2005 MERCEDES-BENZ ML500 air conditioning

Contents
Automatic climate control ................. 136
Automatic mode........................... 139
Adjusting air volume and
air distribution manually............... 139
Defrosting .................................... 140
Air recirculation mode.................. 140
Air conditioning ............................ 141
Residual heat and ventilation ....... 142
Rear passenger compartment
ventilation and rear
automatic climate control ............ 143
Front and rear air vents................ 144
Power windows.................................. 146
Opening and closing
the side windows ......................... 146
Synchronizing power windows ..... 148
Rear quarter windows* ................ 148
Power tilt / sliding sunroof* ............... 150
Opening and closing the
power tilt / sliding sunroof............ 150
Synchronizing the
power tilt / sliding sunroof............ 152Driving systems .................................. 153
Cruise control ............................... 153
Parktronic* system
(Parking assist) ............................. 156
Loading............................................... 160
Loading instructions ..................... 160
Partition net* ................................ 162
Cargo compartment cover blind* . 164
Cargo floor plates ......................... 165
Roof rack* .................................... 166
Useful features ................................... 167
Storage compartments ................. 167
Cup holders .................................. 169
Armrest in rear seat bench ........... 170
Ashtrays and cigarette lighter ....... 171
Electrical outlet ............................. 173
Telephone* ................................... 173
Tele Aid* ....................................... 174
Garage door opener ...................... 183
Trip computer* ............................. 189
Operation.......................................... 195
The first 1000 miles (1500 km) .......... 196
Driving instructions ............................ 197
Drive sensibly – save fuel ............. 197
Drinking and driving...................... 197
Pedals ........................................... 197
Power assistance .......................... 197
Brakes .......................................... 198
Driving off ..................................... 199
Parking ......................................... 200
Tires.............................................. 200
Hydroplaning ................................ 201
Tire traction .................................. 201
Tire speed rating ........................... 202
Winter driving instructions ............ 202
Standing water ............................. 204
Off-road driving ............................. 204
Trailer towing ................................ 211
Passenger compartment............... 215
Driving abroad .............................. 216
Control and operation
of radio transmitters ..................... 216
Catalytic converter ....................... 217
Emission control ........................... 217
Coolant temperature .................... 218

Contents
Battery ............................................... 288
Disconnecting the battery ............ 289
Removing the battery ................... 289
Charging and
reinstalling the battery ................. 289
Reconnecting the battery ............. 289
Jump starting ..................................... 291
Towing the vehicle ............................. 293
Front towing eye .......................... 295
Rear towing eye ........................... 295
Stranded vehicle .......................... 296
Fuses ................................................. 297
Aids for changing fuses ................ 298
Main fuse box............................... 298
Fuse box in
front passenger footwell .............. 299
Technical data.................................. 301
Parts service....................................... 302
Warranty coverage ............................. 303
Loss of Service and Warranty
Information Booklet ...................... 303
Identification labels ............................ 304
Layout of poly-V-belt drive .................. 305
Engine ................................................ 306
Rims and tires .................................... 307
Rims and tires ............................... 307
Spare wheel .................................. 308
Electrical system ................................ 309
Main Dimensions ................................ 310
Weights .............................................. 311Fuels, coolants, lubricants, etc. .......... 312
Capacities ..................................... 312
Engine oils .................................... 314
Engine oil additives ....................... 314
Air conditioning refrigerant ........... 314
Brake fluid .................................... 314
Premium unleaded gasoline.......... 315
Fuel requirements......................... 315
Gasoline additives......................... 315
Coolants ....................................... 316
Windshield washer and
headlamp cleaning* system ......... 319
Windshield and headlamp
washer fluid mixing ratio............... 319
Consumer information........................ 320
Uniform tire quality grading .......... 320
Technical terms............................... 323Index................................................. 329

141 Controls in detail
Automatic climate control
Activating
Press buttonÄ (
page 137).
The indicator lamp on the buttonÄ
comes on.
Deactivating

Press buttonÄ (
page 137).
The indicator lamp on the buttonÄ
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 137).
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.

142 Controls in detailAutomatic climate control
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
position0 or1 (
page 33).

Press button° (
page 137).
The indicator lamp on button°
comes on.Deactivating

Press button°.
The indicator lamp on button°
goes out.
!If the °button on the automatic
climate control panel starts to flash,
this indicates that the air conditioning
system is losing refrigerant. The com-
pressor 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 by the
operator. The blower will run at lower
speed regardless of the air volume con-
trol 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

215 Operation
Driving instructions


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 127).


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.
Passenger compartmentWarning!
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 rear cargo compartment is the preferred
place to carry objects. Always use the parti-
tion net when transporting cargo. Partition
net cannot secure hard or heavy objects. Al-
ways fasten items being carried as securely
as possible using the cargo tie-down rings in
the cargo floor area and fastening materials.

305 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

313 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
including a reserve of
ML 350, ML 500
22.0 US gal (83.0 l)
approx. 3.2 US gal (12.0 l)
Premium unleaded gasoline:
Minimum Posted Octane 91
(Avg.of96RON/86MON)
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
premixed windshield washer solvent / antifreeze for temperatures below freezing. Follow suggested mixing ratios (page 319).

314 Technical dataFuels, coolants, lubricants, etc.Engine oils
Engine oils are specifically tested for their
suitability in our engines and durability for
our service intervals. Therefore, only use
approved engine oils and oil filters re-
quired for vehicles with Maintenance Sys-
tem (U.S. vehicles) or FSS (Canada
vehicles). For a listing of approved engine
oils and oil filters, refer to the Factory Ap-
proved Service Products pamphlet, or con-
tact an authorized Mercedes-Benz Light
Truck Center.
Using engine oils and oil filters of specifica-
tion other than those expressly required
for the Maintenance System
(U.S. vehicles) or FSS (Canada vehicles), or
changing of oil and oil filter at change inter-
vals longer than those called for by the
Maintenance System (U.S. vehicles) or
FSS (Canada vehicles) will result in engine
damage not covered by the
Mercedes-Benz Limited Warranty.Please follow Maintenance System
(U.S. vehicles) or FSS (Canada vehicles)
recommendations for schedulded 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 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 are 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
system’s efficiency.
Therefore, the brake fluid must be
replaced every two years, preferably in the
spring.
Only brake fluid approved by
Mercedes-Benz is recommended. Your
authorized Mercedes-Benz Light Truck
Center will provide you with additional in-
formation.