air conditioning MERCEDES-BENZ ML320 1997 Complete User Guide

210 OperationDriving instructions

The vehicle and trailer combination is
heavier, and therefore is limited in ac-
celeration and climbing ability, and re-
quires longer stopping distances.
I t i s m o r e p r o n e t o r e a c t i n g t o s i d e w i n d
gusts, and requires more sensitive
steering input.


If possible, do not brake abruptly, but
rather engage the brake slightly at first
to permit the trailer to activate its
brake. Then increase the braking force.


If the transmission hunts between
gears on inclines, manually shift to a
lower gear (select 4, 3, 2 or 1).
A lower gear and reduction of speed re-
duces the chance of engine overload-
ing and / or overheating.


On very steep inclines, not manageable
with gear selector lever in position1,
switch transfer case to LOW RANGE
mode (
page 125).


When going down a long hill, shift into
a lower gear and use the engine’s brak-
ing effect.
Avoid riding the brakes, thus overheat-
ing the vehicle and trailer brakes.


If the engine coolant rises to an ex-
tremely high temperature (coolant tem-
perature needle approaching the red
zone) when the air conditioning is on,
turn off the air conditioning system.
Engine coolant heat can be additionally
vented by opening the windows,
switching the climate control fan speed
to high and setting the temperature
control to the maximum hot position.


Extreme care must be exercised since
your vehicle with a trailer will require
additional passing distance ahead than
when driving without a trailer.
Because your vehicle and trailer is
longer than your vehicle alone, you will
also need to go much farther ahead of
the passed vehicle before you can re-
turn to your lane.
!If the trailer should begin to sway, re-
duce the vehicle’s speed and use the
brake controller by hand to straighten
out the vehicle and trailer.
In no case should you attempt to
straighten out the tow vehicle and trail-
er by increasing the speed or overstee-
ring and stepping on the brakes.

293 Technical data
Layout of poly-V-belt drive
Layout of poly-V-belt drive
1Automatic belt tensioner
2Power steering pump
3Air conditioning compressor
4Crankshaft
5Coolant pump
6Generator (alternator)
7Idler pulley

301 Technical data
Fuels, coolants, lubricants etc.
Model
Capacity
Fuels, coolants, lubricants etc.
Cooling system
approx. 12.7 US qt (12.0 l)
MB Anticorrosion / Antifreeze
Fuel tank
ML 350, ML 500
22.0 US gal (83.0 l)
Premium unleaded gasoline:
Posted Octane 91 (Avg. of 96 RON / 86 MON
including a reserve of
approx. 3.2 US gal (12.0 l)
Air conditioning system
R-134a refrigerant and special PAG lubricant
oil (never R-12)
Windshield washer and
headlamp cleaning
system*
8.0 US qt (7.6 l)
MB Windshield Washer Concentrate
1
1Use MB Windshield Washer Concentrate “S” and water for temperatures above freezing or MB Windshield Washer Concentrate “S” and commercially available pre-
mixed windshield washer solvent / antifreeze for temperatures below freezing. Follow suggested mixing ratios (page 307).

302 Technical dataFuels, coolants, lubricants etc.Engine oils
Engine oils are specifically tested for their
suitability in our engines. Therefore, use
only engine oils approved by
Mercedes-Benz. Information on approved
engine oils is available in the Factory
Approved Service Products pamphlet, or at
your authorized Mercedes-Benz Light
Truck Center.
Engine oil additives
Do not blend oil additives with engine oil.
They may damage the engine.
Damage or malfunctions resulting from
blending oil additives are not covered by
the Mercedes-Benz Limited Warranty.Air conditioning refrigerant
R-134a (HFC) refrigerant and special PAG
lubricating oil is used in the air condition-
ing system.
Never use R-12 (CFC) or mineral-based lu-
bricating 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 strenu-
ous operating conditions, this moisture
content can lead to the formation of bub-
bles in the system, thus reducing the sys-
tem’s efficiency.
Therefore, the brake fluid must be re-
placed every two years, preferably in the
spring.
Only brake fluid approved by
Mercedes-Benz is recommended. Your au-
thorized Mercedes-Benz Light Truck
Center will provide you with additional in-
formation.
!Always check the oil filler cap
(page 221) for important information
pertaining to the engine oil needing to
meet a specific Mercedes-Benz specifi-
cation (e.g. MB 229.5). If such informa-
tion is printed on the oil filler cap, only
use an engine oil from the list of ap-
proved engine oils in the Factory Ap-
proved Service Products pamphlet that
meets the specification indicated on
the oil filler cap.
Using engine oils of other specification
may cause the FSS to incorrectly deter-
mine the next service interval and will
result in engine damage not covered by
the Mercedes-Benz Limited Warranty.

317 Index
A
ABS 25, 76, 311
ABS control 76
LOW RANGE mode 77
Malfunction indicator lamp 242
Warning lamp 242
Accelerator position, automatic
transmission 123
Accident
In case of 52
Activating
Air circulation mode 139
Air recirculation mode 139
Anti-theft alarm system 83
Automatic climate control 135
ESP 82
Exterior headlamps 48
Hazard warning flasher 112
Headlamps 48
High beams 110
Ignition 33Immobilizer 54, 83
Rear passenger compartment ventila-
tion and climate control 141
Rear window defroster 133
Rear window wiper 51
Residual heat 140
Seat heater* 98
Tow-away alarm 85
Warning indicators (Parktronic*) 155
Windshield wipers 50
Activating automatic central locking 93
Adding
Coolant 223
Engine oil 221
Additional turn signals 266
Adjustable steering column
Indicator lamp 253
Adjusting 34
Backrest tilt 36, 38
Exterior rear view mirror 40
Head restraint height 36, 38Head restraint tilt 37, 39
Headlamp aim 272
Instrument cluster illumination 116
Manual seat 35
Mirrors 40
Power seats* 37
Seat cushion tilt 38
Seat fore and aft 35
Seat fore and aft adjustment 37
Seat height 36, 38
Seats 34
Steering wheel 39
Adjusting air distribution
Automatic climate control 137
Adjusting air volume
Automatic climate control 137
Air conditioner (cooling)
Turning on 139
Air conditioning
Cooling 139

318 IndexAir conditioning refrigerant 302
Air outlets
Automatic climate control 142
Air pressure see Tire inflation
pressure 227
Air recirculation mode 138
Activating 139
Deactivating 139
AIRBAG OFF
Warning lamp 243
Airbags 59
BabySmart
TM airbag deactivation
system 311
BabySmartTM deactivation
system 70
Children 60
Front 63
Passenger 63
Safety guidelines 62
Side impact 64
Window curtain 64Alarm
Audible 75, 84, 86
Canceling 84, 86
Visual 83
Alarm system
Anti-theft 83
Anticorrosion/antifreeze 305
Antiglare
Automatic 126
Antilock brake system (ABS) 311
Anti-theft alarm system
Arming 83
Canceling alarm 84, 86
Disarming 84
Anti-theft systems
Anti-theft alarm system 83
Immobilizer 83
Tow-away alarm, glass breakage
sensor 84
Aquaplaning see Hydroplaning 197
Armrest
Storage compartment in front of 165
Storage spaces 165Armrest in rear seat bench 167
Ashtray
Front center console 168
Rear center console 169
ATF (automatic transmission fluid) 222
Attaching a trailer 208
Automatic antiglare for rear view
mirror 126
Automatic central locking
Activating 93
Deactivating 93
Automatic climate control 134
Adjusting air distribution 137
Adjusting air volume 137
Air conditioning 139
Air outlets 142
Air recirculation mode 138
Basic setting 137
Changing basic setting 137
Defrosting 138
Economy mode 135

322 IndexCoolant 222, 304
Adding 223
Anticorrosion/antifreeze
quantity 304
Checking level 222
Indicator lamp 249
Temperature 213
Temperature gauge 117
Coolant level
Checking 215, 222
Crossing obstacles 204
Cruise control 150, 311
Canceling 151
Driving downhill 151
Driving uphill 151
Fine adjustment 152
LOW RANGE mode 152
Saving current speed 151
Setting speeds 152
Cruise control lever 150Cup holder 166
Cleaning 238
In front seat armrest 167
In instrument panel 166
In rear centerconsole 167
Customer Assistance Center (CAC) 311
D
Daytime running lamp mode 109
Deactivating
Air conditioning (cooling) 139
Air recirculation mode 139
Alarm 84
Anti-theft alarm system 84
Automatic climate control 135, 137
Cruise control 151
Defrost 138
Engine 54
ESP 81
Front fog lamps, rear fog lamp 111
Hazard warning flasher 112
Headlamps 54
Immobilizer 83
Rear passenger compartment ventila-
tion and climate control 141
Rear window defroster 133Residual heat 140
Seat heater* 98
Tow-away alarm 85
Tow-away alarm (vehicles with trip
computer*) 85
Tow-away alarm (vehicles without trip
computer*) 86
Deactivating automatic central
locking 93
Deep water see Standing water 200
Defogging
Windshield 138
Defrosting 138
Difficulties
While driving see Problems while
driving 51
With starting 47
Direction of rotation (tires) 227
Discharged battery
Jump starting 281
Disconnecting
Vehicle battery 279
Display in the speedometer 117

333 Index
Reading lamps 114
Rear automatic climate control 141
Adjusting air volume and air distribu-
tion manually 141
Automatic mode 141
Rear bench seat
Foldable 99
Rear door window
Blocking operation 73
Rear fog lamp 267
Bulb 267
Switching on 111
Rear lamp bulbs
Replacing 270
Rear parking lamp
Replacing bulbs 270
Rear passenger compartment ventilation
and climate control
Activating 141
Deactivating 141
Rear passenger compartment ventilation
and rear automatic climate
control 141Rear quarter windows* 146
Opening 146
Closing 147
Rear seats 99
Easy entry/exit feature* 101
Enlarging cargo area 99
Folding down backrest 100
Folding up 101
Folding up backrest 100
Fore and aft 99
Lowering 100
Third row* 102
Rear standing lamp
Replacing bulbs 270
Rear towing eyes 285
Rear view mirror automatic antiglare 126
Rear view mirrors see Mirrors
Rear window defroster 133
Activating 133
Deactivating 133Rear window wiper 131
Rain sensor* 131
Rear window wiper/washer 51
Reconnecting
Vehicle battery 279
Refrigerant
Air conditioning 302
Refueling 214
Regular checks 215
Reinstalling vehicle battery 279
Remote control
Changing battery 262
Global locking 89
Global unlocking 89
Synchronizing 263
Unlocking liftgate 89
Unlocking the driver’s door, fuel filler
flap 89
Unlocking with 32
Remote control with folding key 88

Fig. 95: ETC Control Module, Location
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Location - The ETC control module (N15/3) is installed in the left footwell, on the heater/air conditioning
housing. See Fig. 95
.
ETC Control Unit, Task
Transmission 722.6 in model 163 with touch shift

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 162 © 2006 Mitchell Repair Information Company, LLC.

Fig. 156: ETC Control Module, Location
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Location
The ETC control module (N15/3) is installed in the left footwell, on the heater/air conditioning housing.
ETC Control Unit, Task
Transmission 722.6 in model 163 with touch shift

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:29 PMPage 275 © 2006 Mitchell Repair Information Company, LLC.