engine MERCEDES-BENZ ML320 1997 Complete Repair Manual

294 Fuels, coolants, lubricants etc.
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Engine oils
Engine oils are specifically tested for their suitability in
our engines. Therefore, use only engine oils
recommended by Mercedes-Benz. Information on
recommended brands is available at your authorized
Mercedes-Benz Light Truck Center.
Please follow Service Booklet recommendations for
scheduled oil changes. Failure to do so could result in
engine damage not covered by the Mercedes-Benz
Limited Warranty.
Engine oil additives
Do not blend oil additives with engine oil. They may be
harmful to the engine operation.
Damage or malfunctions resulting from blending oil
additives are not covered by the Mercedes-Benz Limited
War ra nt y.Air conditioner refrigerant
R-134a (HFC) refrigerant and special PAG lubricating oil
is used in the air conditioner system.
Never use R-12 (CFC) or mineral-based lubricating oil,
otherwise damage to the system will occur.
Brake fluid
During vehicle operation, the boiling point of the brake
fluid is continuously reduced through the absorption of
moisture from the atmosphere. Under extremely hard
operating conditions, this moisture content can lead to
the formation of bubbles in the system thus reducing
the system’s efficiency.
The brake fluid must therefore be replaced every two
years, preferably in the spring.
It is recommended to use only brake fluid approved by
Mercedes-Benz. Your authorized Mercedes-Benz Light
Truck Center will provide you with additional
information.

295 Fuels, coolants, lubricants etc.
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cluster displayPractical hints Car care Index Premium unleaded gasoline
Caution!
To maintain the engine’s durability and performance,
premium unleaded gasoline must be used. If premium
unleaded is not available and low octane fuel is used,
follow these precautions:
•have the fuel tank filled only partially with unleaded
regular and fill up with premium unleaded as soon
as possible,
•avoid full throttle driving and abrupt acceleration,
•do not exceed an engine speed of 3000 rpm, if the
vehicle is loaded with a light load such as two
persons and no luggage,
•do not exceed 2 / 3 of maximum accelerator pedal
position, if the vehicle is fully loaded or operating in
mountainous terrain.Fuel requirements
Use only Premium unleaded meeting ASTM
standard D 439:
The octane number (posted at the pump) must be
91 min. It is an average of both the Research (R) octane
number and the Motor (M) octane number: [(R+M) / 2].
This is also known as ANTI-KNOCK INDEX.
Unleaded gasoline containing oxygenates such as
Ethanol, IPA, IBA and TBA can be used provided the
ratio of any one of these oxygenates to gasoline does not
exceed 10%, MTBE not to exceed 15%.
The ratio of Methanol to gasoline must not exceed 3%
plus additional cosolvents.
Using mixtures of Ethanol and Methanol is not allowed.
Gasohol, which contains 10% Ethanol and 90% unleaded
gasoline, can be used.
These blends must also meet all other fuel requirements
such as resistance to spark knock, boiling range, vapor
pressure etc..

296 Fuels, coolants, lubricants etc.
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Gasoline additives
A major concern among engine manufacturers is carbon
build up caused by gasoline. Mercedes-Benz
recommends the use of only quality gasoline containing
additives that prevent the build up of carbon deposits.
After an extended period of using fuels without such
additives, carbon deposits can build up especially on the
intake valves and in the combustion area, leading to
engine performance problems such as:
•warm-up hesitation,
•unstable idle,
•knocking / pinging,
•misfire,
•power loss.
Do not blend other specific fuel additives with fuel.
They only result in unnecessary cost, and may be
harmful to the engine operation.
Damage or malfunctions resulting from poor fuel
quality or from blending specific fuel additives are not
covered by the Mercedes-Benz Limited Warranty.Coolants
The engine coolant is a mixture of water and
anticorrosion / antifreeze, which provides:
•corrosion protection,
•freeze protection,
•boiling protection (by increasing the boiling point).
The cooling system was filled at the factory with a
coolant providing freeze protection to approximately
-35°F (-37°C) and corrosion protection.
If the antifreeze mixture is effective to -22°F (-30°C), the
boiling point of the coolant in the pressurized cooling
system is reached at approx. 266°F (130°C).
The coolant solution must be used year round to provide
the necessary corrosion protection and increase in the
boil-over protection. You should have it replaced every
3years.
To provide the important corrosion protection, the
solution must be at least 45% anticorrosion / antifreeze
(equals a freeze protection to approx. - 22°F [-30°C]). If
you use a solution that is more than 55% anticorrosion/
antifreeze (freeze protection to approx. - 49°F [-45°C])-,

297 Fuels, coolants, lubricants etc.
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cluster displayPractical hints Car care Index the engine temperature will increase due to the lower
heat transfer capability of the solution. Therefore, do not
use more than this amount of anticorrosion / antifreeze.
If the coolant level is low, water and MB anticorrosion/
antifreeze should be used to bring it up to the proper
level (have cooling system checked for signs of leakage).
The water in the cooling system must meet minimum
requirements, which are usually satisfied by normal
drinking water. If your are not sure about the water
quality, consult your authorized Mercedes-Benz Light
Truck Center.
Anticorrosion/antifreeze
Your vehicle contains a number of aluminum parts. The
use of aluminum components in motor vehicle engines
necessitates that anticorrosion / antifreeze coolant used
in such engines be specifically formulated to protect the
aluminum parts. (Failure to use such anticorrosion/
antifreeze coolant will result in a significantly
shortened service life.)
Therefore the following product is strongly
recommended for use in your vehicle: Mercedes-Benz
Anticorrosion / antifreeze agent.Before the start of the winter season (or once a year in
the hot southern regions), you should have the
anticorrosion / antifreeze concentration checked. The
coolant is also regularly checked each time you bring
your vehicle to your authorized Mercedes-Benz Light
Truck Center for service.
Anticorrosion / antifreeze quantity
Approx. freeze protection
– 35°F
(– 37°C)– 49°F
(– 45°C)
6.4 US qt
(6.0 l)7. 0 U S q t
(6.6 l)

301 Index
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cluster displayPractical hints Car careIndex Brake fluid ............................................................. 175, 294
Brake warning lamp ................................................. 219
Capacity ......................................................................293
Brake pad wear indicator .............................................225
Brake warning lamp ...................................................... 219
Brake fluid low .......................................................... 219
Brakes ....................................................173, 175, 293, 294
CCapacities
Fuels, coolants, lubricants etc. ...............................292
Cargo area ....................................................................... 131
Hooks .......................................................................... 133
Loading instructions ................................................ 136
Cargo area cover blind .................................................. 137
Cargo compartment lamp .............................................. 111
Cargo floor plates
Removable .................................................................. 129
Storage ........................................................................ 130
Cargo tie-down rings ..................................................... 132
Catalytic converter ........................................................ 160
Cellular telephone ......................................................... 139
Center console .................................................................. 20
Central locking switch .................................................... 32Central locking system .................................................... 26
Automatic central locking .........................................32
Locking and unlocking ............................................... 27
Mechanical keys ..........................................................29
Panic button .................................................................28
Remote control ............................................................26
Unlocking the liftgate ................................................. 28
Vehicle keys .................................................................24
Changing wheels ........................................................... 245
Inflating the space-saver tire ................................. 249
Charge indicator lamp .................................................. 223
CHECK ENGINE malfunction indicator lamp ............ 218
Check regularly and before a long trip ....................... 215
Checking engine oil level
Via engine oil level indicator ....................................89
Via oil dipstick .......................................................... 233
Child restraint ..............................................38, 46, 53, 65
Cleaning and care of the vehicle ................................ 278
Climate control .................................................................98
Air recirculation ........................................................102
Basic setting ...............................................................100
Defogging windows ................................................... 101
Defrosting windshield .............................................. 101
Dust filter ...................................................................102
Rear window defroster ............................................. 103
Special settings ......................................................... 101

302 Index
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cluster displayPractical hints Car careIndex
Clock, adjusting ............................................................... 80
Compartment under front passenger seat ..................116
Consumer information ..................................................298
Control and operation of radio transmitters ............. 146
Coolant level
Adding ........................................................................235
Checking ....................................................................234
Low engine coolant level warning ..........................224
Coolant temperature gauge ............................................ 81
Coolants ...........................................................................296
Anticorrosion/antifreeze quantity .........................296
Low engine coolant level warning ..........................224
Cover blind, cargo area ................................................. 137
Cruise control ................................................................. 196
Cup holder
Instrument panel .......................................................116
Rear center console ...................................................117
DDaytime running lamps .................................................. 91
Deep water
Driving instructions ................................................. 181
Defroster, rear window .................................................. 103
Display illumination ........................................................ 80Doors .................................................................................. 30
Drinking and driving ..................................................... 174
Drive sensibly - save fuel .............................................. 174
Driving instructions ...................................................... 174
Driving off ....................................................................... 176
EEBP (Electronic brake proportioning) ........................ 204
Electrical outlet ............................................................. 230
Electronic brake proportioning (EBP) ........................ 204
Electronic stability program (ESP) ............................. 205
Control switch .......................................................... 207
Malfunction indicator lamp .....................................221
Synchronizing .......................................................... 206
Warning lamp ............................................................221
Electronic traction system (4-ETS+) ........................... 203
LOW RANGE – 4-ETS ............................................... 204
Malfunction indicator lamp .....................................221
Emergency call
See Tele Aid ...............................................................148
Emergency operation of Skyview Top ....................... 273
Emergency tensioning retractor (ETR) .........................55
Emergency unlocking in case of accident ...................33
Emission control ............................................................ 161

303 Index
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cluster displayPractical hints Car careIndex Emission control label ..................................................285
Engine compartment ..................................................... 231
Engine malfunction
CHECK ENGINE malfunction indicator lamp ....... 218
Engine oil additives .......................................................294
Engine oil consumption ................................................234
Engine oil level
Checking ............................................................. 89, 233
Warning ......................................................................224
Engine oil level indicator ................................................ 89
Engine oils ......................................................................294
Capacities ...................................................................292
Low engine oil level warning ..................................224
Engine overheating ......................................................... 81
Engine speed limit
Overrevving ................................................................. 82
Enlarged cargo area ....................................................... 131
Entrance lamps ...............................................................112
ESP
LOW RANGE — ESP ..................................................208
ESP (Electronic stability program) ..............................205
Control switch ...........................................................207
Malfunction indicator lamp ..................................... 221
Synchronizing ...........................................................206
Warning lamp ............................................................ 221ETR (Emergency tensioning retractor) .........................55
ETS (4-ETS+) .................................................................. 203
LOW RANGE – 4-ETS+ ............................................ 204
Exterior lamp switch .......................................................90
Exterior lamps ............................................................... 260
Adjusting headlamp aim ......................................... 268
Auxiliary fog lamp ............................................. 92, 264
Fog lamps .....................................................................93
Headlamp assembly ......................................... 261, 262
Headlamps .................................90, 261, 262, 268, 280
High mounted stop lamp ......................................... 267
License plate lamps ................................................. 267
Low and high beam ............................................90, 263
Parking lamp ...................................................... 90, 264
Replacing bulbs ........................................................ 260
Side marker lamp ..................................................... 264
Standing lamp .....................................................90, 264
Taillamp assemblies ................................................ 265
Turn signal lamp ................................................90, 264
Turn signal lamp, side ............................................. 266
Exterior rear view mirrors ..............................................73
Electrically folding ...................................................... 75

306 Index
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cluster displayPractical hints Car careIndex
Parking lamp ...................................................... 90, 264
Replacing bulbs .........................................................260
Side marker lamp ......................................................264
Standing lamp .................................................... 90, 264
Taillamp assemblies .................................................265
Turn signal lamp ................................................ 90, 264
Turn signal lamp, side .............................................266
Layout of poly-V-belt ......................................................286
Liftgate ............................................................................... 34
Unlocking ..................................................................... 28
Lighter ..............................................................................119
Limp home mode (Automatic transmission) ............. 172
Loading instructions ..................................................... 136
Lockable storage compartment .....................................116
Locking and unlocking the vehicle ............................... 27
Low engine coolant level warning ..............................224
Low engine oil level warning .......................................224
LOW RANGE
Indicator lamp ........................................................... 221
LOW RANGE mode ........................................................209
LOW RANGE – 4-ETS+ .............................................204
LOW RANGE – ABS ..................................................202
LOW RANGE – ESP ...................................................208
MMaintenance ...................................................................147
Malfunction and indicator lamps in the instrument
cluster ......................................................................... 218
Manual locking/unlocking the doors ...........................29
Manual operation of Skyview Top .............................. 273
Manual operation of sliding/pop-up roof .................. 272
Manual seat, front ............................................................39
MCS, radio and telephone ............................................146
Mechanical keys ............................................................... 29
Memory .............................................................................42
Recalling ....................................................................... 42
Storing ........................................................................... 42
Mirror, exterior, adjusting ..............................................73
Mirror, exterior, rear view ..............................................73
Mirror, inside, rear view ................................................. 71
Mirrors, vanity ................................................................ 113

309 Index
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data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car careIndex Special settings (Climate control) ............................... 101
Split rear seat bench ..................................................... 120
Easy entry/exit feature ............................................ 123
Rear seat head restraints ......................................... 124
SRS indicator lamp ........................................................ 219
SRS malfunction .............................................................. 57
Start lock-out .................................................................... 25
Starting and turning off the engine ............................ 164
Steering lock ................................................................... 162
Steering wheel
Adjustable .................................................................... 70
Indicator lamp ...........................................................222
Stop lamp, high mounted .............................................267
Storage compartments
Center console ............................................................115
Compartment under front passenger seat .............116
Glove box .....................................................................115
Stowing things in the vehicle ......................................230
Stranded vehicle ............................................................259
Sun visors ........................................................................113
Supplemental restraint system (SRS) ........................... 54
Synchronizing remote control ..................................... 271
TTachometer ........................................................................82
Technical data ................................................................ 287
Electrical system ...................................................... 290
Main dimensions ...................................................... 291
Rims and tires ..................................................288, 289
Weights ...................................................................... 290
Tele Aid ............................................................................ 148
Emergency calls ........................................................149
Information ................................................................ 154
Initiating an emergency call manually .................. 151
Roadside Assistance ................................................. 152
Telephone, general ......................................................... 139
Telephones and two-way radios ................................... 146
Telescoping steering column
Adjusting ......................................................................70
Indicator lamp .......................................................... 222
The first 1 000 miles (1 500 km) ................................147
Third row seats ...............................................................126
Tie-down rings, cargo .................................................... 132
Tire inflation pressure ................................................. 250
Tire traction ....................................................................178

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
me
Saturday, October 02, 2010 3:44:45 PMPage 15 © 2006 Mitchell Repair Information Company, LLC.