MERCEDES-BENZ GL450 2007 X164 Owner's Manual

500 Practical hints
Unlocking/locking in an emergency
Unlocking the vehicle
If you cannot unlock the vehicle with the
SmartKey or KEYLESS-GO*, open the
driver’s door using the mechanical key.Removing the mechanical key
1Mechanical key locking tab
2Mechanical key
Move locking tab1 in direction of
arrow.
The mechanical key2 comes out.
Slide mechanical key2 out of the
housing.Unlocking the driver’s door
Insert mechanical key2 into the
driver’s door lock until it stops.
Turn mechanical key2 counterclock-
wise to position1 and hold it there.
Pull the door handle until the locking
knob moves up (
page 122).
The driver’s door is unlocked.
Pull the door handle once more to open
the driver’s door.
iUnlocking the driver’s door with the
mechanical key will trigger the anti-theft alarm
system.
To cancel the alarm, insert the SmartKey or
SmartKey with KEYLESS-GO* in the starter
switch.
1Unlocking
2Mechanical key

501 Practical hints
Unlocking/locking in an emergency
Locking the vehicle
If you cannot lock the vehicle with the
SmartKey or KEYLESS-GO*, lock the vehi-
cle carrying out the following steps.
Close the front passenger door, the
rear right door and the tailgate.
Open the driver’s door and the rear left
door.
Press the central locking switch on the
driver’s door (
page 130).
The locking knobs of the front passen-
ger door and the rear doors move
down.
If the vehicle battery is disconnected or
drained:
Press down the locking knobs of
the front passenger door and the
rear doors manually.
Exit the vehicle.
Close the driver’s door.
Enter the vehicle through the rear left
door.
Press down the locking knob of the
driver’s door.
Exit the vehicle.
Close the rear left door.
The vehicle is locked.
Fuel filler flap
Open the tailgate (page 124).
The fuel filler flap release is located behind
a cover in the right side trim panel of the
cargo compartment.
1Lock
2Cover
!To prevent inadvertent lockout, make sure
to have the SmartKey or SmartKey with
KEYLESS-GO* with you before proceeding with
the next step. The next step will lock the vehicle.
iThis procedure does not arm the anti-theft
alarm system, nor does it lock the fuel filler flap.


502 Practical hints
Unlocking/locking in an emergency
Insert a suitable object such as a coin
into the slot of lock1 (
page 501).
Turn lock1 counterclockwise by 90°
in direction of arrow.
Remove cover2 (page 501).
3Fuel filler flap release
Pull red fuel filler flap release3 in
direction of arrow.
The fuel filler flap is unlocked.
Open the fuel filler flap (page 375).


503 Practical hints
Opening/closing in an emergency
Opening/closing in an emergency
Power tilt/sliding sunroof*
You can open or close the tilt/sliding
sunroof manually should an electrical
malfunction occur.
The tilt/sliding sunroof drive is located
behind a cover on the overhead control
panel.
1Cover
Remove the SmartKey from the starter
switch.Vehicles with KEYLESS-GO*:
Turn off the engine by pressing the
KEYLESS-GO* start/stop button
(
page 70).
Open the driver’s door (this puts
the starter switch in position 0, same
as with the SmartKey removed from
the starter switch). The driver’s door
can then be closed again.
Press on cover1 at the position indi-
cated by the arrow.
Take off cover1.
2Crank
Take crank2 out of the Operator’s
Manual pouch.
Insert crank2 into hole.
Turn crank2 clockwise to

slide sunroof closed

raise sunroof at the rear
Turn crank2 counterclockwise to

slide sunroof open

lower sunroof at the rear
iThe hole may be covered by a noise
reduction padding. You will then have to push the
crank through the padding at the perforated
mark.
iTurn crank2 slowly and smoothly.
The tilt/sliding sunroof must be synchronized if
it has been operated manually (
page 255).

504 Practical hints
Resetting activated head restraints
If the active head restraints have been trig-
gered in a rear-end collision, the active
head restraints must be reset. Otherwise,
the active head restraints cannot offer any
additional protection in the event of anoth-
er rear-end collision.
You can tell that the head restraints have
been activated when they have been
moved forward and cannot be adjusted.
Take the reset tool out of the
Mercedes-Benz vehicle literature
pouch.1Reset tool
2Active head restraint
1Reset tool
2Active head restraint
3Rectangular opening
iFor your convenience, we recommend that
you have this work carried out by an authorized
Mercedes-Benz Light Truck Center.
You will find the reset tool for manually operating
the active head restraints in the Mercedes-Benz
vehicle literature pouch.
Warning!G
For safety reasons, have the active head re-
straints checked by an authorized
Mercedes-Benz Light Truck Center after a
rear-end collision.
Warning!G
When pushing back the head restraint cush-
ion, take care that your fingers do not be-
come caught between the head restraint
cushion and the cover. Failing to do so may
lead to injury.
!Be careful not to damage upholstery.

505 Practical hints
Resetting activated head restraints
Guide reset tool1 into rectangular
opening3 of active head restraint2.
Press reset tool1 downward in
direction of arrow until you hear the
head restraint release mechanism
audibly disengage.
Pull out reset tool1.
Firmly press the active head restraint
cushion backward towards the head
restraint cover in direction of arrow
until it engages.
Repeat this procedure on the active
head restraint for the second front
seat.
After resetting the active head
restraints store reset tool1 in the
Mercedes-Benz vehicle literature
pouch.
For information on active head restraints,
see “Active head restraint” (
page 92).
For information on head restraint adjust-
ment, see “Seats” (
page 45).

506 Practical hints
Replacing SmartKey batteries
If the batteries in the SmartKey or the
SmartKey with KEYLESS-GO* are dis-
charged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an autho-
rized Mercedes-Benz Light Truck Center.
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.Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove mechanical key1 from the
SmartKey or SmartKey with
KEYLESS-GO* (
page 500).1Mechanical key
2Battery compartment
Insert mechanical key1 into opening.
Press mechanical key1 in direction of
arrow.
The battery compartment2 is
unlatched.
Pull battery compartment2 out of the
SmartKey housing.
Warning!G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help
immediately.
iWhen inserting the batteries, make sure
they are clean and free of lint.
iWhen replacing batteries, always replace
both batteries.
The required replacement batteries are available
at any Mercedes-Benz Light Truck Center.

507 Practical hints
Replacing SmartKey batteries
3Batteries
4Contact spring
Pull out batteries3.
Using a line-free cloth, insert new
batteries3 under contact springs4
with the positive terminal (+) side
facing up.
Return battery compartment2 into
housing until it locks into place.
Slide mechanical key1 back into the
SmartKey or SmartKey with
KEYLESS-GO*.
Check the operation of the SmartKey
or SmartKey with KEYLESS-GO*.

508 Practical hints
Replacing bulbs
Bulbs
Safe vehicle operation depends on proper
exterior lighting and signaling. It is there-
fore essential that all bulbs and lamp as-
semblies are in good working order at all
times.
Correct headlamp adjustment is extremely
important. Have headlamps checked and
readjusted at regular intervals and when a
bulb has been replaced. See an authorized
Mercedes-Benz Light Truck Center for
headlamp adjustment.iIf the headlamps or front fog lamps are
fogged up on the inside as a result of high humid-
ity, driving the vehicle a distance with the lights
on should clear up the fogging.iSubstitute bulbs will be brought into use
when the following lamps malfunction:

Turn signal lamps

Brake lamps

Parking lamps

Tail lamps
Read and observe the messages in the multi-
function display (
page 481).

509 Practical hints
Replacing bulbs
Front lamps
Rear lamps
LampType
1Parking and standing
lampW5W
2Headlamps:
High beam/high beam
flasher
H7 (55 W)
Bi-Xenon headlamps*:
High beam/high beam
flasher spot lamp
H7 (55 W)
3Headlamps:
Low beam
H7 (55 W)
Bi-Xenon headlamps*:
Low beam1
1Vehicles with Bi-Xenon* headlamps: Do not re-
place the Bi-Xenon bulbs yourself. Contact an
authorized Mercedes-Benz Light Truck Center.
D2S-35 W
4Additional turn signal
lampLED
5Side marker lampWY 5 W
LampType
6Turn signal lamp3457 AK
S-8
(30/2.2 cp
bulb)
7Front fog lampH11 (55 W)
Corner-illuminating
front fog lamp*
H11 (55 W)
LampType
8High mounted brake
lamp
LED
9Backup lampP21W
aTail, brake, parking,
standing, side marker
lampP21/4W
bTurn signal lampPY 21 W
cRear fog lamp (driver’s
side only)P21/4W
dLicense plate lampsC5W