1997 MERCEDES-BENZ ML350 light

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.

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.

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.

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.

How it works
An infrared transmitter (2)sends infrared light to a lens (1) which directs the beam to the windshield (4) . The
intensity of the light reflected by the windshield is measured by an IR receiver (3)located at the opposite end of
the lens.
Dry windshield (Fig. A)
When the area around the rain sensor (B38) is dry nearly all of the light is reflected and the IR receiver
(3) measures a high level of light intensity.
Wet windshield (Fig. B)
When the reflection area is wet, some of the light is scattered away from the glass of the windshield. This
reduces the intensity of the reflected light and the IR receiver (3) measures a lower level of light intensity.
The light intensity measured by the IR receiver (3) provides a measure of the rain intensity on the windshield.
Lower light intensities indicate higher levels of rain intensity on the windshield.
Fig. 26: Identifying Infrared Transmitter And IR Receiver

Rain sensor data flow
The rain sensor (B38) networks with the All Activity Module (AAM, N10) via the engine compartment CAN.
More than
just a "rain sensor," the unit also comprises integrated light sensors for the vehicle lighting

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 48 © 2006 Mitchell Repair Information Company, LLC.

system . Data from the light sensors is also sent to the All Activity Module (AAM, N10) via the engine
compartment CAN.
Power supply
Power is supplied to the rain sensor (B38) via KI. 15 so that these functions are available only when the ignition
is on.
RAIN SENSOR - LOCATION/TASK/DESIGN/FUNCTION - GF82.30-P-4103GH
MODEL 163 with code 345a Rain sensor
Fig. 27: Identifying Rain Sensor Location

Rain Sensor - LocationThe rain sensor (B38) is
adhered to the inside
surface of the windshield.
Rain Sensor - TaskThe rain sensor (B38)
assesses the rain
intensity on the
windshield and
automatically adjusts the
intermittent wiper speed.
In addition, light sensors
gauge ambient light

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:05 PMPage 49 © 2006 Mitchell Repair Information Company, LLC.