2003 MERCEDES-BENZ ML350 conditioning

Contents
Tow-away alarm,
glass breakage sensor.................... 79
Controls in detail............................... 83
Locking and unlocking ......................... 84
Remote control with folding key ..... 84
Opening the doors
from the inside ............................... 86
Opening the liftgate........................ 87
Closing the liftgate ......................... 88
Automatic central locking .............. 89
Locking and unlocking
from the inside ............................... 90
Seats.................................................... 91
Seat heater*................................... 91
Removing and installing
head restraints ............................... 92
Rear seats ...................................... 93
Third row seats* ............................. 96
Memory function*................................ 99
Storing positions in memory ........ 100
Recalling positions from memory . 100
Exterior rear view mirror parking
position (passenger side) ............. 100Lighting.............................................. 102
Combination switch ..................... 102
Fog lamps .................................... 105
Hazard warning flasher ................ 106
Interior lighting............................. 107
Instrument cluster ............................. 110
Instrument cluster illumination .... 110
Coolant temperature gauge ......... 111
Display in the speedometer ......... 111
Resetting trip odometer ............... 112
Tachometer .................................. 112
Outside temperature indicator ..... 112
Setting the clock .......................... 112
Automatic transmission ..................... 113
One-touch gearshifting................. 113
Gear ranges.................................. 114
Gear selector lever position ......... 115
Accelerator position ..................... 117
Towing a trailer ............................ 117
Emergency operation (Limp Home
Mode)........................................... 117
Transmission control –
LOW RANGE mode............................. 118
Switching on LOW RANGE mode .. 118
Switching off LOW RANGE mode . 118Good visibility .................................... 119
Rear view mirror .......................... 119
Headlamp cleaning system* ........ 121
Windshield wipers ........................ 122
Rear window wiper....................... 123
Sun visor ...................................... 123
Automatic climate control ................. 124
Automatic mode .......................... 126
Adjusting air volume and air
distribution manually ................... 127
Defrosting .................................... 128
Air recirculation mode.................. 128
Air conditioning ............................ 129
Residual heat and ventilation ....... 130
Rear window defroster ................. 131
Rear passenger compartment
ventilation and rear automatic
climate control ............................. 131
Front and rear air outlets ............. 132
Power windows.................................. 134
Opening and closing the side
windows ....................................... 134
Rear quarter windows* ................ 136
Sliding/pop-up roof* ......................... 137
Opening and closing the
sliding/pop-up roof ...................... 137

ContentsPractical hints.................................. 223
What to do if … .................................. 224
Lamps in instrument cluster ......... 224
Additional indicators in the
speedometer display .................... 235
Where will I find ...?............................ 236
First aid kit ................................... 236
Vehicle tool kit ............................. 237
Electric air pump (ML 55 AMG) .... 238
Spare wheel (space-saver tire) ..... 239
Unlocking/locking in an emergency .. 242
Unlocking the vehicle ................... 242
Locking the vehicle ...................... 243
Changing batteries ....................... 243
Fuel filler flap ............................... 244
Manually unlocking the
transmission selector lever .......... 245
Opening/closing in an emergency ..... 246
Sliding/pop-up roof* .................... 246
Replacing bulbs ................................. 247
Bulbs ............................................ 247
Replacing bulbs for front lamps.... 249
Replacing bulbs for rear lamps ..... 251
Adjusting headlamp aim ............... 253Replacing wiper blades ...................... 254
Removal ....................................... 254
Installation ................................... 254
Flat tire .............................................. 255
Mounting the spare wheel ............ 255
Battery ............................................... 261
Disconnecting the battery ............ 261
Removing the batteries ................ 262
Charging and reinstalling
batteries....................................... 262
Reconnecting the batteries .......... 262
Jump starting ..................................... 264
Towing the vehicle ............................. 267
Front towing eye .......................... 269
Rear towing eye ........................... 269
Stranded vehicle .......................... 270
Fuses ................................................. 271
Fuse box in engine
compartment ............................... 271
Auxiliary fuse box in front
passenger footwell ....................... 272
Technical data................................. 273
Spare parts service............................ 274
Warranty coverage ............................ 275
Loss of Service and Warranty
Information Booklet ..................... 275
Identification labels ........................... 276
Layout of poly-V-belt drive ................. 277
Engine ............................................... 278
Rims and tires ................................... 279
Rims and tires .............................. 279
Rims and winter tires* ................. 280
Spare wheel ................................. 280
Electrical system ............................... 281
Main Dimensions ............................... 282
Weights ............................................. 283
Fuels, coolants, lubricants etc. .......... 284
Capacities .................................... 284
Engine oils ................................... 286
Engine oil additives ...................... 286
Air conditioning refrigerant .......... 286
Brake fluid.................................... 286
Premium unleaded gasoline ......... 286
Fuel requirements ........................ 287
Gasoline additives ........................ 287
Coolants ...................................... 287

129 Controls in detail
Automatic climate control
Activating
Press button
O
(page 125).
The indicator lamp on the button lights
up.
Deactivating

Press button
O
(page 125).
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 125).
The indicator lamp on the button
°

lights up.
iTo achieve the fastest possible cooling
of the interior, the automatic climate
control automatically switches to air
recirculation. The indicator lamp in the
button
O
is not illuminated when
the system automatically switches to
air recirculation.
iThe air recirculation mode is activated
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.

130 Controls in detailAutomatic climate controlActivating
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 R134A. This refrigerant is free of
CFCs which are harmful to the ozone layer.
Residual heat and ventilation
With the engine switched off, it is possible
to continue to heat or ventilate the interior
for up to 30 minutes. This feature makes
use of the residual heat produced by the
engine.
Activating
Turn the key in the steering lock to
position1.

Press button
°
(page 125).
The indicator lamp on button
°

comes on.Deactivating

Press button
°
.
The indicator lamp on button
°

goes out.
!If the
°
button on the automatic cli-
mate control panel starts to blink, this
indicates that the air conditioning sys-
tem is losing refrigerant. The compres-
sor has turned itself off. The air
conditioning cannot be turned on
again.
Have the air conditioning system
checked at the nearest authorized
Mercedes-Benz Light Truck Center.
iHow long the system will provide heat-
ing depends on the coolant tempera-
ture and the temperature set in the
climate control. The blower will run at
lower speed regardless of the air vol-
ume control setting.
iThe residual heat is automatically
turned off:

when the ignition is switched on


after about 30 minutes


if the coolant temperature is too
low


if the battery voltage drops

196 OperationDriving instructions

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.Parking
Passenger compartment
Warning!
G
To reduce the risk of personal injury, or
damage to the vehicle powertrain, as a re-
sult of vehicle/trailer movement, always:

Keep right foot on brake pedal.


Shift gear selector lever to positionN.


Have a second person place wheel
chocks on downhill side of left and right
trailer wheels.


Slowly release brake pedal and let vehi-
cle and trailer roll into chocks until
stopped.


Firmly depress parking brake pedal.


Move gear selector lever to position P.


When parked on an incline, turn front
wheel towards the road curb.
Warning!
G
Always fasten items being carried as secure-
ly as possible.
In an accident, during hard braking or sud-
den maneuvers, loose items will be thrown
around inside the vehicle, and cause injury
to vehicle occupants unless the items are
securely fastened in the vehicle.
The trunk is the preferred place to carry ob-
jects. Always use partition net when trans-
porting cargo. Partition net cannot secure
hard or heavy objects.

277 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 pully

285 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 320, ML 350,
ML 500
22.0 US gal (83.0 l)
Premium unleaded gasoline:
Posted Octane 91 (Avg. of 96 RON/86 MON
ML 55 AMG
25.0 US gal (95.0 l)
Premium unleaded gasoline:
Posted Octane 91 (Avg. of 96 RON/86 MON
including a reserve of
approx. 3.2 US qt (12.0 l)
Air conditioning system
R-134a refrigerant and special PAG lubricant
oil (never R-12)
Windshield washer and
headlamp cleaning sys-
tem
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 290).

286 Technical dataFuels, coolants, lubricants etc.Engine oils
Engine oils are specifically tested for their
suitability in our engines. Therefore, use
only engine oils recommended by
Mercedes-Benz. Information on recom-
mended brands 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 be harmful to the engine opera-
tion.
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 Center will pro-
vide you with additional information.
Premium unleaded gasoline
!To maintain the engine’s durability and
performance, premium unleaded gaso-
l i n e m u s t b e u s e d . I f p r e m i u m u n l e a d e d
is not available and low octane fuel is
used, follow these precautions:

Have the fuel tank only partially
filled 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 per-
sons and no luggage.


Do not exceed 2/3 of maximum ac-
celerator pedal position if the vehi-
cle is fully loaded or operating in
mountainous terrain.