Mercedes-Benz ML320. Manual — part 16

Disconnect passenger-side air bag module squib connector. Remove 4 passenger-side air bag module
mounting nuts.

2. To install, reverse removal procedure. Ensure passenger-side air bag module squib connector audibly

clicks when connecting connector. Activate air bag system. Perform system operation check to ensure
system is functioning properly. See SYSTEM OPERATION CHECK .

Removal & Installation (E Class)

1. Before proceeding, See AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See

DISABLING & ACTIVATING AIR BAG SYSTEM . Remove ignition key. Remove 2 central
mounting bolts for passenger-side air bag module. Lift air bag module enough to unplug connector from
rear of module. Place module away from work area, with pad facing upward.

2. If necessary to replace passenger air bag installation frame, remove 4 frame mounting bolts. Remove

installation frame from vehicle.

3. To install air bag module or installation frame, reverse removal procedure. Activate air bag system.

Perform system operation check to ensure system is functioning properly. See SYSTEM OPERATION
CHECK .

Removal & Installation (S Class)

1. Before proceeding, See AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See

DISABLING & ACTIVATING AIR BAG SYSTEM . Remove ignition key. Open glove box door.
Remove 4 clips securing glove box. Remove glove box compartment. When removing compartment,
disconnect glove box light. Remove glove box door lock striker.

2. Disconnect passenger-side air bag module squib connector. Remove 4 passenger-side air bag module

mounting nuts. Remove passenger-side air bag module through glove box opening. Place module away
from work area with pad facing up.

3. To install, reverse removal procedure. Ensure module squib connector audibly clicks when connecting

connector. Activate air bag system. Perform system operation check to ensure system is functioning
properly. See SYSTEM OPERATION CHECK .

Removal & Installation (SL Class)

1. Before proceeding, See AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See

DISABLING & ACTIVATING AIR BAG SYSTEM . Remove ignition key. Remove cover below
instrument panel. Remove one bolt in installation slot of center air outlet, and one bolt below right air
outlet.

2. Remove air bag panel (3 Phillips screws and 2 hex bolts). Unplug connector at squib of passenger-side air

bag unit. Remove mounting bolts. Pull off and take air bag out of panel opening.

3. To install air bag module, reverse removal procedure. Activate air bag system. Perform system operation

check to ensure system is functioning properly. See SYSTEM OPERATION CHECK .

Removal & Installation (CLK 320)

1. Before proceeding, See AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See

DISABLING & ACTIVATING AIR BAG SYSTEM . Remove ignition key. Remove instrument panel.
Disconnect passenger-side air bag module connector. Remove 4 screws and passenger-side air bag

2001 Mercedes-Benz ML320

2000-01 ACCESSORIES/SAFETY EQUIPMENT Mercedes-Benz - Air Bag Restraint Systems

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module.

2. To install air bag module, reverse removal procedure. Activate air bag system. Perform system operation

check to ensure system is functioning properly. See SYSTEM OPERATION CHECK .

Removal & Installation (SLK 320)

1. Before proceeding, See AIR BAG SAFETY PRECAUTIONS . Disable air bag system. See

DISABLING & ACTIVATING AIR BAG SYSTEM . Remove ignition key. Remove top section of
instrument panel. Fold vapor barrier toward front to reveal 2 screws. Disconnect passenger-side air bag
module connector. Remove 4 screws and passenger-side air bag module.

2. To install air bag module, reverse removal procedure. Activate air bag system. Perform system operation

check to ensure system is functioning properly. See SYSTEM OPERATION CHECK .

DIAGNOSTICS

Before proceeding, see AIR BAG SAFETY PRECAUTIONS . The SRS control module is capable of
diagnosing air bag system components and ETR components. If a fault is detected by the SRS control module
or system is malfunctioning, SRS warning light will do one or more of the following:



SRS warning light goes out after 2 minutes. System fault is noted, however occupant protection is not
affected. See RETRIEVING FAULT CODES .



SRS warning light illuminates continuously. System is faulty which may result in a non deployment or
false deployment. See RETRIEVING FAULT CODES .



SRS warning light blinks continuously. Control module has been replaced without setting control module
parameters.

RETRIEVING FAULT CODES

1. Check vehicle fuses. Replace any blown fuses as necessary. Ensure vehicle battery voltage is 11 volts or

more. Ensure SRS warning light functions. Turn ignition off. Connect Hand-Held Tester (HHT) (965 589
00 01) to Data Link Connector (DLC).

2. DLC is located in right rear corner of engine compartment. It may be necessary to use Adapter (965 589

00 40 or 965 589 00 50) to connect HHT to DLC. After HHT displays module number and version, press
return key to start diagnosis. Using HHT, follow HHT prompts to retrieve SRS fault codes. For SRS
control modules beginning with number 000, fault code 1 is valid. For SRS control modules beginning
with number 001, fault code 2 is valid. See Fig. 6 .

3. HHT will display a 3 digit fault code, and may display additional graphic information. This additional

graphic information will help in diagnosis of fault code. See Fig. 5 . During diagnosis HHT will display 4
different graphic displays informing technician if a test passes or fails, or if seat belt buckle is latched or

NOTE:

After component replacement, perform a system operation check to ensure
proper system operation. See SYSTEM OPERATION CHECK .

NOTE:

Fault codes may only be retrieved using Hand-Held Tester (965 589 00 01) and
Adapter (965 589 00 40 or 965 589 00 50).

2001 Mercedes-Benz ML320

2000-01 ACCESSORIES/SAFETY EQUIPMENT Mercedes-Benz - Air Bag Restraint Systems

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not latched. See Fig. 5 .

4. These graphic displays are displayed as applicable by HHT during testing. See FAULT CODES table.

During diagnosis, system values are continuously updated, so by moving components and connections
intermittent failures can be diagnosed. HHT will also display fault frequency and time span.

5. After retrieving fault codes using HHT, carefully observe testing instructions in this article. Some testing

is executed with HHT connected to DLC and some tests are executed with HHT removed from DLC.
Turn ignition off when removing or connecting HHT to DLC.

6. Contact Box (124 589 00 21) with Test Cable (124 589 35 63) is necessary to complete some test steps.

Resistance Substitution Unit (124 589 09 63) is necessary to substitute resistance values for testing
purposes.

2001 Mercedes-Benz ML320

2000-01 ACCESSORIES/SAFETY EQUIPMENT Mercedes-Benz - Air Bag Restraint Systems

me

2001 Mercedes-Benz ML320

2000-01 ACCESSORIES/SAFETY EQUIPMENT Mercedes-Benz - Air Bag Restraint Systems

me