Page 405 of 539

404 Practical hintsWhat to do if …Display message
Possible cause
Possible solution
Front passenger
airbag
deactivated
see Oper.’s Man.
Monitor the 59indicator lamp on the center console (
page 27) and the
multifunction display in the instrument cluster (
page 24) for the following:
With the seat unoccupied and the ignition turned on,
the 59indicator lamp on the center console should illuminate and
remain illuminated, indicating that the OCS (
page 81) has deactivated the
air bag.
the message
Front passenger airbag activated see Oper.’s Man.
or the
message
Front passenger airbag deactivated see Oper.’s Man.
should
not appear in the multifunction display at any time the seat is unoccupied.
Wait at last 60 seconds for the system to complete the necessary check cy-
cles and to make sure neither message appears in the multifunction display.
If above conditions are met, you can occupy the front passenger seat again.
Depending on the front passenger classification sensed by the OCS (
page 81),
the59indicator lamp will remain illuminated or go out.
If above conditions are not met, the system is not working properly. Have the
system checked as soon as possible by an authorized Mercedes-Benz Light
Truck Center.
Warning!
G
If the 59indicator lamp remains
illuminated with an adult occupant on the
front passenger seat even after performing
the above corrective steps, do not have any
passenger use the front passenger seat until
the system has been repaired.
Page 413 of 539
412 Practical hintsWhat to do if …Display symbol
Display messages
Possible cause
Possible solution
Ï
Coolant
Stop, engine off
The poly-V-belt could be broken.
Stop the vehicle and immediately turn off
the engine.
Check the poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise the
engine will overheat due to an inoperative
water pump which may result in damage
to the engine. Notify an authorized
Mercedes-Benz Light Truck Center.
If it is intact:
Do not continue to drive the vehicle with
this message displayed. Doing so could
result in serious engine damage that is
not covered by the Mercedes-Benz Limit-
ed Warranty.
Drive immediately to the nearest autho-
rized Mercedes-Benz Light Truck Center.
Coolant
Visit workshop
The cooling fan for the coolant is
malfunctioning.
Observe the coolant temperature gauge
in the instrument cluster.
Have the fan replaced as soon as possi-
ble.
Page 414 of 539
413 Practical hints
What to do if …
Display symbol
Display messages
Possible cause
Possible solution
G
Display malfunction
Visit workshop
The instrument cluster display is
malfunctioning.
Continue driving with added caution.
Visit an authorized Mercedes-Benz Light
Truck Center as soon as possible.
The displays for several systems
have malfunctioned. Some sys-
tems themselves may also have
malfunctioned.
Have the electronic systems checked by
an authorized Mercedes-Benz Light Truck
Center.
±
Display malfunction
Visit workshop
Certain electronic systems are
unable to relay information to
the control system. The follow-
ing systems may have failed:
Coolant temperature display
Tachometer
Cruise control display
Have the electronic systems checked by
an authorized Mercedes-Benz Light Truck
Center.
J
Doors open
Door open
You are attempting to drive with
one or more doors open.
Close the doors.
Page 472 of 539

471 Practical hints
Jump starting
The jump-start contacts are located in the
engine compartment.
Make sure the two vehicles do not
touch.
Turn off all electrical consumers.
Apply parking brake.
Shift gear selector lever to positionP.1Negative (-) terminal
2Cover of Positive (+) terminal
Open cover2 of the positive terminal
of both vehicles.
Connect positive terminal2 and the
positive terminal of the charged battery
with the jumper cable. Clamp cable to
charged battery first.
Start engine of the vehicle with the
charged battery and run at idle speed.
Connect negative terminals1 and the
negative terminal of the charged
battery with the jumper cable. Clamp
cable to charged battery first.
Start the engine of the disabled vehi-
cle.
Now you can again turn on the electrical
consumers. Do not turn on the lights under
any circumstances.
Remove the jumper cables first from
the negative terminals on each battery
and then from the positive terminals on
each battery.
Now you can turn on the lights.
Have the battery checked at the near-
est authorized Mercedes-Benz Light
Truck Center.
Warning!
G
Keep flames or sparks away from battery.
Do not smoke.
Observe all safety instructions and precau-
tions when handling automotive batteries
(page 462).!Never invert the terminal connections!
iThe message
Undervoltage - Switch
off consumers may appear in the
instrument cluster. It will disappear as
soon as the battery is sufficiently
charged.
!Do not tow-start the vehicle.
Page 504 of 539

503 Technical terms
Gear range
Number of gears which are available to
the automatic transmission for shifting.
The automatic gear shifting process
can be adapted to specific operating
conditions using the gear selector
lever.
GPS
(G
lobal P
ositioning S
ystem)
Satellite-based system for relaying
geographic location information to and
from vehicles equipped with special re-
ceivers. Employs CD or DVD digital
maps for navigation.
GVW
(G
ross V
ehicle W
eight)
The GVW comprises the weight of the
vehicle including fuel, tools, spare
wheel, installed accessories, passen-
gers and cargo. The GVW must never
exceed the GVWR, indicated on the
certification label located on the driv-
er’s door pillar.GVWR
(G
ross V
ehicle W
eight R
ating)
This is the maximum permissible vehi-
cle weight. It is indicated on certifica-
tion label located on the driver’s door
pillar.
Instrument cluster
The displays and indicator/warning
lamps in the driver’s field of vision, in-
cluding the tachometer, speedometer,
engine temperature and fuel gauge.
KEYLESS-GO*
System for entering and operating the
vehicle without the use of a SmartKey.
Kickdown
Depressing the accelerator past the
point of resistance shifts the transmis-
sion down to the lowest possible gear.
This very quickly accelerates the vehi-
cle and should not be used for normal
acceleration needs.
Kilopascal (kPa)
(
page 366)Line of fall
The direct line that an object moves
downhill when influenced by the force
of gravity alone.
Locking knob
Knob on the door which indicates
whether the door is locked or un-
locked. Pushing the locking knob down
on an individual door from inside will
lock that door.
Maintenance System (U.S. vehicles)
Maintenance service indicator in the
multifunction display that informs the
driver when the next vehicle mainte-
nance service is due. The Maintenance
System in your vehicle tracks distance
driven and the time elapsed since your
last maintenance service, and calls for
the next maintenance service accord-
ingly.
Maximum load rating
(
page 366)
Maximum loaded vehicle weight
(page 366)
Page 508 of 539

507 Index
A
ABS 93, 501
ABS control 93
Malfunction indicator lamp 382
Messages in display 397
Off-road - ABS 94
Warning lamp 382
Accelerator position, automatic
transmission 190
Accessory weight 365
Accident
In case of 59
Activating
Air circulation mode 226
Air conditioning (cooling) 211
Air recirculation mode 209, 224
Anti-theft alarm system 101
Central locking (control system) 172
Defrosting 208
Easy-entry/exit feature* 173
ESP
®
98Exterior headlamps 54
Hazard warning flasher 145
Headlamps 54
High beams 142
Ignition 34
Immobilizer 62, 100
Rear window defroster 201
Rear window wiper 58
Residual heat 212, 227
Seat heating* 134
Tow-away alarm 102
Warning indicators (Parktronic*) 256
Windshield wipers 55
Adaptive Damping
System (ADS)* 249, 501
Adding
Coolant 333
Engine oil 331
Additional turn signals 443Adjusting 38
Air distribution 207, 222
Air volume 207, 208, 222
Backrest tilt 40
Compass zone 171
Exterior rear view mirror 44
Head restraint height 40
Head restraint tilt 41
Headlamp aim 451
Instrument cluster illumination 148
Interior rear view mirror 44
Mirrors 43
Multicontour seat* 132
Seat cushion depth 132
Seat cushion tilt 40
Seat fore and aft adjustment 39
Seat height 39
Seats 38
Steering column height 43
Steering wheel 41
Adjusting steering column 43
ADS* 501
Page 512 of 539

511 Index
Checking
Coolant level 332
Engine oil with the
control system (ML 500 only) 328
Engine oil with the
oil dipstick (ML 350 only) 330
Oil level 327
Tire inflate pressure 325
Vehicle lighting 325
Checking tire pressure
electronically with the
Advanced Tire Pressure Monitoring
System* (Advanced TPMS*) 351
Checking weights
Trailer and vehicle 315
Checklist
Off-road driving 307
Returning from off-road driving 313
Child safety 78
Air bags 68
Infant and child
restraint systems 73, 78
LATCH type child seat mounts 88Child safety switch see Blocking of rear
door window operation
Cigarette lighter*
Front center console 275
Cleaning
Carpet 379
Cup holder 379
Gear selector lever 379
Hard plastic trim items 379
Headlamps 194
Headliner 379
Instrument cluster 379
Leather upholstery* 380
Light alloy wheels 379
MB Tex upholstery 380
Plastic and rubber parts 380
Seat belts 379
Steering wheel 379
Windows 378
Windshield 56
Wiper blades 378
Cleaning and care of the vehicle 374
Cleaning tires 337Climate control 202
Adjusting 207
Adjusting air volume 208
deactivating 206
Defrosting 208
Rear passenger compartment 213
Rear window defroster 200
Setting the temperature 207
Clock 165
Closing
Glove box 270
Hood 327
Power tilt/sliding sunroof* 439
Side windows 231
Side windows with
KEYLESS-GO* 234
Tailgate 120
Vehicle with KEYLESS-GO* 123,
124
Tilt/sliding sunroof* 235
Tilt/sliding sunroof* with
KEYLESS-GO* 234
Windows 230
Page 513 of 539

512 IndexClosing the tailgate 123, 124
Closing the tailgate from
the inside electrically* 120
Closing the tailgate from the
outside (vehicles without
KEYLESS-GO*) 121
Closing tilt/sliding sunroof*
In an emergency 439
Cockpit 22, 501
Cold tire inflation pressure 365
Combination switch 142
High beam 54
Turn signals 54
Windshield wipers 55
Compass 295
Adjusting compass zone 171
Calibrating 171
Zone map North America 295
Zone map South America 295
Control and operation
of radio transmitters 320Control system 502
AUDIO menu 157
Convenience submenu 173
Display digital speedometer 156
Functions 154
Instrument cluster
submenu 164, 165
Lighting submenu 167
Menus 153, 154
Message memory menu 159
Selecting radio system 157
Selecting satellite radio* station
(USA only) 157
Settings menu 161
Standard display menu 156
Submenus 152, 154
TEL* menu 178
Trip computer menu 177
Vehicle submenu 171
Convenience submenu 173
Activating easy-entry/exit
feature* 173
Setting parking position*
for exterior rear view mirror 174Coolant 332, 497
Adding 333
Anticorrosion/antifreeze
quantity 498
Checking level 332
Messages in display 410, 412
Temperature 322
Coolant level
Checking 332
Corner-illuminating front fog lamps* 143
Switching off 144
Switching on 143, 144
Crossing obstacles 311
Cruise control 238, 502
Canceling 240
Driving downhill 240
Driving uphill 240
Message in display 398
Setting current speed 239
Setting speeds 243
Cruise control lever 238, 246