up line. For this purpose, the
master unit actuates the wake-up signal (electrical signal), which allows the voltage in the wake-up line to
decrease to a defined value. The chip of the digital data bus system (D2B) in the components recognizes on
account of the duration of the signal that this is a wake-up signal, and the digital data bus (D2B) is then
activated. Therefore the digital data bus (D2B) is then in an activated state. A "wake-up" can take place in a
quiescent system (sleep mode) even without the wake-up pulse of the master unit by activation of a component
located at the digital data bus (D2B).
Wake-up diagnosis
For diagnosis of the wake-up circuit in the components, the master unit can trigger a wake-up diagnosis signal
using STAR DIAGNOSIS and the data link connector (X11/4). This signal differs from the wake-up signal by
the fact that it has a significantly longer duration. The components react to this long wake-up pulse with a signal
on the wake-up line (message to master unit). This allows the master unit to recognize which components have
received the long wake-up pulse. The wake-up diagnosis signal can only be actuated when the digital data bus
(D2B) cannot be activated due to an error. If all components reply to the master unit, then their voltage supply is
correct.
FIBER OPTIC CABLE, LOCATION - GF82.00-P-4000-01GH
Model 163
Components for ECE version
Fiber optical cable,
location/task/functionExcept model 208.4GF82.00-P-4000A

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 13 © 2006 Mitchell Repair Information Company, LLC.

as a synchronization signal. The electronic control in the display unit evaluates the RGB signaland actuates the
individual pixels line by line according to color and intensity.
A horizontal synchronization pulse is output at the end of each line. The electronic circuitry of the display unit
then starts the next line. After reaching the last line on the display, a vertical synchronization pulse is output and
the electronic circuitry starts again with the first line.
Audio signal output
The audio signals from the various sources (CD, voice output for route guidance, ...) are processed by the radio
and navigation module (A2/ 56) and amplified before output over the vehicle loudspeakers . On vehicles
with sound system (code 810) final amplification of the audio signals is accomplished by the sound amplifier
(A2/13) . For this purpose audio source data is transmitted to the sound amplifier (A2/13) via the digital data
bus ( D2B ).
Diagnosis interface (K bus) and D2B component error management
During the radio and navigation module (A2/56) mode the system stores all errors which occur in the non-
volatile memory. These errors can then be read out on the diagnostic interface (K bus) with Star diagnosis .
Output of the errors on the display unit is not possible.
Error management also includes components connected to the digital data bus ( D2B ).
Each D2B component has its own DTC memory . The errors are transmitted to the radio and navigation
module (A2/56) via the digital data bus (D2B) on request by STAR diagnosis and can then be read out with the
diagnostic interface.
Navigation processor and GPS control module
The navigation processor is the central component of the radio and navigation module (A2/56) . It is
integrated into the radio and navigation module (A2/56)and calculates the location and vehicle route from the
incoming signals after entering the route.
The GPS control module is a part of the navigation processor. It evaluates the satellite signals distributed by
the CTEL/GPS roof antenna (A2/49) and the CTEL and GPS antenna splitter (A2/57) and calculates with
this information the vehicle position.
CD-ROM and CD drive
With the aid of the navigation CD drive it is possible to read data from the special navigation CD or play
audio CD's or play .
The following is stored on the navigation CD-ROM :
Program data for execution in navigation processor
Voice data for voice output

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:05 PMPage 103 © 2006 Mitchell Repair Information Company, LLC.

Fig. 85: MCS Cassette Mode Block Diagram
Playback of compact discs
When the" Open " button is pressed the display opens au tomatically releasing the slot for the compact 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 avai lable for playback of the CC :
Auto reverse

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electr ical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:06 PMPage 140 © 2006 Mitchell Repair Information Company, LLC.

The personal symbols on the map are not updated during active guidance.
Voice control does not react to commands
Occasionally no sound (duration approx. 1 second).
TV screen switches off when standing still
After switching on CD player plays CD1/track 1 instead of title played last
No message when CD magazine sticks during ejection
Wavy interference in navigation display when TV picture is switched off (as if station is not correctly
received)
TCS icons are occasionally not displayed on the map with active dynamic guidance
Telephone book is not activated.
COMAND: A 208 820 40 89, A 210 820 54 89, A 163 820 14 89
Error patterns:
Increased quiescent current.
The personal symbols on the map are not updated during active guidance.
Voice control does not react to commands
No message when CD magazine sticks during ejection
TCS cannot be activated sporadically.
Time in instrument cluster and COMAND differs approx. 1-2 seconds.
COMAND signals CD reading error without any obvious cause
PERFORMING SOFTWARE DOWNLOAD - AF82.85-P-6000-04A
COMAND 2.0-ECE / 2.5-ECE - Perform software download of CD:
Do not start vehicle during download, do not cause other voltage drops in the vehicle electrical system, do
not remove CD and do not switch off unit! (Unit will be damaged!)
In the case of erroneous operation of the download control module, the download starts again or is terminated if
the old software has not been erased previously.
1. Switch off ignition.
2. Remove navigation CD and insert download CD.
3. Switch off control module.
4. After a waiting time of min. 5 s and with buttons * and # pressed simultaneously, switch on unit.
The menu "Service download of CD" appears with menu points "Control module" and "Termination".
5. Select "Start control module" with right knob

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:07 PMPage 181 © 2006 Mitchell Repair Information Company, LLC.

The date or the version of the currently stored software and the software on the CD appears in the
display.
By pressing the right knob the download is started. After some seconds the system changes to screen
"CD ROM software download".
On the download control module the main processor software is loaded first, then the graphic
processor software. Entire duration: approx. 40 minutes
The download progress is indicated by a bar graph.
In the event of errors an error message is indicated on the display.
When the download is completed, the display switches off for a short time. When it is switched back on
again the result of the download is displayed.
6. Remove download CD and reinsert navigation CD.
FAULT IN COMAND OPERATING AND DISPLAY SYSTEM - AF82.85-P-6000N
MODEL 163, 203, 208, 210, 215, 220, 463 with CODE (352a) COMAND operating and display system
with CODE (801) Model year 2001
MODEL 414 with CODE (EN4) Auto pilot system with TMC interface, large display with CODE (EN3)
Auto pilot system with GSM interface, large display
Modification notes
Operation no. of operation texts or standard texts and flat rates
26.11.01Supersedes AF82.85-P-
6000N dated 09.01.2002
Part numbers added and
changedAF82.85-P-6000-01B
CategoryOp. no.Operation textTimeAcc. no.Code
P829905PERFORMING SW
UPDATE FOR
RADIO/COMAND003 WU/0.3 h--
Damage codeCauseRemedy
Software error Error patterns for
COMAND update CD
10/2001.AF82.85-P-6000-01B
1 Perform COMAND
updateAF82.85-P-6000-04A
Update only
COMAND with the
following part numbers.
A 163 820 14 89

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:07 PMPage 182 © 2006 Mitchell Repair Information Company, LLC.