1997 MERCEDES-BENZ ML350 sensor

82
Instrument cluster
Te ch n ica l
data
Instruments
and controls Operation
Driving Instrument
cluster display Practical hints Car care Index
Outside temperature indicator
The temperature sensor is located in the front bumper
area. Due to its location, the sensor can be affected by
road or engine heat during idling or slow driving. This
means that the accuracy of the displayed temperature
can only be verified by comparison to a thermometer
placed next to the sensor, not by comparison to external
displays (e.g. bank signs etc.).
Adaptation to ambient temperature takes place in steps
and depends on the prevailing driving conditions (stop-
and-go or moderate, constant driving) and amount of
temperature change. Tachometer
The tachometer displays the present engine speed in
revolutions per minute (RPM).
To help protect the engine, the fuel supply is interrupted
if the engine is operated above its specified limit.
Wa r n i n g !
The outside temperature indicator is not designed
to serve as an Ice-Warning Device and is therefore
unsuitable for that purpose. Indicated
temperatures just above the freezing point do not
guarantee that the road surface is free of ice.

95
Windshield wiper/washer
Te ch n ica l
data
Instruments
and controls Operation
Driving Instrument
cluster display Practical hints Car care Index
Windshield wiper/washer switch
Move stalk briefly up for single wipe without adding
washer fluid (use only when windshield is wet).
Pull stalk toward steering wheel and hold to activate
wiper and washer.
Wiper off Move stalk down for:
Intermittent wiping
(Interval is vehicle speed dependent
1.
Optional rain sensor: One initial wipe, pauses
between wipes are automatically controlled by a
rain sensor monitoring wetness of windshield.)
Notes:
With vehicle at a standstill, a front door open and
the key in steering lock position 2 there will be no
operation of windshield wipers in intermittent
setting.
Optional rain sensor:
Do not leave in intermittent setting when vehicle
is taken to an automatic car wash or when
cleaning the windshield. Wipers will operate in
presence of water spray at windshield, and wipers
may be damaged as a result.
Move stalk up for: Normal wiper speed
Fast wiper speed
1 At speeds of approximately 105 mph (170 km/h) the wiper switches automatically to continuous wiping.

160
Catalytic converter
Te ch n ica l
data
Instruments
and controls Operation
Driving Instrument
cluster display Practical hints Car care Index
Catalytic converter
Your Mercedes-Benz is equipped with monolithic type
catalytic converters, an important element in
conjunction with the oxygen sensors to achieve
substantial control of the pollutants in the exhaust
emissions. Keep your vehicle in proper operating
condition by following our recommended maintenance
instructions as outlined in your Service Booklet. Caution!
To prevent damage to the catalytic converters, use only
premium unleaded gasoline in this vehicle.
Any noticeable irregularities in engine operation should
be repaired promptly. Otherwise, excessive unburned
fuel may reach the catalytic converter causing it to
overheat, which could start a fire.
Wa r n i n g !
As with any vehicle, do not idle, park or operate
this vehicle in areas where combustible materials
such as grass, hay or leaves can come into contact
with the hot exhaust system, as these materials
could be ignited and cause a vehicle fire.

304
Index
Te ch n ica l
data
Instruments
and controls Operation Driving
Instrument
cluster display Practical hints Car care
Index
FFirst aid kit .....................................................................228
Flexible service system (FSS) ........................................ 87
FSS indicator lamp ............................................ 79, 225
Floor plates Removable .................................................................. 129
Fog lamp switch ........................................................ 92, 93
Four ETS LOW RANGE – 4-ETS+ .............................................204
Malfunction indicator lamp ..................................... 221
Four wheel electronic traction system (4-ETS+) .......203 Malfunction indicator lamp ..................................... 221
Fuel Gasoline additives ....................................................296
Premium unleaded gasoline ................. 213, 293, 295
Fuel filler flap Manual release .......................................................... 274
Fuel requirements .........................................................295
Fuel reserve warning ....................................................220
Fuels, coolants, lubricants etc. - Capacities ..............292
Fuses, electrical .............................................................228
GGarage door opener .......................................................140
Gasoline
Additives .................................................................... 296
Fuel requirements ................................................... 295
Premium unleaded .................................................. 295
General notes on the central locking system .............. 26
Glass breakage sensor .................................................... 36
Glove box ......................................................................... 115HHazard warning flasher switch ..................................... 94
Head restraints Adjusting ......................................................................43
Front .............................................................................. 43
Front, removal ............................................................. 43
Rear .............................................................................124
Removal ............................................................... 43, 125
Headlamp aim, adjusting ............................................. 268
Headlamp assembly Halogen ....................................................................... 261
Xenon ......................................................................... 262

307
Index
Te ch n ica l
data
Instruments
and controls Operation Driving
Instrument
cluster display Practical hints Car care
Index
OObtaining replacement keys .......................................... 25
Odometer/Trip odometer ................................................ 80
Off-Road driving ............................................................. 183
On-board diagnostic system ......................................... 218
Operator’s manual ............................................................. 8
Outside temperature indicator ...................................... 82
Overhead control panel ................................................... 21PPanic button ...................................................................... 28
Parking .............................................................................176
Parking brake ....................... 118, 173, 175, 176, 219, 245
Partition net .................................................................... 133
Poly-V-belt Layout .........................................................................286
Power assistance ............................................................ 175
Power seats, front ............................................................ 40 Memory ........................................................................ 42
Memory recalling ....................................................... 42
Memory storing ........................................................... 42 Power windows ...............................................................104
Blocking of rear door windows ............................... 105
Express opening of front door windows ................ 105
Problems with your vehicle ............................................ 15
Product information .......................................................... 7
RRadio transmitters ......................................................... 146
Rain sensor See windshield wiper/washer switch ......................95
Rear quarter windows ...................................................106
Rear seat bench ..............................................................120 Easy entry/exit feature ............................................123
Head restraints ..........................................................124
Rear seat head restraints ..............................................124 Adjusting ....................................................................125
Removal ......................................................................125
Rear view mirrors Exterior ......................................................................... 73
Inside ............................................................................ 71
Rear window defroster .................................................. 103
Rear window wiper/washer ...........................................96

2003 ACCESSORIES/SAFETY EQUIPMENT
Mercedes-Benz - Air Bag Restraint Systems
DESCRIPTION & OPERATION
All models are equipped with Supplemental Restraint System (SRS). The main components of SRS are driver-
side air bag module, passenger-side air bag module, side impact air bag modules (located in doors), SRS control
module, side air bag sensors, SRS warning light, driver-side knee bolster, passenger-side knee bolster and seat
belt pretensioners or Emergency Tensioning Retractor (ETR) seat belt assembly. Additionally, some vehicles
may be equipped with head impact (curtain type) air bags.
Both SRS and ETR are electronically activated by a single control module. There are 2 thresholds which must
be exceeded to trigger an ETR action, air bag deployment, or both. If a moderately severe frontal collision
occurs exceeding first triggering threshold where protection from seat belt is sufficient, only Emergency
Tensioning Retractor (ETR) is activated if seat belt is buckled. If a moderately severe frontal collision occurs
exceeding first triggering threshold where protection from seat belt is sufficient, but seat belt is not buckled, air
bag is deployed and ETR is not activated.
If a severe frontal collision occurs exceeding second triggering threshold where protection from seat belt is
insufficient, air bag is deployed. ETR is activated if seat belt is buckled. If seat belt is not buckled, ETR is not
activated when second triggering threshold is reached. Passenger air bag will deploy even if passenger seat is
not occupied when a triggering threshold is exceeded. During certain types of collisions, the air bags will be
deploy, but ETRs will not be activated.
The side air bag on the driver-side deploys whenever the driver-side air bag module is deployed and when there
is a substantial side impact crash. The air bag on the passenger-side will activate only when a sensor (Occupied
Seat Recognition Sensor) in the passenger seat sends a signal to the SRS control module that the passenger-side
seat is occupied. Side air bags mounted in rear doors will deploy when side impacts occur that exceed preset
parameters.
Head impact air bag modules will deploy when certain side impacts occur that exceed preset parameters. Head
impact air bag will deploy independently of other air bags on side of impact.
COMPONENT LOCATIONS
COMPONENT LOCATIONS WARNING:Accidental air bag deployment is possible. Personal injury may result.
Read and follow all WARNINGS and AIR BAG SAFETY PRECAUTIONS

before working on air 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-side lower B- & C-pillars(1)

2003 Mercedes-Benz ML320
2003 ACCESSORIES/SAFETY EQUIPMENT Mercedes-Benz - Air Bag Restraint Systems

2003 Mercedes-Benz ML320
2003 ACCESSORIES/SAFETY EQUIPMENT Mercedes-Benz - Air Bag Restraint Systems
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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 date or 10 years from SRS replacement date after accident related repairs are
completed.
SYSTEM OPERATION CHECK
SRS warning light indicates SRS and Emergency Tensioning Retractor (ETR) system readiness. Turn ignition
on. SRS warning light will illuminate, then turn off after approximately 4-6 seconds indicating SRS system is
functioning properly. If SRS warning light does not illuminate, illuminates while driving or is continuously
illuminated, there is a system fault. Repair malfunctioning system.
AIR BAG SAFETY PRECAUTIONS
Observe these precautions when servicing the air bag system:
When working around SRS components and before any repairs are performed, disable air bag system. See
DISABLING & ACTIVATING 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 handling a deployed air bag module. Air bag module may
contain sodium hydroxide deposits which are irritating to the skin.
Always use control module and impact sensors made by same manufacturer. Using components produced
by different manufacturers could cause accidental 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 trim cover facing away from your body.
Always place air bag module on workbench with trim cover up, away from loose objects.
Front Passenger Seat Occupied Recognition With
Automatic Child Seat Recognition (ACSR) sensorUnder passenger front seat cushion
Head impact air bag modulesDriver-side & passenger-side roof rails over front &
rear doors
Knee bolstersDriver-side and passenger-side lower instrument
panel
Passenger-side air bag modulePassenger-side instrument panel
Side impact air bag modulesIn front & rear doors
Side impact sensorsOn floor inboard of door openings
(1)On C Class, rear seat ETRs are part of seat belt buckle assemblies.

2003 Mercedes-Benz ML320
2003 ACCESSORIES/SAFETY EQUIPMENT Mercedes-Benz - Air Bag Restraint Systems
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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
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