2007 MERCEDES-BENZ GL450 bulb

Contents
Emission control .......................... 373
Coolant temperature .................... 374
At the gas station .............................. 375
Refueling ...................................... 375
Check regularly and
before a long trip.......................... 377
Engine compartment ......................... 379
Hood ............................................ 379
Engine oil ..................................... 381
Transmission fluid level ................ 382
Coolant level ................................ 382
Windshield/rear window
washer system and
headlamp cleaning system* ........ 384
Tires and wheels ................................ 385
Important guidelines .................... 385
Tire care and maintenance........... 386
Direction of rotation ..................... 388
Loading the vehicle ...................... 388
Recommended tire
inflation pressure ......................... 394
Checking tire inflation pressure ... 396
Tire labeling.................................. 406
Load identification ....................... 410
DOT, Tire Identification
Number (TIN) ............................... 410Maximum tire load ........................ 412
Maximum tire inflation pressure ... 412
Uniform Tire Quality Grading
Standards (U.S. vehicles) .............. 413
Tire ply material ............................ 415
Tire and loading terminology......... 415
Rotating tires ................................ 418
Winter driving ..................................... 420
Winter tires ................................... 420
Snow chains.................................. 421
Maintenance....................................... 422
Maintenance service indicator
message ....................................... 422
Calling up the maintenance
service indicator display ............... 424
Resetting the maintenance
service indicator ........................... 424
Vehicle care........................................ 425
Cleaning and care of the vehicle ... 425
Practical hints.................................. 435
What to do if … ................................... 436
Lamps in instrument cluster ......... 436
Lamp in center console ................ 448
Vehicle status messages in
the multifunction display .............. 451
Where will I find ...? ............................ 495
First aid kit.................................... 495
Vehicle tool kit.............................. 495
Spare wheel .................................. 499
Unlocking/locking in an emergency .. 500
Unlocking the vehicle ................... 500
Locking the vehicle ....................... 501
Fuel filler flap ................................ 501
Opening/closing in an emergency ..... 503
Power tilt/sliding sunroof* ........... 503
Resetting activated head restraints.... 504
Replacing SmartKey batteries ............ 506
Replacing bulbs .................................. 508
Bulbs............................................. 508
Replacing bulbs for front lamps .... 511
Replacing bulbs for rear lamps ..... 515
Adjusting headlamp aim ............... 518

378 Operation
At the gas station
Brake fluid
Coolant
For normal replenishing, use water (pota-
ble water quality).
For more information, see “Coolant level”
(
page 382) and see “Fuels, coolants, lu-
bricants” (
page 560).Windshield/rear window washer
system and headlamp cleaning
system*
For more information on refilling the wash-
er reservoir, see “Windshield/rear window
washer system and headlamp cleaning
system*” (
page 384).
Vehicle lighting
Check function and cleanliness. For infor-
mation on replacing light bulbs, see “Re-
placing bulbs” (
page 508).
For more information, see “Exterior lamp
switch” (
page 145).
Tire inflation pressure
For more information, see “Checking tire
inflation pressure” (
page 396).
!If you find that the brake fluid in the brake
fluid reservoir has fallen to the minimum mark or
below, have the brake system checked for brake
pad thickness and leaks immediately. Notify an
authorized Mercedes-Benz Light Truck Center
immediately. Do not add brake fluid as this will
not solve the problem. For more information, see
“Brake fluid” (
page 562).

435 Practical hints
What to do if …
Where will I find ...?
Unlocking/locking in an emergency
Opening/closing in an emergency
Resetting activated head restraints
Replacing SmartKey batteries
Replacing bulbs
Replacing wiper blades
Flat tire
Bleeding the fuel system
(diesel engine only)
Battery
Jump starting
Towing the vehicle
Fuses

436 Practical hints
What to do if …
Lamps in instrument clusterGeneral information:
If any of the following lamps in the instru-
ment cluster fails to come on during thebulb self-check when switching on the
ignition, have the respective bulb checked
and replaced if necessary.
ProblemPossible cause/consequenceSuggested solution
-The yellow ABS indicator lamp
comes on while the engine is
running.ABS has detected a malfunction and has
switched off. The BAS, ESP®, EBP and 4-ETS
are also switched off (see messages in multi-
function display).
The brake system is still functioning normally
but without the ABS available.
If the ABS control unit is malfunctioning,
other systems such as the navigation
system* or the automatic transmission may
also be malfunctioning.
Continue driving with added caution.
Wheels may lock during hard braking,
reducing steering capability.
Read and observe messages in the
multifunction display (
page 451).
Have the system checked at an
authorized Mercedes-Benz Light
Truck Center as soon as possible.
Failure to follow these instructions
increases the risk of an accident.
The charging voltage has fallen below
10 volts. The ABS has switched off.
The battery might not be charged sufficiently.When the voltage is above this value
again, the ABS is operational again and
the ABS indicator lamp should go out.
If the ABS indicator lamp does not go out:
Have the generator (alternator) and
the battery checked.

481 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
. 3rd brake lampThe high mounted brake lamp is
malfunctioning. This message
will only appear if a critical num-
ber of LEDs have stopped work-
ing.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Active headlamps
inoperativeThe active Bi-Xenon* headlamps
system is malfunctioning.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Brake lamp
LeftThe left brake lamp is malfunc-
tioning. A substitute bulb is
being used.Replace the bulb as soon as possible
(
page 515).
Brake lamp
RightThe right brake lamp is malfunc-
tioning. A substitute bulb is
being used.Replace the bulb as soon as possible
(
page 515).
Display malfunction
Visit workshopThe display for the lamps or the
system is malfunctioning.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Front foglamp
LeftThe left front fog lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 514).
Front foglamp
RightThe right front fog lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 514).

482 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
. Parking lamp
Front LeftThe front left parking lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 513).
Parking lamp
Front RightThe right front parking lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 513).
High beam
LeftThe left high beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 512).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
High beam
RightThe right high beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 512).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.

483 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
. License plate lamp
LeftThe left license plate lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 518).
License plate lamp
RightThe right license plate lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 518).
AUTO Light
inoperativeThe light sensor is malfunction-
ing. The headlamps switch on
automatically.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
To switch off the headlamps
(U. S. vehicles only):
In the control system, set lamp operation
to manual mode (
page 146).
Switch off the headlamps using the
exterior lamp switch (
page 145).
Low beam
LeftThe left low beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 511).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.

484 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
. Low beam
RightThe right low beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 511).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Marker lamp
Front LeftThe left front side marker lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 514).
Marker lamp
Front RightThe right front side marker lamp
is malfunctioning.Replace the bulb as soon as possible
(
page 514).
Foglamp
Rear LeftThe left rear fog lamp is malfunc-
tioning.Replace the bulb as soon as possible
(
page 515).
Reverse lamp
LeftThe left backup lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 515).
Reverse lamp
RightThe right backup lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 515).