1997 MERCEDES-BENZ ML320 Complete Repair Manual

differential oil type cabin filter washer fluid heater air suspension

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MERCEDES-BENZ ML320 1997 Complete Repair Manual 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,

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MERCEDES-BENZ ML320 1997 Complete Repair Manual Disconnect passenger-side air bag module squib connector. Remove 4 passenger-side air bag module
mounting nuts.
2. To install, reverse removal proc edure. Ensure passenger-side air bag module sq

Disconnect passenger-side air bag module squib connector. Remove 4 passenger-side air bag module
mounting nuts.
2. To install, reverse removal proc edure. 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 & ACTIVATI NG AIR BAG SYSTEM
. Remove ignition key. Remove 2 central
mounting bolts for passenger-side air bag module. Li ft air bag module enough to unplug connector from
rear of module. Place module away fr om work area, with pad facing upward.
2. If necessary to replace passenger air bag instal lation frame, remove 4 frame mounting bolts. Remove
installation frame from vehicle.
3. To install air bag module or inst allation frame, reverse removal proc edure. Activate air bag system.
Perform system operation check to ensu re 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 & ACTIVATI NG AIR BAG SYSTEM
. Remove ignition key. Open glove box door.
Remove 4 clips securing glove bo x. 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 c onnector. 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 proc edure. 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 & ACTIVATI NG 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 bol ts). Unplug connector at squib of passenger-side air
bag unit. Remove mounting bo lts. Pull off and take air bag out of panel opening.
3. To install air bag module, reverse removal procedur e. 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 & ACTIVATI NG AIR BAG SYSTEM
. Remove ignition key. Remove instrument panel.
Disconnect passen
ger-side air bag module connector. Remove 4 screws and passenger-side air bag

2001 Mercedes-Benz ML320
2000-01 ACCESSORIES/SAFETY EQUIPMENT Merc edes-Benz - Air Bag Restraint Systems
me
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MERCEDES-BENZ ML320 1997 Complete Repair Manual module.
2. To install air bag module, reverse removal procedur e. Activate air bag system. Perform system operation
check to ensure system is functioning properly. See SYSTEM OPERATION CHECK

module.
2. To install air bag module, reverse removal procedur e. 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 & ACTIVATI NG 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 procedur e. 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 cont inuously. System is faulty which may result in a non deployment or
false deployment. See RETRIEVING FAULT CODES
.
SRS warning light blinks continuous ly. Control module has been replaced without setting control module
parameters.
RETRIEVING FAULT CODES
1. Check vehicle fuses. Replace any blown fuses as nece ssary. Ensure vehicle battery voltage is 11 volts or
more. Ensure SRS warning light functions. Turn i gnition 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 comp artment. It may be necessary to use Adapter (965 589
00 40 or 965 589 00 50) to connect HHT to DLC. Afte r HHT displays module number and version, press
return key to start diagnosis. Us ing HHT, follow HHT prompts to re trieve SRS fault codes. For SRS
control modules beginning with number 000, fault c ode 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 info rming technician if a test passes or fail s, or if seat belt buckle is latched or
NOTE: After component replacement, perf
orm a system operation check to ensure
proper system operation. S ee SYSTEM OPERATION CHECK
.
NOTE: Fault codes may only be retrieved us ing 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 Merc edes-Benz - Air Bag Restraint Systems
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MERCEDES-BENZ ML320 1997 Complete Repair Manual not latched. See Fig. 5 .
4. These graphic displays are disp layed as applicable by HHT during testing. See FAULT CODES table.
During diagnosis, system values are continuously updated, so by

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MERCEDES-BENZ ML320 1997 Complete Repair Manual
2001 Mercedes-Benz ML320
2000-01 ACCESSORIES/SAFETY EQUIPMENT Merc edes-Benz - Air Bag Restraint Systems
me
Saturday, October 02, 2010 3:44:45 PMPage 17 © 2006 Mitchell Repair Information Comp

Page 382 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Fig. 5: Hand Held Tester Grap hic Information (2000 Models)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
FAULT CODES
Fig. 6: Diagnostic Trouble Code (DTC) Memory (2000 Models-1 Of 4)
Courtesy of M

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MERCEDES-BENZ ML320 1997 Complete Repair Manual Fig. 7: Diagnostic Trouble Code (DTC) Memory (2000 Models-2 Of 4)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Fig. 8: Diagnostic Trouble Code (DTC) Memory (2000 Models
-3 Of 4)
Courtesy of MER

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MERCEDES-BENZ ML320 1997 Complete Repair Manual Fig. 9: Diagnostic Trouble Code (DTC) Memory (2000 Models-4 Of 4)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
CLEARING FAULT CODES
Connect Hand-Held Tester (965 589 00 01) to Data Link Connector

Fig. 9: Diagnostic Trouble Code (DTC) Memory (2000 Models-4 Of 4)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
CLEARING FAULT CODES
Connect Hand-Held Tester (965 589 00 01) to Data Link Connector (DLC). 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 displa ys module number and version, press return key to start sequence. Using HHT,
follow HHT prompts to clear SRS faul t codes. SRS codes are clear when ignition is turned on and SRS warning
light functions normally. See SYSTEM OPERATION CHECK
.
UNDERSTANDING DIAGNOSTIC CHART INFORMATION
SRS & ETR Diagnosis Chart Column Identification
First column of chart identifies TEST STEP (1.0 for example). See Fig. 10 . Second column of chart identifies
HHT fault code (017, 003 for example). First code in column is for ve hicles without side air bags. Second code
in column (when listed) is for ve hicles with side air bags only. Ot her 5 columns are self-explanatory.
Using SRS & ETR Diagnosis Chart
For reading and understanding fault code diagnosis chart, use the following example: Read test step 3.0 (first
column), HHT fault Code 002, 004 (second column). See Fig. 10
. Read TEST SCOPE-HHT ACTUAL
VALUE NO.-TEXT column (third column). Driver-side air bag squib connector R12-3 is being tested. HHT
will identify if problem is with too much resistance or not enough resistance in driver-side air bag squib circuit.
Read TEST CONDITION column (fifth column). Test ci rcuit with HHT connected to DLC, with ignition in
position "2". Read NOMINAL VALUE-HHT DISPLAY column (sixth column). HHT will display a check or
an "F". If HHT displays a check, circuit is okay. If HHT displays an "F", go to step 3.1.
Read TEST CONNECTION (NOT FOR HHT) column (fort h column). Driver-Side air bag squib connector
R12-3, terminals No. 1 and 2 are id entified. Read TEST CONDITION column. Test circuit with HHT
connected to DLC and igni tion key removed. Remove driver-side air bag module. Disconnect driver-side air
bag module squib connector R12-3. Conn ect Resistance Substitution Unit (124 589 09 63) to driver-side air bag
module squib connector (harness side). Set resistance substitution unit to 2 ohms. Turn ignition key to position
"2". Read NOMINAL VALUE-HHT DISPLAY column. If HHT displa
ys a check, replace driver-side air bag
NOTE: Refer to table to properly identify components or connectors being tested. See
COMPONENT IDENTIFICATION
table.

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 20 © 2006 Mitchell Repair Information Company, LLC.

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