air condition MERCEDES-BENZ ML320 1997 Complete Workshop Manual

283
Contents - Technical data
Te ch n ica l
data
Instruments
and controls Operation Driving
Instrument
cluster display Practical hints Car care Index
Technical dataSpare parts service ........................284
Warranty coverage .........................284
Identification labels .......................285
Layout of poly-V-belt drive ............286
Technical data ................................287
Fuels, coolants, lubricants etc. – capacities .........................292 Engine oils ...................................... 294
Engine oil additives ...................... 294
Air conditioner refrigerant .......... 294
Brake fluid ...................................... 294
Premium unleaded gasoline ........ 295
Fuel requirements ........................ 295
Gasoline additives ......................... 296
Coolants .......................................... 296
Consumer information ................. 298

286
Technical data
Te ch n ica l
data
Instruments
and controls Operation Driving
Instrument
cluster display Practical hints Car care Index
Layout of poly-V-belt drive 1 Automatic belt tensioner
2 Crankshaft
3 Air conditioner compressor
4 Coolant pump
5 Generator (alternator)
6 Idler pulley
7 Power steering pump
For dimensions of the poly-V-belt, see technical data.

293
Fuels, coolants, lubricants etc. - capacities
Te ch n ica l
data
Instruments
and controls Operation Driving
Instrument
cluster display Practical hints Car care Index
Brake system
(MB Brake fluid [DOT 4+]) approx. 0.9 US qt (0.8 l)
Windshield / headlamp washer system
(MB Windshield washer concentrate “S”
1) Vehicles without
headlamp cleaning
system
Vehicles with headlamp
cleaning system approx. 5.5 US qt (5.0 l)
approx. 8.0 US qt (7.6 l)
Cooling system
(MB Anticorrosion / antifreeze) approx. 12.7 US qt (12.0 l)
Fuel tank
including a reserve of
(Premium unleaded gasoline:
Posted Octane 91 (Avg. of 96 RON / 86 MON)) ML 320 / ML 430
ML 55 AMG approx. 19.2 US gal (73.0 l)
approx. 3.2 US gal (12.0 l)
approx. 24.5 US gal (93.0 l)
approx. 3.2 US gal (12.0 l)
Air conditioner system
(R-134a refrigerant and special
PA C l u b r i c a n t (Never R-12))
1 Use MB Windshield Washer Concentrate “S” and water for temperatures above freezing or MB Windshield Washer Concentrate “S” and
commercially available premixed windshield washer solvent / antifreeze for temperatures below freezing. Follow suggested mixing r atios, see
page 237.Fuels, coolants, lubricants etc. Model Capacity

294
Fuels, coolants, lubricants etc.
Te ch n ica l
data
Instruments
and controls Operation Driving
Instrument
cluster display Practical hints Car care Index
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.

300
Index
Te ch n ica l
data
Instruments
and controls Operation Driving
Instrument
cluster display Practical hints Car care
Index
Index
AABS (Antilock brake system) ....................................... 201 LOW RANGE – ABS ..................................................202
Malfunction indicator lamp .....................................222
Adjustable steering wheel .............................................. 70 Indicator lamp ...........................................................222
Adjusting headlamp aim ...............................................268
Air conditioner refrigerant ...........................................294
Air pump .........................................................................239
Air recirculation ............................................................ 102
Airbag deactivation system ............................................ 53
Airbag OFF indicator lamp ...........................................222
Airbags .............................................................................. 56
Alarm system ............................................................. 35, 36
Anticorrosion/antifreeze .................... 181, 235, 293, 297
Antiglare night position ................................................. 71
Antilock brake system (ABS) ....................................... 201 LOW RANGE – ABS ..................................................202
Malfunction indicator lamp .....................................222
Antitheft alarm system ................................................... 35
Aquaplaning ................................................................... 178 Ashtray
Center console, front ................................................ 118
Rear passenger compartment ................................. 118
Automatic central locking ..............................................32
Automatic transmission ................................................ 165 Emergency Operation ............................................... 172
Fluid level .................................................................. 234
Selector lever position .............................................. 168
Transmission selector lever, manually unlocking 259
BBabySmart
TM airbag deactivation system ..................... 53
Self-test ......................................................................... 53
BAS (Brake assist system) ............................................ 199 Malfunction indicator lamp .....................................221
Battery .............................................................................251 Battery recycling ...................................................... 252
Charge indicator lamp ............................................. 223
Battery, remote control ................................................. 270
Block heater .................................................................... 182
Blocking of rear door windows ....................................105
Brake assist system (BAS) ............................................ 199 Malfunction indicator lamp .....................................221

Contents
Transmission control –
LOW RANGE mode............................. 125
Switching on LOW RANGE mode.. 125
Switching off LOW RANGE mode . 125
Good visibility .................................... 126
Rear view mirror........................... 126
Electrically folding exterior
rear view mirrors .......................... 128
Windshield wipers ........................ 129
Headlamp cleaning system* ........ 131
Rear window wiper ....................... 131
Sun visor ...................................... 132
Rear window defroster ................. 133
Automatic climate control ................. 134
Automatic mode........................... 137
Adjusting air volume and
air distribution manually............... 137
Defrosting .................................... 138
Air recirculation mode.................. 138
Air conditioning ............................ 139
Residual heat and ventilation ....... 140
Rear passenger compartment
ventilation and rear automatic
climate control ............................. 141
Front and rear air vents................ 142Power windows .................................. 144
Opening and closing
the side windows .......................... 144
Synchronizing power windows ...... 146
Rear quarter windows* ................. 146
Sliding / pop-up roof* ......................... 148
Opening and closing the
sliding / pop-up roof ...................... 148
Synchronizing the
sliding / pop-up roof ...................... 149
Driving systems .................................. 150
Cruise control ............................... 150
Parktronic system*
(Parking assist) ............................. 153
Loading............................................... 157
Loading instructions ..................... 157
Partition net* ................................ 159
Cargo area cover blind* ................ 161
Cargo floor plates ......................... 162
Roof rack* .................................... 163Useful features ................................... 164
Interior storage spaces ................. 164
Cup holders .................................. 166
Armrest in rear seat bench ........... 167
Ashtrays and cigarette lighter ....... 168
Electrical outlet............................. 170
Telephone* ................................... 170
Tele Aid* ....................................... 171
Garage door opener ...................... 180
Trip computer* ............................. 186

Contents
Opening / closing in an emergency .... 265
Sliding / pop-up roof* ................... 265
Replacing bulbs ................................. 266
Bulbs ............................................ 266
Replacing bulbs for front lamps ... 268
Replacing bulbs for rear lamps..... 270
Adjusting headlamp aim............... 272
Replacing wiper blades ...................... 273
Removing ..................................... 273
Installing ...................................... 273
Flat tire .............................................. 274
Mounting the spare wheel............ 274
Battery ............................................... 278
Disconnecting the battery ............ 279
Removing the batteries ................ 279
Charging and reinstalling
batteries....................................... 279
Reconnecting the batteries .......... 279
Jump starting ..................................... 281
Towing the vehicle ............................. 283
Front towing eye .......................... 285
Rear towing eye ........................... 285
Stranded vehicle .......................... 286Fuses .................................................. 287
Fuse box in engine
compartment ................................ 287
Auxiliary fuse box in front
passenger footwell........................ 288
Technical data.................................. 289
Spare parts service............................. 290
Warranty coverage ............................. 291
Loss of Service and Warranty
Information Booklet ...................... 291
Identification labels ............................ 292
Layout of poly-V-belt drive .................. 293
Engine ................................................ 294
Rims and tires .................................... 295
Rims and tires ............................... 295
Spare wheel .................................. 296
Electrical system ................................ 297
Main Dimensions ................................ 298
Weights .............................................. 299Fuels, coolants, lubricants etc............ 300
Capacities ..................................... 300
Engine oils .................................... 302
Engine oil additives ....................... 302
Air conditioning refrigerant ........... 302
Brake fluid .................................... 302
Premium unleaded gasoline.......... 303
Fuel requirements......................... 303
Gasoline additives......................... 303
Coolants ....................................... 304
Anticorrosion / antifreeze.............. 305
Windshield washer system and
headlamp cleaning system* ......... 307
Windshield and headlamp
washer fluid mixing ratio............... 307
Consumer information........................ 308
Uniform tire quality grading .......... 308
Temperature ................................. 309
Technical terms............................... 311Index................................................. 317

11 Introduction
Operator’s Manual
Important notice for California retail
buyers and lessees of Mercedes-Benz automobiles
Under California law you may be entitled to
a replacement of your vehicle or a refund
of the purchase price or lease price, if
Mercedes-Benz USA, LLC and / or its au-
thorized repair or service facilities fail to fix
one or more substantial defects or mal-
functions in the vehicle that are covered by
its express warranty after a reasonable
number of repair attempts. During the pe-
riod of 18 months from original delivery of
the vehicle or the accumulation of
18 000 miles (approx. 29 000 km) on the
odometer of the vehicle, whichever occurs
first, a reasonable number of repair at-
tempts is presumed for a retail buyer or
lessee if one or more of the following oc-
curs:(1) the same substantial defect or mal-
function results in a condition that is
likely to cause death or serious bodily
injury if the vehicle is driven, that de-
fect or malfunction has been subject to
repair two or more times, and you have
directly notified Mercedes-Benz USA,
LLC in writing of the need for its repair,
(2) the same substantial defect or mal-
function of a less serious nature than
category (1) has been subject to repair
four or more times and you have direct-
ly notified us in writing of the need for
its repair, or(3) the vehicle is out of service by reason
of repair of the same or different sub-
stantial defects or malfunctions for a
cumulative total of more than
30 calender days. Written notification
should be sent to us, not a dealer, at
Mercedes-Benz USA, LLC, Customer
Assistance Center, One Mercedes
Drive, Montvale, NJ 07645-0350.

136 Controls in detailAutomatic climate controlThe automatic climate control is operatio-
nal whenever the engine is running. You
can operate the climate control system in
either the automatic or manual mode. The
system cools or heats the interior depend-
ing on the selected interior temperature
and the current outside temperature.
Nearly all dust particles, pollutants and
odors are filtered out before outside air en-
ters the passenger compartment through
the air distribution system.Warning!
G
When operating the automatic climate con-
trol, the air that enters the passenger com-
partment through the air vents in the
footwell can be very hot or very cold (de-
pending on the set temperature). This may
cause burns or frostbite on unprotected skin
in the immediate area of the air vents.
Always keep sufficient distance between un-
protected parts of the body and the footwell
air vents. If necessary, change the air flow
using the air distribution controls to direct
the air away from the footwell air vents
(page 138).
Warning!
G
Follow the recommended settings for heat-
ing and cooling given on the following pag-
es. Otherwise the windows could fog up,
impairing visibility and endangering you and
others.
iSevere conditions (e.g. strong air pollu-
tion) may require replacement of the fil-
ter before its scheduled interval. A
clogged filter will reduce the air volume
to the interior.
If the vehicle interior is hot, ventilate
the interior before driving off.
Keep the air intake grille in front of the
windshield free of snow and debris.
Do not touch the interior temperature
sensor to maintain a precise tempera-
ture.
The set value is indicated by a lighted
segment on the control wheels.

139 Controls in detail
Automatic climate control
Activating
Press buttonÄ (
page 135).
The indicator lamp on the button
comes on.
Deactivating

Press buttonÄ (
page 135).
The indicator lamp on the button goes
out.
Air conditioning
The air conditioning is operational while
the engine is running and cools the interior
air to the temperature set by the operator.Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the automatic
climate control system. The air in the vehi-
cle will then no longer be cooled or dehu-
midified.

Press button° (
page 135).
The indicator lamp on the button°
comes on.
Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.

Press button° again.
The indicator lamp on the button°
goes out.
The air conditioning system uses the refrig-
erant R-134a. This refrigerant is free of
CFCs which are harmful to the ozone layer.
iTo achieve the fastest possible cooling
of the interior, the automatic climate
control automatically switches to air
recirculation. The indicator lamp in the
buttonÄ is not illuminated when
the system automatically switches to
air recirculation.
iThe air recirculation mode is
deactivated automatically

after 30 minutes if the automatic
climate control is switched on


after five minutes if the air condi-
tioning is switched off


after five minutes if the outside
temperature is above approximate-
ly 45°F (7 °C)
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.