1997 MERCEDES-BENZ ML320 Complete Repair Manual

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Page 785 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Removal and installation information is not available.
DIAGNOSTICS
Air bag system diagnostic information is not available. All air bag system diagnosis must be carried out using
manufacturers propr

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MERCEDES-BENZ ML320 1997 Complete Repair Manual 2004 ACCESSORIES/SAF ETY EQUIPMENT
Mercedes-Benz - Air Bag Restraint Systems
DESCRIPTION & OPERATION
The main components of Supplemental Restraint System (SRS) are dual-stage driver-side and pas

2004 ACCESSORIES/SAF ETY EQUIPMENT
Mercedes-Benz - Air Bag Restraint Systems
DESCRIPTION & OPERATION
The main components of Supplemental Restraint System (SRS) are dual-stage driver-side and passenger-side
air bag modules, side impact air bag modules, head impact air bag modules , SRS control module, side impact
sensors, AIR BAG warning light, driv er-side and passenger-side Emergency Tensioning Retractors (ETR). See
COMPONENT LOCATIONS
.
COMPONENT LOCATIONS
COMPONENT LOCATIONS
SERVICING
SRS AIR BAG label on driver-side door latch post indicates SRS replacement date for air bag units. All SRS
components must be thoroughly inspected, including wiring harness. Before component replacement, check for
SRS fault codes by performing system operation check. See SYSTEM OPERATION CHECK
. SRS service
life is 10 years from manufactured da te or 10 years from SRS replacement date after accident related repairs are
completed.
SYSTEM OPERATION CHECK
AIR BAG warning light indicates SRS and Emergency Te nsioning Retractor (ETR) system readiness. Turn
ignition on. AIR BAG warning light will illuminate, then turn off after 4-20 seconds indicating SRS system is
functioning properly. If AIR BAG warn ing light does not illuminate, illuminates while driving or is
continuously illuminated, ther e is a system fault. Repair malfunctioning system.
AIR BAG SAFETY PRECAUTIONS
WARNING:
Accidental air bag deployment is pos sible. Personal injury may result.
Read and follow all WARNINGS and AIR BAG SAFETY PRECAUTIONS

before working on ai r bag system or related components.
ComponentLocation
AIR BAG warning lightInstrument Panel Cluster
ClockspringUnder steering wheel
Driver-side air bag moduleOn steering wheel
Emergency Tensioning Retractor (ETR)Driver-side & passenger-si de lower B- & C-pillars
Head impact air bag modulesDriver-side & passenger-side roof rails
Passenger-side air bag modulePassenger-side instrument panel
Side impact air bag modulesIn front & rear doors
Side impact sensorsOn floor near driver-side & passenger-side B-pillars

2004 Mercedes-Benz ML350
2004 ACCESSORIES/SAFETY EQUIPMENT Merce des-Benz - Air Bag Restraint Systems

2004 Mercedes-Benz ML350
2004 ACCESSORIES/SAFETY EQUIPMENT Mercedes-Benz - Air Bag Restraint Systems
me
Saturday, October 02, 2010 3:40:40 PMPage 1 © 2006 Mitchell Repair Information Company, LLC.
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Saturday, October 02, 2010 3:40:43 PMPage 1 © 2006 Mitchell Repair Information Company, LLC.

Page 787 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Observe these precautions when servicing the air bag system:
When working around SRS components and before any re pairs are performed, disable air bag system. See
DISABLING & ACTIVATI NG AIR BAG

Observe these precautions when servicing the air bag system:
When working around SRS components and before any re pairs are performed, disable air bag system. See
DISABLING & ACTIVATI NG AIR BAG SYSTEM
.
Before straightening any damage to body, or before performing electrical arc-welding, disable air bag
system. See DISABLING & ACTIVATING AIR BAG SYSTEM
.
Always wear safety glasses and gloves when ha ndling a deployed air bag module. Air bag module may
contain sodium hydroxide deposits wh ich are irritating to the skin.
Always use control module and impact sensors made by same manufacturer. Using components produced
by different manufacturers could cause acc idental air bag or ETR deployment.
DO NOT repair any portion of SRS wiring harness.
If any SRS component is dropped from a height greater than 1.6 feet (0.5 m), it must be replaced.
If SRS components show signs of damage, they must be replaced.
Always handle air bag module with tr im cover facing away from your body.
Always place air bag module on workbench with trim cover up, away from loose objects.
DO NOT expose any SRS component to temperatures in excess of 212°F (100°C ).
DO NOT expose any SRS component to grease, oil or cleaning agents.
DISABLING & ACTIVATI NG AIR BAG SYSTEM
DISABLING SYSTEM
Turn ignition off and remove key. Disconnect ne gative battery cable and shield cable end.
ACTIVATING SYSTEM
Ensure no one is in vehicle. Turn ignition on. Connect negative battery cable. Go to SYSTEM OPERATION
CHECK .
DISPOSAL PROCEDURES
Several situations may arise requiring so me form of disposal action, including:
Scrapping a vehicle containing deployed air bag modules and ETRs.
Scrapping a vehicle with live air bag modules and ETRs.
Disposal of a live but electrically faulty air bag module and/or ETR.
Disposal of a deployed air bag module and/or ETR.
DEPLOYED AIR BAG MODULE OR EMERGENCY TENSIONING RETRACTOR (ETR)
Deployed air bag modules and ETRs can be disposed of like any other part.
SCRAPPED VEHICLE

2004 Mercedes-Benz ML350
2004 ACCESSORIES/SAFETY EQUIPMENT Merce des-Benz - Air Bag Restraint Systems
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Page 788 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Undeployed air bag modules and ET Rs cannot be disposed of without first being deployed. Contact
manufacturer for additional information.
UNDEPLOYED AIR BAG MODULE OR EMERGENCY TENSIONING RETRACTOR

Undeployed air bag modules and ET Rs cannot be disposed of without first being deployed. Contact
manufacturer for additional information.
UNDEPLOYED AIR BAG MODULE OR EMERGENCY TENSIONING RETRACTOR (ETR)
Undeployed air bag modules a nd ETR seat belts cannot be disposed of without first being deployed. Contact
manufacturer for additional information.
ON-VEHICLE DEPLOYMENT (SCRAPPED VEHICLE)
1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Park vehicle outdoors with at least 33
feet (10 m) of open space around vehi cle. Disable air bag system. See DISABLING & ACTIVATING
AIR BAG SYSTEM . Place a fully-charged 12-volt batter y 33 feet (10 m) from vehicle.
2. Disconnect all air bag module and emergency tensioning retractors (ETR) connectors. See REMOVAL
& INSTALLATION . Fabricate a deployment harness using 2 wires, each 33 feet (10 m) in length.
Connect deployment harness to selected component to be deployed. Twist opposite ends of deployment
harness together to prevent accidental deployment. Dual-stage air bag modules will require 2 deployment
harnesses.
3. Ensure no one is within 33 feet (10 m) of air bag module. Untwist ends of deployment harness. Connect
wires to battery. Component should deploy. Repeat deployment procedure for remaining components.
OFF-VEHICLE DEPLOYMENT
1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See
DISABLING & ACTIVATI NG AIR BAG SYSTEM
. Remove component to be deployed. See
REMOVAL & INSTALLATION
. Place component in the center of an area with at least 33 feet (10 m)
of clearance on all sides.
2. Attach component to a appropriate object, such as a tire and wheel assembly, to prevent movement.
Fabricate a deployment harn ess using 2 wires, each 33 feet (10 m) in length. Connect deployment harness
to selected component. Twist opposite ends of depl oyment harness together to prevent accidental
deployment. Dual-stage air bag modules will require 2 deployment harnesses.
3. Ensure no one is within 33 feet (10 m) of component . Untwist ends of deployment harness. Connect wires
to battery. Component should deploy. Repeat depl oyment procedure for remaining components.
POST-COLLISION INSPECTION
When a vehicle has been involved in a collisi on, certain components of the passive restraint s
ystem must be
WARNING:
Components are very hot after deployme nt. Personal injury may result.
Allow sufficient time for compone nts to cool before touching.
NOTE: Deploy only one component at a time.
WARNING: Components are very hot after deployme nt. Personal injury may result.
Allow sufficient time for compone nts to cool before touching.

2004 Mercedes-Benz ML350
2004 ACCESSORIES/SAFETY EQUIPMENT Merce des-Benz - Air Bag Restraint Systems
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Page 789 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual inspected or replaced. See AIR BAG/SRS COMPONENT INSPECTION & REPLACEMENT TABLES
article in the GENERAL INFORMATION section.
REMOVAL & INSTALLATION
CLOCKSPRING
Information is not available.
CONT

Page 790 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Fig. 1: Identifying Control Module
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
DRIVER-SIDE AIR BAG MODULE
Removal & Installation
1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Disable a

Page 791 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual side air bag module electrical connectors. Remove driver-side air bag module. See Fig. 2.
3. To install, reverse removal proc edure. Tighten driver-side air bag module bolts to specification. See

Page 792 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Removal & Installation (Front)
1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See
DISABLING & ACTIVATI NG AIR BAG SYSTEM
.
2. Move appropriate front seat full

Removal & Installation (Front)
1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See
DISABLING & ACTIVATI NG AIR BAG SYSTEM
.
2. Move appropriate front seat full y forward. Remove lower trim panel from outer edge of seat cushion
frame. Remove bolt from seat belt end fitting. Remove end fitting from seat cushion. Remove B-pillar
trim panel. Remove bolt from be lt height adjuster. Disconnect ET R electrical connector. Remove ETR
bolts. Remove ETR.
3. To install, reverse removal procedur e. Tighten ETR, seat belt end fitting and belt height adjuster bolts to
specification. See TORQUE SPECIFICATIONS
. Activate air bag system . Read diagnostic codes and
erase memory. See DIAGNOSTICS
.
Removal & Installation (Outer Rear)
1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See
DISABLING & ACTIVATI NG AIR BAG SYSTEM
.
2. Remove appropriate C-pillar trim panel. Remove bolt from upper seat belt guide bracket. Disconnect
ETR connector. Remove bolts from ETR. Remove ETR.
3. To install, reverse removal proc edure. Tighten ETR bolts and upper seat belt guide bracket bolt to
specification. See TORQUE SPECIFICATIONS
. Activate air bag system Read diagnostic codes and
erase memory. See DIAGNOSTICS
.
HEAD IMPACT AIR BAG MODULE (OUTER REAR)
Removal & Installation
1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See
DISABLING & ACTIVATI NG AIR BAG SYSTEM
.
2. Remove headliner. See HEADLINER
. Disconnect appropriate head im pact air bag module electrical
connector. Remove screws from rear bracket. Rem ove screws from front and center brackets. Using
Wedge (115-589-03-59-00), remove head impact air ba g module from bracket. Remove head impact air
bag module.
3. To install, reverse removal proce dure. Activate air bag system. Read diagnostic codes and erase memory.
See DIAGNOSTICS
.
HEADLINER
Removal & Installation
1. Before proceeding, see AIR BAG SAFETY PRECAUTIONS . Remove edge trim from sliding/pop-up
roof. Remove front door seals from A- and B-pillars.
2. Remove A-pillar trim panels. Remove front fold ing handle. Remove sun visors and mounting clips.
Remove upper B-pillar trim panels . Remove cargo net holding point c overs. Remove load compartment
handles.
3. Remove coat hooks. Remove C-pill ar trim panels. Remove upper screws from D-pillar trim panels.
Detach rear headliner at roof. Lower headliner until it is supported on front seats. Lower front seat backs
rearward until sufficient ac cess to head impact air ba
g modules is available.

2004 Mercedes-Benz ML350
2004 ACCESSORIES/SAFETY EQUIPMENT Merce des-Benz - Air Bag Restraint Systems
me
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