lights MERCEDES-BENZ ML320 1997 Complete Service Manual

XENON HEADLAMPS, FUNCTION - GF82.10-P-2007-01GH
Function
The combustion chamber of the xenon lamp is filled with xenon and a mixture of metal halide salts. This
mixture is ignited by high voltage. The color of the light has a characteristic similar to daylight.
When the low beam lamps are switched on the xenon headlamp control module (E1 n1, E2n1) activates the
xenon headlamp control module and ignition module (E1n2, E2n2) via the control voltage within a few
milliseconds.
As a result of a high voltage surge (approx. 20 kV) of the ignition device, an arc forms between the electrodes,
and the xenon lamp is ignited.
When an arc of sufficient stability is detected, the control electronics of the xenon lamp control module (E1n1,
E2n1) switches over to power-limiting mode. The electric power is regulated to 35 W. A voltage converter
generates the voltage of approx. 85 V (~) necessary for the reliable function of the xenon lamp. For technical
reasons the xenon lamp has a timed startup characteristic. After switching on, 50 % of the luminosity is reached
within 1 to 2 seconds and full luminosity is reached after approx. 30 seconds.
Model 163, up to
31.08.01GF82.10-P-0001GH
Model 163 as of
1.09.01GF82.10-P-
0001GHA
Xenon headlamps, functionModel 163, up to
31.08.01GF82.10-P-2007-
01GH
Model 163 as of
1.09.01GF82.10-P-2007-
01GHA
Automatic driving light actuation,
functionModel 163 as of
01.09.01GF82.10-P-3003GH
Daytime running light control, functionModel 163 as of
01.09.01GF82.10-P-3005GH
Locator lighting, functionModel 163 as of
01.09.01GF80.20-P-2008GH
Headlamp cut-in, functionModel 163 as of
01.09.01GF80.20-P-2003GH
Daytime running lights, functionModel 202 with
Code 236a special
lamp circuit for
daytime running
lampsGF82.10-P-2002A
Contents - Function description of
exterior lighting,
location/task/design/functionModels 129, 140,
163, 202, 208, 210
with code 612b
xenon headlamp unitGF82.10-P-9999B

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 20 © 2006 Mitchell Repair Information Company, LLC.

Fig. 11: Identifying Xenon Headlamp Components Location/Design
AUTOMATIC DRIVING LIGHT ACTUATION, FUNCTION - GF82.10-P-3003GH
MODEL 163 as of 01.09.01
The Automatic Driving Light Actuation automatically switches on the driving lights (side lamps, low beams
and license plate lamps), depending on the exterior lighting conditions (rain, snow, dusk and darkness).
Function prerequisites:
Exterior lamp switch in "AUTO" position
Circuit 15 "ON"
The sun sensor (B32) signals "Darkness" or the rain sensor (B38) signals "Rain"
Basic prerequisites for automatic driving light actuation are:
diminishing daylight intensity at dusk
darkness (tunnel, underground garage, ...)
rain or snowfall and
failure of rain/sun sensor ("Darkness" is signaled continuously)
Xenon headlamps,
function GF82.10-P-2007-
01GHA

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 23 © 2006 Mitchell Repair Information Company, LLC.

Fog and other lighting influences, e.g., due to oncoming traffic, do not have any effect on the automatic
driving light actuation.
Automatic driving light actuation when starting a journey and during it
Automatic driving light actuation with driving lights is only possible when the engine is running (circuit
61 ON).
When the engine is switched off and the electronic starter switch is in position "2" (circuit 15 ON) only
the side lamps and the license plate lamps are actuated.
Driving light actuation is disabled as soon as one of the basic prerequisites changes, e.g. when changing
from darkness to daylight after driving through a tunnel.
Automatic driving light actuation at the end of a journey or in darkness
After switching off the engine (circuit 61 OFF) and when the electronic starter switch is in position
"2" (circuit 15 ON), only the side lamps and the license plate lamps remain on.
The exterior lighting is switched off as of key position "1" (circuit 15R).
DAYTIME RUNNING LIGHT ACTUATION, FUNCTION - GF82.10-P-3005GH
MODEL 163 as of 01.09.01
With daytime running lamps the low beam, the side lamps and the license plate lamps are switched on if the
engine is running (there are national variants).
Function prerequisites:
Circuit 61 "ON"
In "AUTO" position of the exterior lamp switch daytime running lamps and automatic driving lights are
OR gated, i.e. depending on the prerequisites daytime running lamps or automatic driving lights are switched
on.
For the daytime running lamp conditions, there is no difference between the positions "0" and "AUTO" of
the exterior lamp switch.
Corresponding to the national legislation, the daytime running lamps can be coded in different variants via
Star Diagnosis.
Canada and USA
Table of contents,
function description for
exterior lighting GF82.10-P-0999A

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 24 © 2006 Mitchell Repair Information Company, LLC.

during the day only the low beam is on
when dark, the side lamps, license plate lamps as well as the switch and controls illumination (circuit
58d) are switched on
With halogen headlights the low beam is operated during the day with a reduced voltage
The lighting switches off automatically if the gearshift lever remains in "P" or "N" position for more than
3 min
Scandinavia
with daytime running lamps the low beam, the side lamps and the license plate lamps are active
the daytime running lamps switch off if the light switch assumes the "side lamps ON" position
Other countries
with daytime running lamps the low beam, the side lamps and the license plate lamps are active
the daytime running lamps are always active
The high beams can only be switched on if the exterior lamp switch:
is at "low beam"
is at "AUTO" and "Darkness" is detected
daytime running lamps for "Other countries" has been coded
CONTENTS - FUNCTION DESCRIPTION OF EXTERIOR LIGHTING, LOCATION/ PURPOSE/DESIGN/FUNCTION -
GF82.10-P-9999B
MODELS 129, 140, 202, 208, 210, 163 up to 31.08.01 with CODE (612b) xenon headlamp unit
MODEL 163 as of 01.09.01 with CODE (614) bi-xenon headlamp unit
Automatic driving light
actuation, function GF82.10-P-3003GH
Table of contents,
function description for
exterior lighting GF82.10-P-0999A
Axle sensor for headlamp range
adjustment, location/taskMODELS 129, 140,
202, 208, 210 with
code 612b xenon
headlamp unitGF82.10-P-2100A
Headlamp range adjustment motor,
location/ taskMODELS 129, 140,
202, 208, 210 with
code 612b xenon
headlamp unitGF82.10-P-2101A

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 25 © 2006 Mitchell Repair Information Company, LLC.

INTERIOR LIGHTING (IL), FUNCTION - GF82.20-P-0002GH
MODEL 163
The interior lighting can be switched on in two ways: Manually with
the switches for the individual light
automatically by
opening the doors
Switching off the ignition
Locking the vehicle with the central locking feature
Following an accident
CONTENTS - FUNCTION DESCRIPTION OF INTERIOR LIGHTING (IL) - GF82.20-P-0998GH
MODEL 163
Switching on interior
lighting manually GF82.20-P-2009GH
Switching on interior
lighting automatically GF82.20-P-2010GH
Interior lighting, location of
components GF82.20-P-0002-01GH
Function description,
interior lights GF82.20-P-0002GH
Switching interior lights
on/off manually, function GF82.20-P-2009GH
Switching interior lights
on/off automatically,
function GF82.20-P-2010GH
Control of operating period
of interior lights, function GF82.20-P-3001GH
Dimming interior lights,
function GF82.20-P-3002GH
Actuating rear dome lamp,
function GF82.20-P-4005GH
Actuating entrance/exit
lamps, functionas of 12.99GF82.20-P-4004GH
Actuating footwell lamps,
functionas of 12.99GF82.20-P-4008GH
Rotary tumbler GF82.20-P-4105GH

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 31 © 2006 Mitchell Repair Information Company, LLC.

SWITCHING INTERIOR LIGHTS ON/OFF MANUALLY, FUNCTION - GF82.20-P-2009GH
MODEL 163
The front dome lamp (with shut-off delay and reading lamp) (E15/2) , the right rear dome lamp (E15/9)
and the left rear dome lamp (E15/8) can be switched manually to continuous operation. Each lamp is equipped
with a switch which is actuated by pressing the lamp glass.
The actuated switch interrupts the automatic lamp actuation by the all-activity module (AAM, N10) and
simultaneously switches the lamp connected to c. 30 to ground. Continuous operation can only be terminated by
pressing the switch again. It is not possible to switch off the automatic lamp actuation.
The left front and right front footwell lamps (E17/16 and E17/15) are switched on together with the front
dome lamp (E15/2) The rear interior lamp (E15/3) can also be switched manually to continuous operation.
Automatic lamp actuation is actuated directly when the tailgate is opened and not by the all-activity module. It
is not possible to switch off automatic lamp actuation manually.
Fig. 16: Identifying Front Dome Lamp (With Shut
-Off Delay And Reading Lamp)
microswitches,
location/purpose/
design/function

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 32 © 2006 Mitchell Repair Information Company, LLC.

Fig. 17: Identifying Left Rear Dome Lamp And Right Rear Dome Lamp
SWITCHING INTERIOR LIGHTS ON/OFF AUTOMATICALLY, FUNCTION - GF82.20-P-2010GH
MODEL 163
Automatic actuation of interior lights is triggered by
opening a door,
unlocking vehicle with transmitter key,
switching off ignition within 30 seconds of switching off exterior lighting (terminal 58k)
or
after crash recognition.
When opening a door, the respective rotary tumbler microswitch (S87/2, S87/3, S87/6 or S87/7) is actuated
and a signal for automatic light actuation is sent to All-Activity-Module (AAM, N10)
With crash recognition by ETR control module with airbag (ETR/ AB, N2/2) up to 11.99 or by restraint
systems control module (N2/7) as of 12/99, signal for automatic light actuation is sent to All-Activity-Module
via a separate cable.
All-Activity-Module actuates correspondin
g interior lights dimmed and switches them off again, after expiry of
Actuating rear dome
lamp GF82.20-P-4005GH
All-activity module
(AAM) GF54.21-P-4100GH

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 33 © 2006 Mitchell Repair Information Company, LLC.

switched-on time.

Lights switched on manually cannot be switched off by All-Activity-Module.
Rear interior lamp (E15/3) is actuated directly by opening of rear door and not via All-Activity-Module.
Front and rear entrance and exit lamps (E17/3, E17/4, E17/5 and E17/6) introduced as of 12/99 are
actuated via the Extended-Activity-Module (EAM) when corresponding door is opened.
Following table shows which lights are switched on automatically, according to triggering.
Event
Dome
lamp with
delay and
reading
lamp, frontFootwell
lamp, front
left or ri
ght
(as of
12.99)
Entrance/exit
lamp, front left or
right door (as of
12.99)
Dome
lamp,
front leftDome
lamp, rear
right
Entrance/exit
lamp, rear left or
right door (as of
12.99)
Driver door or
front passenger
door openedXXX
Rear left door
or rear right
door opened XXX
Central
locking
unlockedXX XX
Ignition "Off"XX XX
Crash
recognitionXX XX
Control of interior lighting switch-on time,
function GF82.20-P-
3001GH
Dimming interior lighting, function GF82.20-P-
3002GH
Control of rear dome lamp, function GF82.20-P-
4005GH
Rotary tumbler microswitch, location/purpose/
design/function GF82.20-P-
4105GH
Locking with transmitter key, functionUp to 11/99GF80.20-P-
3005GH
Arrangement/purpose/design/function of All-
Activity-Module (AAM)Up to 11/99GF54.21-P-
4100GH
Arrangement/purpose of Extended-Activity-
Module GF54.21-P-
4106GH
Supplemental restraint system (SRS), functionUp to 11/99GF91.60-P-

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 34 © 2006 Mitchell Repair Information Company, LLC.

CONTROL OF OPERATING PERIOD OF INTERIOR LIGHTS, FUNCTION - GF82.20-P-3001GH
MODEL 163
The switch-on time for the interior lights is controlled by the all-activity module (AAM) (N10) . All lights are
faded off.
When the doors are open the corresponding lamps are switched off after 30 min.
After closing the last front door or last rear door the corresponding lights are switched off after 10 s.
After recognition of a crash the interior lights are switched back off after 30 min.
When the ignition is switched on all of the lights are switched off immediately.

Lights switched on manually are not switched off by the AAM
SWITCHING OFF INTERIOR LIGHTS WITH FADE-OFF FEATURE, FUNCTION - GF82.20-P-3002GH
MODEL 163
The interior lights are faded on and off by the all-activity module (AAM) (N10) . For this purpose the lamps
are actuated by the AAM with a square wave voltage. The frequency of the square wave voltage is 122 Hz and
remains constant. Only the on/off ratio of the square wave voltage is changed during fade on from 0 to 100 %
within 2.5 s. When fading off the on/off ratio is reduced from 100 % to 0 % within 2.5 s.
ACTUATING ENTRANCE/EXIT LAMPS, FUNCTION - GF82.20-P-4004GH
0002GH
As of 12/99GF91.60-P-
0002GI
Switching off interior
lights with face-off
feature GF82.20-P-3002GH
Switching interior lights
on/off manually, function GF82.20-P-2009GH
Switching interior lights
on/off automatically,
function GF82.20-P-2010GH
All-activity module
(AAM) GF54.21-P-4100GH
All-activity module
(AAM) GF54.21-P-4100GH

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 35 © 2006 Mitchell Repair Information Company, LLC.

SELF-DIAGNOSTIC SYSTEM
INTERIOR LIGHTS DIAGNOSIS CONTENTS - AD82.20-P-1000GHZ
MODEL 163
INTERIOR LIGHTS DIAGNOSIS PREVIOUS KNOWLEDGE - AD82.20-P-2000GH
MODEL 163
INTERIOR LIGHTS DIAGNOSIS OPERATIONAL CHECK - AD82.20-P-3000GH
menu and ensure that
software status 04/03 is
available.
11 Complete DAS and
finish STAR-
DIAGNOSIS.
A2.20 [] 11bInterior lighting
diagnosis, previous
knowledge AD82.20-P-2000GH
A2.2 [] 12bInterior lighting
diagnosis, function check AD82.20-P-3000GH
A2.2 [] 14bInterior lighting
diagnosis, troubleshooting AD82.20-P-5000GH
A2.2 [] 21bInterior lighting
diagnosis, testing
electrical system AD82.20-P-6000GH
Function description,
interior lighting GF82.20-P-0002GH
Location of components,
interior lighting GF82.20-P-0002-01GH
Electric wiring diagram,
interior lighting PE82.20-P-2000G
Inter-function groups of
wiring diagrams PE00.19-P-1100E
Connection and use of
test equipment AD00.00-P-1000AZ
Diagnostic tools, interior
lighting AD54.21-P-2000-01GH
Assignment of coupling
on door separation points AD72.29-P-2000-03GH

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:07 PMPage 187 © 2006 Mitchell Repair Information Company, LLC.