Page 416 of 539

415 Practical hints
What to do if …
When the
Add 1 qt. engine oil when
next refueling
(Canada:
1 liter
) mes-
sage appears while the engine is running
and at operating temperature, the engine
oil level has dropped to approximately the
minimum level.
When this occurs, the warning will first
come on intermittently and then stay on if
the oil level drops further.Visually check for oil leaks. If no obvious oil
leaks are noted, drive to the nearest
service station where the engine oil should
be topped to the required level with an ap-
proved oil specified in the Factory
Approved Service Products pamphlet.
Display symbol
Display messages
Possible cause
Possible solution
N
Engine oil level
Visit workshop
The engine oil has dropped to a
critical level.
Check the engine oil level (
page 328)
(ML 500 only), or (
page 330) (ML 350
only) and add oil as required
(
page 331).
If you must add engine oil frequently, have
the engine checked for possible leaks.
Oil sensor malfunction
Visit workshop
The measuring system is mal-
functioning.
Have the measuring system checked by
an authorized Mercedes-Benz Light Truck
Center.
!The engine oil level warnings should
not be ignored. Extended driving with
the symbol displayed could result in
serious engine damage that is not
covered by the Mercedes-Benz Limited
Warranty.
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 516 of 539

515 Index
Emergency operations
Closing tilt/sliding sunroof* 439
Locking the vehicle 436
Opening tilt/sliding sunroof* 439
Remote door unlock 288
Unlocking the vehicle 435
Emergency tensioning device see ETD
Emission control 321
Ending
A call (telephone*) 180
Engine
Message in the display 410
Starting 49
Starting with KEYLESS-GO* 50
Technical data 486
Turning off 62
Engine cleaning 376
Engine compartment
Hood 326
Main fuse box 478
Engine malfunction
indicator lamp 385, 410
Engine malfunction indicator
lamp (Canada only) 25
Engine malfunction indicator
lamp (USA only) 25Engine number 502
Engine oil 327, 495
Adding 331
Additives 495
Checking level 327
Checking with the
control system (ML 500 only) 328
Checking with the
oil dipstick (ML 350 only) 330
Consumption 327
Display messages 414–415
Messages in display 329, 414–415
Viscosity 502
ESP
®
25, 95, 502
Off-road-ESP
®
98
Switching off 97
Switching on 98
Warning lamp 387
ETD 502
Safety guidelines 70
ETD (Emergency tensioning device) 76
Exterior mirrors
Folding 197
Exterior rear view mirrors
Adjusting 44
Parking position* for 174F
Fastening the seat belts 46
First aid kit 430
Flat tire 456
Lowering the vehicle 460
Preparing the vehicle 457
Spare wheel 433
Flexible Service System PLUS
(FSS PLUS) 502
Floormats* 279
Fluid level
Automatic transmission 332
Fog lamp, rear
Switching on 142
Fog lamps
Replacing bulbs 443
Fog lamps, front
Messages in display 418
Replacing bulbs 445
Switching on 142
Folding
Exterior mirrors 197
Folding the backrest forward 261
4-ETS 98
Off-road - 4-ETS 99
Page 523 of 539

522 IndexN
Navigation system see separate Modular
COMAND System operating instructions
Night security illumination 141
Normal occupant weight 366
O
Occupant Classification System 81
Self-test 86
Occupant Classification System see OCS
Occupant distribution 366
Occupant safety 66
Children and air bags 68
Children in the vehicle 78
Fastening the seat belt 46
Infant and child restraint systems 78
LATCH type child seat mounts 88
Seat belts 46, 70
OCS 504
Off-road - 4-ETS 99
Off-road - ABS 94
Off-road - ESP
®
98Off-road driving
Checklist 307, 313
Crossing obstacles 311
Driving instructions off-road
driving 306
Driving through water 310
Returning 313
Rules 307
Special driving features 306
Steep terrain 308
Off-road driving program 248
Switching off 249
Switching on 249
Oil
Adding 331
Consumption 327
Dipstick 327
Filler neck 331
Viscosity 502
One-touch gearshifting
Canceling gear range limit 190Opening
Doors from the inside 117
Fuel filler flap 323
Fuel filler flap manually 438
Glove box 270
Hood 326
Power tilt/sliding sunroof* 439
Side windows 232
Tailgate 118
Tilt/sliding sunroof* 235
Tilt/Sliding sunroof* in an
emergency 439
Windows 230
Opening the tailgate from
the inside electrically* 118
Opening the tailgate from
the outside 118
Page 532 of 539

531 Index
Tar stains 375
Technical data 495
Brake fluid 495
Coolants 497
Electrical system 490
Engine 486
Engine oil 495
Engine oil additives 495
Fuel requirements 496
Gasoline additives 497
Main dimensions 491
Premium unleaded gasoline 496
Rims and tires 487
Weights 492
Windshield washer and
headlamp cleaning* system 500Tele Aid* 280
Call priority 287
Emergency calls 282
Information 286
Initiating an emergency call
manually 284
Messages in display 425, 426
Remote door unlock 288
Roadside assistance 284
Stolen vehicle recovery services 289
System self-check 282
Tele Aid* System 505
Telematics* 506
Telephone* 279
Answering a call 179
Dialing a number from
the phone book 180
Ending a call 180
Loading phone book* 180
Operating 178
Redialing 181Telephones and two-way radios 320
Telescoping rod 268
Temperature
Setting interior
temperature 207, 221
Tires 346
The coolant level is correct if
the level 333
Tie-down rings
(Cargo compartment) 260
Tightening torque 506
Tightening torque (Wheel bolts) 461
Tilt
Head restraint 41
Tilt/sliding sunroof*
Closing 235
Closing with KEYLESS-GO* 234
Opening 235
Synchronizing 237
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