Page 1529 of 4133

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
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Page 1530 of 4133

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.
Page 1531 of 4133

MODEL 163 as of 1.12.99
The entrance and exit lamps in the front and rear doors (E17/3, E17/4, E17/5 and E17/6) are actuated by
the extended activity module (EAM) when the corresponding door is opened and when the dome lamp is
switched on.
The switch-on time for the entrance/exit lamps corresponds to that of the interior lighting.
Fig. 18: Identifying Actuating Entrance/Exit Lamps
ACTUATING REAR DOME LAMP, FUNCTION - GF82.20-P-4005GH
MODEL 163
A slide switch with three positions is integrated into the rear dome lamp (E15/3) . The lamp is connected to
circuit 30. Three modes can be selected with the slide switch:
"Automatic" (1). The second lamp terminal is connected to the rotary tumbler/tailgate microscwitch
(S88/1) which completes the circuit to circuit 31 when the tailgate is opened.
Continuous "on" (2). The second terminal in the lamp is connected to circuit 31.
Continuous "off" (3).
Switching interior lighting
on/off manually, function GF82.20-P-2009GH
Switching interior lighting
on/off automatically,
function GF82.20-P-2010GH
Extended activity module,
location/purpose GF54.21-P-4106GH
2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 36 © 2006 Mitchell Repair Information Company, LLC.
Page 1532 of 4133
Fig. 19: Identifying Rear Dome Lamp
ACTUATING FOOTWELL LAMPS, FUNCTION - GF82.20-P-4008GH
MODEL 163 as of 1.12.99
The front left and right footwell lamps (E17/16 and E17/15) dome lamp (with shut-off delay and reading
lamp) (E15/2) automatically.
The switch-on time of the footwell lamps depends on the dome lamp.
are actuated each time the front is switched on manually or
Fig. 20: Identifying Actuating Footwell Lamp
Rotary tumbler
microswitches GF82.20-P-4105GH
Switching interior
lighting on/off manually, GF82.20-P-2009GH
2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 37 © 2006 Mitchell Repair Information Company, LLC.
Page 1533 of 4133

ROTARY TUMBLER MICROSWITCHES, LOCATION - GF82.20-P-4105-01GH
The rotary tumbler microswitch is installed in the rotary tumbler.
Left rear rotary tumbler is shown
Fig. 21: Identifying Rotary Tumbler Microswitches, Location
ROTARY TUMBLER MICROSWITCHES, FUNCTION - GF82.20-P-4105-02GH
The contact in the left rear rotary tumbler microswitch (S87/2), the right rear rotary tumbler microswitch
(S87/3), the right front door rotary tumbler microswitch (S87/6), the left front door rotary tumbler microswitch
(S87/7) or the rear door rotary tumbler microswitch (S88/1) is closed when the respective door is closed (rotary
tumbler snapped in place). The status of the switch contact is read by the All Activity Module (AAM)(N10).
The central locking microswitches, which are also installed in the rotary tumbler, indicate whether a door is
locked or unlocked. These microswitches are no longer used as of 31.08.02.
ROTARY TUMBLER MICROSWITCHES, LOCATION/TASK/DESIGN/FUNCTION - GF82.20-P-4105GH
MODEL 163
function
Switching interior
lighting on/off
automatically, function GF82.20-P-2010GH
Rotary tumbler
microswitches, location GF82.20-P-4105-01GH
Rotary tumbler
microswitches, taskSignal whether vehicle
doors are closed/open to
2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 38 © 2006 Mitchell Repair Information Company, LLC.
Page 1534 of 4133

WIPER SYSTEM (WS), FUNCTION - GF82.30-P-0003GH
MODEL 163
Function
The windshield wiper system is operated with the combination switch (S4) .
The following functions can be selected with the switch:
Actuating switch upward: Wiping windshield at slow (stage 1) or fast (stage 2) speed.
Actuating switch downward: Intermittent windshield wiping (on vehicles with rain sensor (code 345a)
this function is actuated by the rain sensor (B38).
Actuating switch indirection of steering column: Washing windshield
The wiper system of the rear window is operated with the wipe/wash rear window switch (S78) . The
following functions can be selected:
Intermittent rear window wiping (on vehicles with rain sensor (code 345a) this function is actuated by
the rain sensor (B38).
Washing rear window
AAM.
Rotary tumbler
microswitches, designThe rotary tumbler
microswitches are single-
pole normally open
contacts.
Rotary tumbler
microswitches, function GF82.20-P-4105-02GH
Windshield wiper GF82.30-P-3004GH
Intermittent wiping on
windshield GF82.30-P-3003GH
Windshield washer GF82.35-P-3002GH
Rear window washer GF82.35-P-3001GH
Intermittent wiping for
rear windowup to 31.8.00GF82.30-P-3001GH
as of 1.9.00GF82.30-P-3001GK
Location of components,
wiper system Windshield GF82.30-P-0005-01GH
Location of components,
wiper system Rear
window GF82.30-P-0004-01GH
All-activity moduleup to 30.11.99GF54.21-P-4100GH
2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
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Page 1535 of 4133
REAR WINDOW WIPER SYSTEM, LOCATION OF COMPONENTS - GF82.30-P-0004-01GH
Location of components
Fig. 22: Identifying Rear Window Wiper System Components Location
WINDSHIELD WIPER SYSTEM, LOCATION OF COMPONENTS - GF82.30-P-0005-01GH
Location of components
as of 1.12.99GF54.21-P-4100GK
2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 40 © 2006 Mitchell Repair Information Company, LLC.
Page 1536 of 4133
Fig. 23: Identifying Windshield Wiper System Components Location
As of 1.9.00 the vehicle is also offered with rain sensor (B38) code 344a. It is glued to the windshield.
CONTENTS - FUNCTION DESCRIPTION OF WIPER SYSTEM (WS) - GF82.30-P-0998GH
MODEL 163
Wiper system, function GF82.30-P-0003GH
Rear window wiper system,
location of components GF82.30-P-0004-
01GH
Windshield wiper system, location
of components GF82.30-P-0005-
01GH
Intermittent wiping for rear
window, functionup to 31.8.00GF82.30-P-3001GH
as of 1.9.00GF82.30-P-3001GK
Windshield intermittent wipe,
function GF82.30-P-3003GH
Windshield wiper, function GF82.30-P-3004GH
Anti-block device for wiper motor,
function GF82.30-P-4008GH
Rear window washer, function GF82.35-P-3001GH
Windshield washer, function GF82.35-P-3002GH
2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 41 © 2006 Mitchell Repair Information Company, LLC.