Sensor MERCEDES-BENZ ML500 1997 Complete Owner's Manual

Fig. 2: Removing Side Air Bag Unit (2000 Models)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
SIDE AIR BAG SENSOR (DRIVER-SIDE & PASSENGER-SIDE)
Removal & Installation
1. Before proceeding, See AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See
DISABLING & ACTIVATI NG AIR BAG SYSTEM
. Remove ignition key. On SLK 230, remove
door sill moulding. On all models, re move front seat. Fold floor covering in area toward rear. Unclip
connector on side bag sensor. Remove 2 mounting screws. Rem ove sensor from vehicle.
2. To install, reverse removal proce dure. Ensure that arrow on sensor poi nts toward outside. Perform system
operation check to ensure system is functioning properly. See SYSTEM OPERATION CHECK
.

2001 Mercedes-Benz ML320
2000-01 ACCESSORIES/SAFETY EQUIPMENT Merc edes-Benz - Air Bag Restraint Systems
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Fig. 3: Removing Side Air Bag Sensor (2000 E Class Shown; Others Are Similar)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
OCCUPIED SEAT RECOGNITION SENSOR
Removal & Installation
1. Before proceeding, See AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See
DISABLING & ACTIVATI NG AIR BAG SYSTEM
.
2. Remove cover on front seat cushion. Remove i gnition key. Unclip connection for occupied seat
recognition sensor on seat connector block. Remove electrical connection lead from seat and pull upward
out of rubberized fiber matting. See Fig. 4
.
3. To install, lay out occupied seat recognition sens or uniformly on rubberized fiber matting. Fabric side
should point upward. Do not kink occupied seat sens or. Reverse removal procedure. Perform system
operation check to ensure s
ystem is functioning properly. See SYSTEM OPERATION CHECK.

2001 Mercedes-Benz ML320
2000-01 ACCESSORIES/SAFETY EQUIPMENT Merc edes-Benz - Air Bag Restraint Systems
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Fig. 4: Removing Occupied Seat Recognition Sensor (2000 Models)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
PASSENGER-SIDE AIR BAG MODULE
Removal & Installation (C Class)
1. Before proceeding, See AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See
DISABLING & ACTIVATI NG AIR BAG SYSTEM
. Remove ignition key. Remove instrument panel.

2001 Mercedes-Benz ML320
2000-01 ACCESSORIES/SAFETY EQUIPMENT Merc edes-Benz - Air Bag Restraint Systems
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module. If HHT displays an "F", go to step 3.2.
Read TEST CONNECTION (NOT FOR HHT) column. Horn -air bag clockspring connector A45x1, terminals
No. 1 and 2 are identified. Read TEST CONDITION column. Test circuit with HHT connected to DLC.
Remove ignition key. Connect Resist ance Substitution Unit (124 589 09 63 00) to horn-air bag clockspring
connector A45x1. Set resistance s ubstitution unit to 2 ohms. Read NOMINAL VALUE-HHT DISPLAY
column. If HHT displays a check, check horn-air ba g clockspring for continuity. Replace horn-air bag
clockspring as necessary. If HHT displays an "F", go to step 3.4.
MODEL IDENTIFICATION
COMPONENT IDENTIFICATION
NOTE: Some testing is identified
by model number. Refer to table to identify models by
model number. See MO DEL IDENTIFICATION
table.
Model NumberModel
129SL Class
140S Class
163M Class
170SLK Class
202C Class
203C 240 & C 320
208CLK Class
210E Class
215CL 500
220S 430 & S 500
ComponentManufacturer's Designation
A1e15SRS warning light
A45Horn-air bag clockspring
A53Driver-side air bag sensor
A54Passenger-side air bag sensor
B41-1Passenger-side seat occupied recognition sensor
N2-2SRS control module
N2-7SRS control module
N72e1Automatic child seat recognition light
R12-1Driver-side ETR squib connector
R12-2Passenger-side ETR squib connector
R12-3Driver-side air bag squib connector
R12-8Passenger-side air bag squib connector
R12-9Side air bag (driver-side) squib connector
R12-10Side air bag (passenge r-side) squib connector
R12-20Passenger-side air bag squib

2001 Mercedes-Benz ML320
2000-01 ACCESSORIES/SAFETY EQUIPMENT Merc edes-Benz - Air Bag Restraint Systems
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Saturday, October 02, 2010 3:44:46 PMPage 21 © 2006 Mitchell Repair Information Company, LLC.

Fig. 55: Connecting Resistance Substituti on Unit (2000 Models)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig. 56: Testing Side Air Bag Sensor (2000 Models)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320
2000-01 ACCESSORIES/SAFETY EQUIPMENT Merc edes-Benz - Air Bag Restraint Systems
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Saturday, October 02, 2010 3:44:46 PMPage 65 © 2006 Mitchell Repair Information Company, LLC.

Fig. 57: Testing Seat Occupation Recognition Sensor (2000 Models)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320
2000-01 ACCESSORIES/SAFETY EQUIPMENT Merc edes-Benz - Air Bag Restraint Systems
me
Saturday, October 02, 2010 3:44:46 PMPage 66 © 2006 Mitchell Repair Information Company, LLC.

Fig. 58: Testing Seat Occupation Recognition Sensor (2000 Models)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
WIRE REPAIR
If any part of SRS wiring harness is damaged, DO NOT repair wiring harness, replace complete wiring harness.

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1
Contents
IntroductionProduct information .......................... 7
Roadside assistance ......................... 10
Where to find it ................................ 14
Reporting Safety Defects ................ 16Instruments and controlsInstruments and controls ............... 18 Center console .............................. 20
Overhead control panel ............... 21OperationVehicle keys ...................................... 24
Start lock-out .................................... 25
General notes on the central locking system ............... 26
Central locking system ................... 26 Radio frequency
remote control .............................. 26
Unlocking the liftgate .................. 28
Panic button .................................. 28
Mechanical keys ........................... 29 Doors ................................................. 30
Central locking switch .................... 32 Automatic central locking .......... 32
Emergency unlocking in case of accident ................................... 33
Liftgate .............................................. 34
Antitheft alarm system ................... 35
Tow-away alarm and glass breakage sensor ............... 36
Seats, front ....................................... 37
Manual seats ................................ 39
Power seats ................................... 40
Head restraint ...............................41
Heated seats ..................................... 44
Seat belts and integrated restraint system .......................... 46
Seat belts .......................................... 46 Seat belt nonusage
warning system ............................ 47
BabySmart
TM airbag
deactivation system ................... 53
Self-test BabySmart
TM
without special child
seat installed ................................ 53 Supplemental restraint
system (SRS) ................................ 54
Emergency tensioning retractor (ETR) ............................. 55
Airbags .............................................. 56 Safety guidelines for the
seat belt, emergency
tensioning retractor
and airbag ..................................... 63
Infant and child
restraint systems .......................... 65
Adjustable steering wheel .............. 70
Inside rear view mirror .................. 71 Antiglare night position .............. 71
Exterior rear view mirrors ............. 73 Exterior rear view mirror,
electrically folding ....................... 75
Instrument cluster ........................... 76
Indicator lamps in the instrument cluster ...................... 78
Trip computer ................................... 83
Flexible service system (FSS) ........ 87
Engine oil level indicator ................ 89
Exterior lamp switch ....................... 90

22
Contents - Operation
Te ch n ica l
data
Instruments
and controls Operation
Driving Instrument
cluster display Practical hints Car care Index
OperationVehicle keys ...................................... 24
Start lock-out .................................... 25
General notes on the central locking system ............... 26
Central locking system ................... 26 Radio frequency
remote control .............................. 26
Unlocking the liftgate .................. 28
Panic button .................................. 28
Mechanical keys ........................... 29
Doors .................................................. 30
Central locking switch .................... 32 Automatic central locking .......... 32
Emergency unlocking in case of accident .................................... 33
Liftgate ............................................... 34
Antitheft alarm system ................... 35
Tow - aw ay a lar m a n d glass breakage sensor ................ 36
Seats, front ........................................ 37 Manual seats ................................. 39
Power seats ................................... 40 Head restraint ...............................41
Heated seats ..................................... 44
Seat belts and integrated restraint system .......................... 46
Seat belts .......................................... 46 Seat belt nonusage
warning system ............................ 47
BabySmart
TM airbag
deactivation system ................... 53
Self-test BabySmart
TM
without special child
seat installed ................................ 53
Supplemental restraint system (SRS) ............................... 54
Emergency tensioning retractor (ETR) ............................ 55
Airbags .............................................. 56 Safety guidelines for the
seat belt, emergency
tensioning retractor
and airbag ..................................... 63
Infant and child
restraint systems ......................... 65
Adjustable steering wheel .............. 70
Inside rear view mirror ...................71 Antiglare night position .............. 71
Exterior rear view mirrors ............. 73 Exterior rear view mirror,
electrically folding ....................... 75
Instrument cluster ........................... 76
Indicator lamps in the instrument cluster ...................... 78
Trip computer ................................... 83
Flexible service system (FSS) ........ 87
Engine oil level indicator ................ 89
Exterior lamp switch ....................... 90
Fo g la mp sw itch (except Canada) .......................... 92
Fo g la mp sw itch (Canada only) .............................. 93
Hazard warning flasher switch ............................................ 94
Headlamp cleaning system ............ 94
Windshield wiper/washer switch ............................................ 95
Rear window wiper/washer ........... 96
Climate control ................................. 98
Basic setting – Heater ............... 100

36
Tow-away protection
Te ch n ica l
data
Instruments
and controls Operation
Driving Instrument
cluster display Practical hints Car care Index
Tow-away alarm and glass breakage sensor
The switch is located in the overhead console.
The tow-away alarm and glass breakage sensor are part
of the antitheft alarm system.
Once the alarm system has been armed, the turn signal
lamps will flash rapidly and the horn will sound when
someone attempts to raise the vehicle, or breaks a
window and reaches into the passenger compartment. The alarm will last approximately 3 minutes in the form
of rapidly flashing turn signal lamps. At the same time
the horn will sound for approximately 30 seconds. The
alarm will stay on even if the vehicle is immediately
lowered.
If the alarm stays on for more than 20 seconds, an
emergency call is initiated automatically. See Tele Aid
on page 148.
To prevent triggering the tow-away alarm feature, switch
off the tow-away alarm and glass breakage sensor before
towing the vehicle, or when parking on a surface subject
to movement, such as a ferry or auto train.
To do so, turn key in steering lock to position 1, then
return it to position 0 and remove key from steering
lock.
Within 30 seconds, push left or right button. (On
vehicles equipped with optional trip computer, push
RESET or MODE button, display shows OFF.)
Exit vehicle, and lock vehicle with remote control.
The tow-away alarm and glass breakage sensor remain
switched off until the key is inserted in steering lock
and turned to position 1.