2007 MERCEDES-BENZ GL450 child seat

450 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
Vehicles with
BabySmartTM air
bag deactivation
system, Canada
only
59
The front passenger
front air bag off indica-
tor lamp illuminates
and remains
illuminated
(
page 87).
A BabySmartTM child seat is installed on
the passenger seat. Therefore the front
passenger front air bag is switched off.
The system is malfunctioning when there
is no BabySmartTM child seat installed on
the passenger seat.
Have the system checked at an
authorized Mercedes-Benz Light Truck
Center as soon as possible.
The front passenger
front air bag off indica-
tor lamp does not illu-
minate or does not
remain illuminated with
a BabySmart
TM child
seat properly installed
on the passenger seat.
The system is malfunctioning.Make sure there is nothing between
seat cushion and child seat.
Check installation of the child seat
(
page 93).
If the front passenger front air bag off indi-
cator lamp remains out:
Have the system checked at an autho-
rized Mercedes-Benz Center as soon as
possible.
Do not use the BabySmart
TM restraint to
transport children on the front passenger
seat until the system has been repaired.

463 Practical hints
What to do if …
Display messagePossible
cause/consequencePossible solution
(Vehicles with OCS*
only)
Front passenger airbag
enabled
See Operator’s Manual
Front passenger front air bag
is activated while driving even
though a child, small
individual, or object below the
system’s weight threshold is
on the front passenger seat,
or the front passenger seat is
empty. Objects on the seat or
forces acting on the seat may
make the system sense sup-
plemental weight.Stop the vehicle in a safe location as soon as possible and check the front
passenger seat for the following:
Apply the parking brake (page 68).
Switch off the ignition (page 42).
Remove child and child restraint from front passenger seat and properly
secure the child in rear seat employing the child restraint if necessary.
Remove any other items from on and around the front passenger seat
and make sure the storage bag on the back of the front passenger seat
is empty.
Make sure that no objects which apply forces to the seat are present
(e.g. objects such as books, briefcases etc. lodged behind or around the
seat, head restraints pushing against roof etc.). The system may recog-
nize such forces as supplemental weight and sense that an occupant on
the front passenger seat is of a greater weight than actually present.
Keep the seat unoccupied, close the front passenger door and switch
on the ignition (
page 42).
(Continued on next page)

464 Practical hints
What to do if …
Display messagePossible
cause/conse-
quencePossible solution
Monitor the 59indicator lamp on the center console (page 85) and
the multifunction display in the instrument cluster (
page 26) 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 enabled See Operator’s Manual or the
message
Front passenger airbag disabled See Operator’s Manual should not
appear in the multifunction display at any time the seat is unoccupied. Wait at
least 60 seconds for the system to complete the necessary check cycles 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 out even after performing the above
corrective steps, do not have any children
12 years old and under and other smallindividuals use the front passenger seat
until the system has been repaired.

530 Practical hints
Battery
The battery is located under the front
passenger seat.
The battery should always be sufficiently
charged in order to achieve its rated ser-
vice life.
If you use your vehicle mostly for
short-distance trips, you will need to have
the battery charge checked more
frequently.
When replacing the battery, always use
batteries approved by Mercedes-Benz.
If you do not intend to operate your vehicle
for an extended period of time, consult an
authorized Mercedes-Benz Light Truck
Center about steps you need to observe.Batteries contain materials that can harm
the environment if disposed of improperly.
Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
iMercedes-Benz recommends to have the
battery replaced at an authorized
Mercedes-Benz Light Truck Center.
Warning!G
Observe all safety instructions and precau-
tions when handling automotive batteries.
Risk of explosion.
Fire, open flames and smoking
are prohibited when handling
batteries. Avoid creating sparks.
Battery acid is caustic. Do not
allow it to come into contact
with skin, eyes or clothing.
Wear suitable protective cloth-
ing, especially gloves, apron and
faceguard.
Wear eye protection.
Rinse any acid spills immediate-
ly with clear water. Contact a
physician if necessary.
Keep children away.
Follow the instructions in this
Operator’s Manual.

572 Index
Children in the vehicle 93
Air bags 77, 93
Blocking rear door window
operation 100
Indicator lamp, Front passenger front
air bag 85, 87, 450
Infant and child restraint systems 88,
94
LATCH-type child seat anchors 97
Occupant Classification System*
(OCS) 81
Cigarette lighter* 324
Climate control 216
Air conditioning refrigerant 561
Air conditioning, Cooling 226, 227
Air distribution, Front 221
Air distribution, rear 229
Air recirculation mode 224
Air vents*, second-row seats 222
Air vents, Front 222
Air volume 222
Control panel*, Rear 228
Control panel, Front 218
Deactivating system 220
Defogging 224
Defrosting 223Rear window defroster 215
Residual engine heat (REST) 227
Clock 27, 176
Setting time 176
Cloth upholstery, Cleaning and
care of 434
Cockpit 24
Cockpit Management and Data System
see COMAND System
Cold tire inflation pressure 416
Collapsible wheel chock 498
COMAND System see separate operating
instructions
Combination switch 63, 65, 149
Compass 345
Adjustment 181
Calibration 182
Calling up the compass 345
Control and operation of radio
transmitters 372
Control system 157
Multifunction display 157
Multifunction steering wheel 158
Resetting to factory default 171Control system menus 157
Audio 166
DISTRONIC* 169
NAV* 168
Off-road 168
Settings 170
Standard display 164
TEL* 189
Trip computer 187
Vehicle configuration 185
Vehicle status message memory 169
Control system submenus 161, 163, 173
Comfort* 184
Instrument cluster 174, 175
Lighting 178
Time/Date 176
Vehicle 181
Coolant 382, 565
Anticorrosion/antifreeze mixing ratio
and quantity 566
Capacities 560
Checking coolant level 377, 382
Messages in the
multifunction display 473, 475
Temperature 374
Temperature display 164

578 Index
Headlamps
Automatic headlamp mode 146
Bi-Xenon* 481, 512
Cleaning lenses 429
Cleaning system* 210, 384
Halogen 511
High beam see High beam flasher
High beam see High beam headlamps
Light sensor, Messages in the
multifunction display 483
Low beam see Low beam headlamps
Manual headlamp mode 146
Messages in the
multifunction display 481, 482,
483, 484, 485, 486
Replacing bulbs 508, 509
Switch 62, 145
Heated seats see Seat heating*
Heated steering wheel* 328
Height adjustment
Vehicle level control
(Vehicles with Air suspension
package) 283
Vehicle level control
(Vehicles with enhanced Off-road
Package*) 285High beam flasher 63, 149
High beam headlamps
Indicator lamp 29
Messages in the
multifunction display 482
Replacing bulbs 509, 511, 512
Switching on 63, 149
High mounted brake lamp 509
Hill start assist system 199
Hinged quarter windows* see
Power windows
Hood 379
Messages in the
multifunction display 478
Opening 379
Hooks
Loading 306
Horn 25
HVAC see Climate control or
automatic climate control (3-zone)*
Hydroplaning 354I
Identification labels see Labels
Ignition 42, 44, 59
Immobilizer 111
Indicator lamps see Lamps, Indicator and
warning
Infant and child restraint systems see
Children in the vehicle
Inflation pressure see Tires,
Inflation pressures
Information button see Tele Aid
Infrared reflecting windshield* 345
Inside door handle 122
Instrument cluster 26, 28, 155
Illumination brightness 155
Lamps 436
Messages in display see Multifunction
display messages
Multifunction display 157
Outside temperature indicator 156
Selecting language 174
Instrument lighting see Instrument cluster,
Illumination brightness
Instrument panel see Instrument cluster

580 Index
Kickdown 198
Kilopascal 416
L
Labels 550
Certification 550
Emission control information 551
Engine number 551
Paintwork code 550
Vacuum line routing diagram 551
Vehicle Identification Number
(VIN) 550
Lamp sensor see Light sensor
Lamps, exterior 509
Front 509
Light sensor, Messages in the
multifunction display 483
Messages in display 481
Messages in the multifunction
display 481, 483, 485
Rear 509
Switch 145Lamps, indicator and warning
ABS 27, 436
Adaptive Damping System
(ADS)* 281
Alarm system 112
Battery (SmartKey with
KEYLESS-GO*) 121
Battery (SmartKey) 116
Brakes 27, 437, 438
Center console 31, 32, 448
CHECK ENGINE 29, 439, 440
Differential locks* 207
Distance warning lamp* 265
Downhill Speed Regulation 276
Engine diagnostics 29, 439, 440
ESP® 27, 441, 442
Fog lamps, Front/rear 145
Front passenger front air bag off 31,
32, 80, 87, 450
Fuel reserve 29, 442
High beam headlamps 29
Instrument cluster 26, 28, 436, 437,
438, 439, 440, 441, 442, 443, 444,
445, 446
Off-road driving program 280
Parktronic* 292Preglow indicator, Diesel engine 29
Seat belt telltale 29, 91, 443
Seat belts 444
Seat heating* 140
Seat ventilation* 142
SRS 29, 74, 91, 445
Turn signals 27
Vehicle level control 283, 285
Language, Setting 174
LATCH-type child seat anchors see
Children in the vehicle
Layout of poly-V-belt drive (GL 450) 552
Layout of poly-V-belt drive
(GL 320 CDI) 552
Leather upholstery*, Cleaning and
care of 434
Lever for cruise control 257
License plate lamps 518
Messages in the
multifunction display 483
Replacing bulbs 509, 518
Light alloy wheels, Cleaning 432
Light sensor
Messages in the
multifunction display 483
Lighter see Cigarette lighter*

582 Index
Multifunction display messages 451
ABS 453
Air suspension 490
Air suspension package* 490
Brake fluid 472
Brake lamps 481
Brake pads 470
Check engine 472
Coolant 475
Cruise control 454
Distronic* 455
Doors 478
Downhill Speed Regulation 470
EBP 471
Engine coolant 473, 475
Engine oil 476
ESP® 441
Fog lamps, Front 481
Fog lamps, Rear 484
Front passenger front air bag 463,
464, 465, 466
Fuel cap 478
Gear selector lever 461
Headlamps 481, 483, 484, 486
Hood 478Key, SmartKey 480
Key, SmartKey with
KEYLESS-GO* 479, 480
Lamps 481, 483, 484, 486
Low tire pressure 467, 488, 489
Parking brake 461, 471
Parking lamps 482
Tele Aid 487
Telephone* 487
Turn signals 486
Vehicle battery 469
Windshield washer fluid 487
Multifunction steering wheel 30, 158
Button operation 158
N
Navigation system* 168
See separate COMAND System
operating instructions
Net, Cargo* 313
Net, Parcel 320
Neutral gear position, Automatic
transmission 192
New vehicle, Break-in period 348
Night security illumination 148, 179
Normal occupant weight 417
Number, Vehicle Identification (VIN) 550O
Occupant distribution 417
Occupant safety 74
Active head restraint 92
Air bags 76
Children and air bags 77, 93, 96
Children in the vehicle 93
Fastening the seat belt 54
Front passenger front air bag off
indicator lamp 82, 85, 86
Infant and child restraint systems 94
LATCH-type child seat anchors 97
OCS* 81
OCS*, Messages in the multifunction
display 463, 464, 465, 466
Seat belts 54, 78
OCS* 81
Self-test 86
Odometer 156, 157, 164