104 Safety and SecurityAnti-theft systemsArming the alarm system
The alarm system is armed after you have
locked the vehicle with the SmartKey or
SmartKey with KEYLESS-GO*.
The alarm system indicator lamp is located
to the lower left of the hazard warning
flasher.
1Alarm system indicator lamp
Make sure all doors and the tailgate are
closed.
Lock the vehicle (
page 68).
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 (
page 38).
The turn signal lamps flash once to
indicate that the alarm system is
disarmed. Indicator lamp1 goes out.
i
If the alarm stays on for more than
30 seconds, a call to the Response Center is
initiated automatically by the Tele Aid* system
(
page 308) provided that the Tele Aid* service
was subscribed to and properly activated, and
that necessary cellular service and GPS cover-
age are available.
i
If 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.
i
The alarm system will rearm automatically
again after approximately 40 seconds if neither a
door nor the tailgate is opened.
105 Safety and Security
Anti-theft systems
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 41).
The SmartKey with KEYLESS-GO must
be inside the vehicle.
109 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 reactivate 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
activated
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.
i
USA 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 interfer-
ence, 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.
i
Canada 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.
i
You can also open and close the power
windows and tilt/sliding sunroof* using the
SmartKey, see “Summer opening feature”
(
page 239) and see “Convenience closing fea-
ture” (
page 239).
110 Controls in detailLocking and unlockingGlobal 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 buttonŒ only 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 108) flashes twice.
The SmartKey will then function as
follows:Unlocking driver’s door and fuel filler
flap
Press buttonŒ once.
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 buttonŒ twice.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The anti-theft alarm system is
disarmed.
Global 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.Restoring to factory setting
Press and hold buttonsŒ and‹
simultaneously for about 5 seconds
until battery check lamp5
(page 108) flashes twice.
!
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 480).
Use the mechanical key to unlock the
driver’s door (
page 475).
Lock the vehicle as described in the
“Practical hints” section (
page 476).
Have the vehicle battery and the vehicle
battery connections checked (
page 507).
If the SmartKey is malfunctioning, contact
Roadside Assistance or an authorized
Mercedes-Benz Light Truck Center.
115 Controls in detail
Locking and unlocking
Factory setting
Global unlocking
Grasp an outside door handle.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The anti-theft alarm system is dis-
armed.
The vehicle will lock again automatically
and reactivate the anti-theft alarm system
within approximately 40 seconds of
unlocking if
neither a door nor the tailgate is
opened
the central locking switch is not
activatedGlobal locking
Press the lock button on an outside
door handle (
page 68).
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 with
KEYLESS-GO so when you grasp the
driver’s door handle only the driver’s door
and the fuel filler flap unlocks.
Press and hold buttonsŒ and‹
simultaneously for about 5 seconds un-
til battery check lamp5 (
page 112)
flashes twice.
The SmartKey with KEYLESS-GO will
then function as follows:
Unlocking driver’s door and fuel filler
flap
Grasp the driver’s outside door handle.
All turn signal lamps flash once. The
locking knob in the driver’s door moves
up. The anti-theft alarm system is dis-
armed.
i
If the vehicle has been parked for more than
72 hours, you must pull an outside door handle
in order to activate the KEYLESS-GO function.
i
The vehicle could be inadvertently unlocked
if the SmartKey with KEYLESS-GO is within 3 ft
(1 m) of the vehicle and
an outside door handle is splashed with
water
or
you attempt to clean an outside door handle
116 Controls in detailLocking and unlockingGlobal unlocking
Grasp any outside door handle other
than the driver’s outside door handle.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The anti-theft alarm system is dis-
armed.
Global locking
Press the lock button on an outside
door handle (
page 68).
All turn signal lamps flash three times.
The locking knobs in the doors move
down. The anti-theft alarm system is
armed.Restoring to factory setting
Press and hold buttonsŒ and‹
simultaneously for about 5 seconds
until battery check lamp5
(page 112) flashes twice.Checking the batteries
Press button‹orŒ.
Battery check lamp5 (
page 112)
comes on briefly to indicate that the
SmartKey with KEYLESS-GO batteries
are in order.
!
If you can no longer lock or unlock the
vehicle with the SmartKey with KEYLESS-GO, the
batteries in the SmartKey are discharged, the
SmartKey with KEYLESS-GO is malfunctioning or
the vehicle battery is drained.
Check the batteries in the SmartKey with
KEYLESS-GO (
page 116) and replace
them if necessary (page 480).
Use the mechanical key to unlock the
driver’s door (
page 475).
Lock the vehicle as described in the “Practi-
cal hints” section (
page 476).
Have the vehicle battery and the vehicle
battery connections checked (
page 507).
If the SmartKey with KEYLESS-GO is malfunc-
tioning, contact an authorized Mercedes-Benz
Light Truck Center.
i
If battery check lamp5 (
page 112) does
not come on briefly during check, the SmartKey
with KEYLESS-GO batteries are discharged.
Replace the batteries (
page 480).
You can obtain the required batteries at any
authorized Mercedes-Benz Light Truck Center.
i
If the batteries are checked within signal
range of the vehicle, pressing the
button‹orŒ will lock or unlock the
vehicle accordingly.
118 Controls in detailLocking and unlockingOpening the doors from the inside
You can open a locked door from the in-
side. Open door only when conditions are
safe to do so.
1Locking knob
2Inside door handleFront doors
Pull on inside door handle2 on the
respective front door to open door.
If the door was locked, locking knob1
will move up.
Rear doors
Pull up locking knob1 on the respec-
tive rear door to unlock door.
Pull on inside door handle2 on the re-
spective rear door to open door.
i
If the vehicle has previously been locked
from the outside with the SmartKey or
KEYLESS-GO*, opening a door from the inside
will trigger the anti-theft alarm system.
To cancel the alarm, do one of the following:
With the SmartKey
Insert the SmartKey in the starter switch.
Press theŒ or ‹button on the
SmartKey.
With KEYLESS-GO*
Grasp an outside door handle.
Press the KEYLESS-GO start/stop button
(page 41).
The SmartKey with KEYLESS-GO must be
inside the vehicle.
125 Controls in detail
Locking and unlocking
Closing the tailgate and locking the
vehicle from the outside (vehicles with
KEYLESS-GO*)
In vehicles with power tailgate and
KEYLESS-GO*, you can close the tailgate
and lock the vehicle simultaneously from
the outside using the KEYLESS-GO*
locking/closing switch or the Šbutton
on the SmartKey with KEYLESS-GO*.
1KEYLESS-GO* locking/closing switch
Make sure you have the SmartKey with
KEYLESS-GO* with you.
Press KEYLESS-GO* locking/closing
switch1 briefly.
The tailgate closes automatically. Once
the tailgate is closed, the vehicle locks
if doors are closed. The turn signals
flash three times to confirm locking.
The locking knobs in the doors move
down. The anti-theft alarm system is
armed.
Warning!
G
Monitor the closing procedure carefully to
make sure no one is in danger of being in-
jured. To prevent possible personal injury,
always keep hands and fingers away from
the cargo compartment opening when clos-
ing the tailgate. Be especially careful when
small children are around. To stop the clos-
ing procedure, do one of the following:
Press KEYLESS-GO* locking/closing
switch1.
Press the Šbutton on the SmartKey
with KEYLESS-GO*.
Press or pull the remote tailgate switch
(on the driver’s door).
Even with the SmartKey with KEYLESS-GO*
removed from the vehicle, the tailgate
closing switch can be operated. Therefore,
do not leave children unattended in the ve-
hicle, or with access to an unlocked vehicle.
Unsupervised use of vehicle equipment may
cause an accident and/or serious personal
injury.
Warning!
G
Only drive with the tailgate closed as,
among other dangers such as blocked
visibility, exhaust fumes may enter the vehi-
cle interior.