set clock MERCEDES-BENZ ML320 1997 Complete Repair Manual

UNDEPLOYED AIR BAG/ETR
After deploying procedures and/or diagnostic testing have confirmed air bag module and/or ETR is
undeployable, contact vehicle manufacturer for proper disposal instructions.
REMOVAL & INSTALLATION
CLOCKSPRING ASSEMBLY
Removal & Installation
1. Before proceeding, see SERVICE PRECAUTIONS . Disable air bag system. See DISABLING &
ACTIVATING AIR BAG SYSTEM .
2. Remove driver air bag module. See DRIVER
-SIDE AIR BAG MODULE . Remove steering wheel bolt.
Using a puller, remove steering wheel. Disconnect lower clockspring connector. Turn 2 fixing screws
(locating on clockspring) counterclockwise until clockspring cannot be rotated. Remove clockspring
mounting screws as necessary. Disconnect all necessary electrical connectors. Remove clockspring
assembly. To install, reverse removal procedure. Activate air bag system. See DISABLING &
ACTIVATING AIR BAG SYSTEM . Perform system operation check to ensure system is functioning
properly. See SYSTEM OPERATION CHECK
.
CONTROL UNIT
Removal & Installation (C Class)
1. Before proceeding, see SERVICE PRECAUTIONS . Disable air bag system. See DISABLING &
ACTIVATING AIR BAG SYSTEM . Remove ignition key. Remove shift lever cover bezel. Lift shift
lever cover enough to disconnect electrical connector. Remove shift lever cover.
2. Remove storage compartment mounting screws from center console. Remove storage compartment.
Remove ashtray. Disconnect electrical connectors as necessary. Disconnect control module electrical
connector. Remove control module mounting bolts. Remove control module.
3. To install, reverse removal procedure. Ensure control module arrow points to front of vehicle. Set
parameters and program new control module with Hand-Held Tester (965 589 00 01 00). 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 SERVICE PRECAUTIONS . Disable air bag system. See DISABLING &
ACTIVATING AIR BAG SYSTEM . Remove ignition key. Remove gear shift cover panel. Remove
ashtray and ashtray housing at front of console. Remove radio (if necessary).
2. Remove center console right side cover screws and right side cover. Disconnect electrical connector for
control unit. Remove 2 control unit mounting screws. Remove control unit. WARNING:Failure to follow service precautions may result in air bag deployment and
personal injury. See SERVICE PRECAUTIONS
. After component
replacement, check system operation. See SYSTEM OPERATION CHECK
.

1998 Mercedes-Benz ML320
AIR BAG RESTRAINT SYSTEM 1998 AIR BAG RESTRAINT SYSTEMS Mercedes-Benz
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If any part of SRS wiring harness is damaged, DO NOT repair wiring harness, replace complete wiring harness.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS
(1)
DIAGNOSIS & TESTING
Before proceeding, see SERVICE PRECAUTIONS
. The control module is capable of diagnosing airbag
system components and ETR components. If a fault is detected by the 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.
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. 6
. 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
not latched. See Fig. 6
.
4. These
graphic displays are displayed as applicable by HHT during testing. See FAULT CODES table.
ApplicationFt. Lbs. (N.m)
Steering Wheel Hub Bolt52-66 (70-90)
INCH Lbs. (N.m)
Driver Air Bag Module Bolts (Torx)44-62 (5-7)
(1)Torque specifications are not available for clockspring assembly, control module or passenger-side
air bag module.
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).

1998 Mercedes-Benz ML320
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with HHT connected to DLC and ignition key removed. Remove driver-side air bag module. Disconnect
driver-side air bag module squib connector R12/3. Connect 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 displays a
check, replace driver-side air bag 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 Resistance Substitution Unit (124 589 09 63 00) to horn/air bag
clockspring connector A45x1. Set resistance substitution unit to 2 ohms. Read NOMINAL VALUE/HHT
DISPLAY column. If HHT displays a check, check horn/air bag clockspring for continuity. Replace
horn/air bag clockspring as necessary. If HHT displays an "F", go to step 3.4.
MODEL IDENTIFICATION
COMPONENT IDENTIFICATION
DIAGNOSTIC TESTS NOTE: Some testing is identified by model number. To identify models by model
number see MODEL IDENTIFICATION
table.
Model NumberModel
129SL Class
140S Class
170SLK 230
202C Class
208CLK 320
210E Class
ComponentManufacturer's Designation
A45Horn/Air Bag Clockspring
A53Driver-Side Air Bag Sensor
A54Passenger-Side Air Bag Sensor
B41/1Passenger-Side Seat Occupied Recognition Sensor
N2/2Control Module
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 (Passenger-Side) Squib Connector
S68/3Driver-Side Belt Buckle Switch
S68/4Passenger-Side Belt Buckle Switch
W26Control Module Ground
X11/4Data Link Connector

1998 Mercedes-Benz ML320
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77 Instrument cluster
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index 1Coolant temperature gauge, see page 81
2Outside temperature indicator (optional), see
page 82
3Fuel gauge with reserve and fuel cap placement
warning lamp, see page 220
4Left turn signal indicator lamp, see exterior lamp
switch, page 90
5Knob for odometer / trip odometer readout / reset,
FSS indicator, and intensity of instrument lamps,
see page 80
64-ETS+ and ESP warning lamp, see page 221
For 4-ETS+ (four wheel electronic traction system),
see page 203;
for ESP (electronic stability program), see page 205.7Speedometer
8Selectable:
Trip odometer, see page 80
Main odometer, see page 80
FSS display, see page 87
Engine oil level indicator, see page 89
9Right turn signal indicator lamp, see exterior lamp
switch, page 90
10Knob for setting clock, see page 80
11Tachometer, see page 82
12Gear range indicator display, see selector lever
positions, page 168
13Clock, see page 80

80 Instrument cluster
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Activating instrument cluster display
The display for temperature, odometer, oil level
indicator and clock is activated by:
•Opening the driver’s door.
•Pressing button (1) in the instrument cluster (with
key removed or in steering lock position 0).
•Turning the key in steering lock to position 1 or 2.Display illumination
Rotate knob (1) to vary intensity of instrument lamps:
•Clockwise - instrument lamp intensity increases.
•Counterclockwise - instrument lamp intensity
decreases.
Odometer/trip odometer
Activate the instrument cluster.
•Press knob (1) once to switch to or from odometer to
trip odometer readout.
•Press and hold knob (1) for more than 1 second to
reset trip odometer (with trip odometer displayed).
•Press knob (1) twice to display next scheduled
service.
Clock
Adjusting clock (instrument cluster activated):
Minute: Pull out knob (2) and turn it to the right.
Hour: Pull out knob (2) and turn it to the left.

252 Battery
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
Therefore, we strongly recommend that you have the
battery charge checked frequently, and corrected if
necessary, especially if you use the vehicle less than
approximately 200 miles (300 km) per month,
mostly for short distance trips, or if it is not used for
long periods of time.
Only charge a battery with a battery charger after the
battery has been disconnected from the vehicle’s
electrical circuit.
Always disconnect the battery negative lead first and
connect last.
When removing and connecting the battery, always
make sure that all electrical consumers are off and the
key is in steering lock position 0. The battery must
always be securely installed when the vehicle is in
operation. During removal and installation always
protect the disconnected battery positive (+) terminal
with the cover attached to the battery.
While the engine is running the battery terminal clamps
must not be loosened or detached, otherwise the
generator and other electronic components would be
damaged.Note:
After reconnecting the battery also set the clock in
instrument cluster (see page 80), set date in trip
computer (see page 83), resynchronize the sliding / pop-
up roof (see page 272), the Skyview Top (see page 273)
and the electronic stability program (ESP) (see
page 206).
Battery recycling
Batteries contain material that can harm the
environment with improper disposal.
Large 12 Volt storage batteries contain lead.
Recycling of batteries is the preferred method of
disposal.
Many states require sellers of batteries to accept old
batteries for recycling.

266 Exterior lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
Pull off electrical connector (2).
Squeeze tabs (3) together and remove bulb holder.
Push bulb into socket, turn counterclockwise and
remove.
Insert new bulb in socket, push in and twist clockwise.
Reinstall bulb holder.
Reinstall electrical connector (2).
Reinstall taillamp.Turn signal lamp, side (168 [3 cp bulb])
Carefully slide lamp slightly towards rear (arrow), lift
away its front end first, then remove lamp from panel.
Twist bulb socket counterclockwise and pull out. Pull
bulb out of socket.
Insert new bulb in socket. Reinstall bulb socket.
To reinstall lamp, set rear end of lamp into panel and let
front end snap into place.

272 Emergency operation of sliding/pop-up roof
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
Emergency operation of sliding/pop-up roof
The sliding / pop-up roof can be opened or closed
manually should an electrical malfunction occur.
The sliding / pop-up roof drive is located behind the
cover between the front interior lamps.
1. Open cover by using a f lat blade screw driver at top
edge.
2. Obtain crank (supplied with vehicle) and insert in
hexagon drive hole, located at rear end of the open
cover.Note:
Push crank upward while turning it, to disengage the
electric motor.
To slide the roof closed or to raise the roof at the rear:
turn crank clockwise.
To slide the roof open or to lower the roof at the rear:
turn crank counterclockwise.
Important!
After manually operating the sliding / pop-up roof, a
timing synchronization is needed for future electrical
operation of the roof. To do so, remove fuse for sliding/
pop-up roof operation, located in fuse box, for one
second and reinstall. Now push and hold switch until
the sliding / pop-up roof is fully raised. Continue to hold
switch for another second.
RESETMODEMODE

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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77
Instrument cluster
Te ch n ica l
data
Instruments
and controls Operation
Driving Instrument
cluster display Practical hints Car care Index
1
Coolant temperature gauge, see page 81
2 Outside temperature indicator (optional), see
page 82
3 Fuel gauge with reserve and fuel cap placement
warning lamp, see page 220
4 Left turn signal indicator lamp, see exterior lamp
switch, page 90
5 Knob for odometer / trip odometer readout / reset,
FSS indicator, and intensity of instrument lamps,
see page 80
6 4-ETS+ and ESP warning lamp, see page 221
For 4-ETS+ (four wheel electronic traction system),
see page 203;
for ESP (electronic stability program), see page 205. 7
Speedometer
8 Selectable:
Trip odometer, see page 80
Main odometer, see page 80
FSS display, see page 87
Engine oil level indicator, see page 89
9 Right turn signal indicator lamp, see exterior lamp
switch, page 90
10 Knob for setting clock, see page 80
11 Tachometer, see page 82
12 Gear range indicator display, see selector lever
positions, page 168
13 Clock, see page 80