2007 MERCEDES-BENZ GL450 door lock

72 Getting started
Parking and locking
Locking with the SmartKey
Press lock button‹ on the
SmartKey (
page 40).
With the tailgate and all doors closed,
the turn signal lamps flash three times.
The locking knobs on the doors move
down. The anti-theft alarm system is
armed.
For more information, see “Locking and
unlocking” (
page 114).Locking with KEYLESS-GO*
1Lock button on the outside door handle
Press lock button1 on an outside
door handle.
With the tailgate and all doors closed,
the turn signal lamps flash three times.
The locking knobs on the doors move
down. The anti-theft alarm system is
armed.
For more information, see “Locking and
unlocking” (
page 114).

94 Safety and Security
Occupant safety
Infant and child restraint systems
We recommend all infants and children be
properly restrained at all times while the
vehicle is in motion.
Vehicles with BabySmart
TM air bag
deactivation system, Canada only:
Only use a BabySmart
TM compatible child
restraint for the front passenger seat in
this vehicle.
All lap-shoulder belts except the driver’s
seat belt have special seat belt retractors
for secure fastening of child restraints.
To fasten a child restraint, follow child
restraint instructions for mounting. Then
pull the shoulder belt out completely and
let it retract. During seat belt retraction, a
ratcheting sound can be heard to indicate
that the special seat belt retractor is acti-
vated. The belt is now locked. Push down
on child restraint to take up any slack.
To deactivate, release seat belt buckle and
let seat belt retract completely. To deacti-
vate the special seat belt retractor for the
front passenger seat, the front passenger seat must be in the most backward posi-
tion. The seat belt can again be used in the
usual manner.
The use of infant or child restraints is re-
quired by law in all 50 states, the District
of Columbia, the U.S. territories and all
Canadian provinces.
Do not expose the child restraint system to
direct sunlight. The child restraint system’s
metal parts, for example, could become very
hot, and the child could be burned on these
parts.
If children open a door, they could

injure other persons

get out of the car and injure themselves
or be injured by following traffic
Do not carry heavy or hard objects in the
passenger or cargo compartment unless
they are firmly secured in place. For more in-
formation, see “Loading” (
page 297) and
“Useful features” (
page 316).
Unsecured or improperly positioned cargo
increases a child’s risk of injury in the event
of

strong braking maneuvers

sudden changes of direction

an accident
Warning!G
Never release the seat belt buckle while the
vehicle is in motion, since the special seat
belt retractor will be deactivated.
iFor information on child seats with mounting
fittings for tether anchorages, see “Installation
of infant and child restraint system”
(
page 99).
For information on LATCH-type child seat
mounts, see “Child seat anchors – LATCH type”
(
page 97).


100 Safety and Security
Occupant safety
Securely fasten hook3, which is part
of the tether strap4, to anchorage
ring2.
Make sure

the top tether strap is not twisted

the head restraint is installed and
positioned such that the top tether
strap can pass freely between the
head restraint and top of seat back-
rest

top tether strap is positioned be-
tween the seat backrest and the
cargo compartment cover blind (if
installed)

the top tether strap is positioned
between the seat backrest and the
cargo net* (if installed)
Lower the head restraint if necessary
(
page 137).
Make sure the top tether strap can
pass freely between the head restraint
and top of seat backrest.
Install the child restraint system and
tighten the top tether strap according
to the child restraint manufacturer’s in-
structions.
Blocking of rear door window operation
With the override switch you can disable
the rear side window switches in the rear
door panels.
Warning!G
After installing top tether straps, make sure
that the seat backrests are in an upright po-
sition and are properly locked. Check for
secure locking by pushing and pulling on the
seat backrests. If a seat backrest is not
properly locked, the seat backrest could
fold. The child seat would no longer be prop-
erly supported or positioned to provide its
intended benefit.
Warning!G
Activate the override switch when children
are riding in the back seats of the vehicle.
The children could otherwise injure them-
selves, e.g. by becoming trapped in the win-
dow opening.
When leaving the vehicle, always remove the
SmartKey or SmartKey with KEYLESS-GO*
from the starter switch, take it with you, and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. A child’s unsupervised
access to a vehicle could result in an
accident and/or serious personal injury.

111 Safety and Security
Anti-theft systems
Anti-theft systems
Immobilizer
The immobilizer prevents unauthorized
persons from starting your vehicle.
Activating
With the SmartKey
Remove the SmartKey from the starter
switch.
With KEYLESS-GO*
Press the KEYLESS-GO start/stop
button (
page 43) on the starter
switch once.
The engine is turned off.
Open the driver’s door.
Deactivating
With the SmartKey
Turn the SmartKey in the starter switch
to position2 (
page 41).With KEYLESS-GO*
Switch on the ignition (page 42).
Anti-theft alarm system
Once the alarm system has been armed, a
visual and audible alarm is triggered when
someone opens

a door

the tailgate

the hood
The alarm will stay on, even if the activat-
ing element (a door, for example) is imme-
diately closed.The alarm system will also be triggered
when

the vehicle is opened with the mechan-
ical key, see “Unlocking the vehicle”
(
page 500)

a door is opened from the inside, see
“Opening the doors from the inside”
(
page 122)
iStarting the engine will also deactivate the
immobilizer.
In case the engine cannot be started (yet the
vehicle’s battery is charged), the system is not
operational. Contact an authorized
Mercedes-Benz Light Truck Center or call
1-800-FOR-MERCedes (in the USA), or
1-800-387-0100 (in Canada).
iIf the alarm stays on for more than
30 seconds, a call to the Response Center is
initiated automatically by the Tele Aid system
(
page 332) provided that the Tele Aid service
was subscribed to and properly activated, and
that necessary cellular service and GPS cover-
age are available.

112 Safety and Security
Anti-theft systems
Arming the alarm system
The alarm system indicator lamp is located
to the lower left of the hazard warning
flasher.
1Alarm system indicator lamp
Lock the vehicle with the SmartKey or
with KEYLESS-GO* (
page 71).
The turn signal lamps flash three times
to indicate that the vehicle is locked.
The alarm system is armed within ap-
proximately 10 seconds. Alarm system
indicator lamp1 flashes.Disarming the alarm system
Unlock the vehicle with the SmartKey
or with KEYLESS-GO* (
page 40).
The turn signal lamps flash once to
indicate that the alarm system is
disarmed. Indicator lamp1 goes out.Canceling the alarm
To cancel the alarm:
With the SmartKey
Insert the SmartKey in the starter
switch.
or
Press theŒ or ‹button on the
SmartKey.
With KEYLESS-GO*
Grasp an outside door handle.
The SmartKey with KEYLESS-GO must
be within 3 ft (1 m) of the vehicle.
or
Press the KEYLESS-GO start/stop
button (
page 43).
The SmartKey with KEYLESS-GO must
be inside the vehicle.
iIf the turn signal lamps do not flash three
times, one of the following elements may not be
properly closed:

a door

the tailgate
Close the respective element and lock the
vehicle again.
iThe alarm system will rearm automatically
again after approximately 40 seconds if neither a
door nor the tailgate is opened.

114 Controls in detail
In the “Controls in detail” section you will
find detailed information on how to oper-
ate the equipment installed in your vehicle.
If you are already familiar with the basic
functions of your vehicle, this section will
be of particular interest to you.
To quickly familiarize yourself with the ba-
sic functions of the vehicle, refer to the
“Getting started” section of this manual.
The corresponding page numbers are
given at the beginning of each segment.
Locking and unlocking
For more information on locking and un-
locking, see the “Getting started” section
(
page 40) and (page 71).
SmartKey
Your vehicle comes supplied with two
SmartKeys, each with remote control and a
removable mechanical key.
The locking tabs for the mechanical key
portion of the two SmartKeys are a differ-
ent color to help distinguish each
SmartKey unit.
The SmartKey provides an extended oper-
ating range. To prevent theft, however, it is
advisable to only unlock the vehicle when
you are in close proximity to it.
The SmartKey centrally locks and unlocks:

the doors

the tailgate

the fuel filler flap
SmartKey with remote control
1‹ Lock button
2Š Unlock button* for tailgate
3Locking tab for mechanical key
4ΠUnlock button
5Battery check lamp
6Â Panic button (
page 102)

115 Controls in detail
Locking and unlocking
Warning!G
When leaving the vehicle, always remove the
SmartKey from the starter switch, take it
with you and lock the vehicle. Do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. It is possible
for children to open a locked door from the
inside, which could result in an accident
and/or serious personal injury.
!To prevent possible malfunction, avoid
exposing the SmartKey to high levels of electro-
magnetic radiation.
iUSA only:
This device complies with Part 15 of the
FCC Rules. Operation is subject to the following
two conditions:
(1) This device may not cause harmful
interference, and
(2) this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
iCanada only:
This device complies with RSS-210 of Industry
Canada. Operation is subject to the following
two conditions:
(1) This device may not cause interference, and
(2) this device must accept any interference
received, including interference that may
cause undesired operation of the device.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
iYou can also open and close

the door windows

the hinged quarter windows*

the tilt/sliding sunroof*
using the SmartKey, see “Summer opening fea-
ture” (
page 251) and see “Convenience clos-
ing feature” (
page 252).
!If you cannot lock or unlock the vehicle with
the SmartKey, the batteries in the SmartKey are
discharged, the SmartKey is malfunctioning, or
the vehicle battery is drained.

Check the batteries in the SmartKey and
replace them if necessary (
page 506).

Use the mechanical key to unlock the
driver’s door (
page 500).

Lock the vehicle as described in the
“Practical hints” section (
page 501).

Have the vehicle battery and the vehicle
battery connections checked (
page 530).
If the SmartKey is malfunctioning, contact
Roadside Assistance or an authorized
Mercedes-Benz Light Truck Center.

116 Controls in detail
Locking and unlocking
Factory setting
Global unlocking
Press buttonŒ.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The anti-theft alarm system is
disarmed.
The vehicle will lock again automatically
and rearm the anti-theft alarm system
within approximately 40 seconds of un-
locking if

neither door nor tailgate is opened

the SmartKey is not inserted in the
starter switch

the central locking switch is not
activatedGlobal locking
Press button‹.
With the tailgate and all doors closed,
the turn signal lamps flash three times.
The locking knobs in the doors move
down. The anti-theft alarm system is
armed.
Selective setting
If you frequently travel alone, you may wish
to reprogram the SmartKey so that
pressing buttonΠonly unlocks the
driver’s door and the fuel filler flap.
Press and hold buttonsŒ and‹
simultaneously for about 5 seconds
until battery check lamp5
(
page 114) flashes twice.
The SmartKey will then function as
follows:Unlocking driver’s door and fuel filler
flap
Press buttonΠonce.
All turn signal lamps flash once. The
locking knob in the driver’s door moves
up. The anti-theft alarm system is
disarmed.
Global unlocking
Press buttonΠtwice.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The anti-theft alarm system is
disarmed.