Page 99 of 457
98 Safety and Security
Anti-theft systems
Tow-away alarm
Once the tow-away alarm is armed, a visual
and audible alarm will be triggered when
someone attempts to raise the vehicle.
Arming tow-away alarm
Lock the vehicle with the SmartKey
(
page 65).
The tow-away alarm is automatically
armed after approximately
30 seconds.Disarming tow-away alarm
To prevent triggering the tow-away alarm
feature, switch off the tow-away alarm
before towing the vehicle, or when parking
on a surface subject to movement, such as
a ferry or auto train.
The tow-away alarm off switch is located
on the upper part of the center console.
1Tow-away alarm off switch
2Indicator lamp
Switch off the ignition and remove the
SmartKey from the starter switch.
Press switch1.
Indicator lamp2 comes on briefly.
Exit and lock the vehicle with the
SmartKey (
page 65).
Canceling the tow-away alarm
Press theŒ or‹ button on the
SmartKey.
or
Insert the SmartKey in the starter
switch.
iYou cannot disarm the tow-away alarm
when the ignition is switched on.
iWhen you unlock the vehicle, the tow-away
protection disarms automatically.
The tow-away alarm remains disarmed until you
lock your vehicle again.
Page 100 of 457
99
Controls in detail
Locking and unlocking
Seats
Memory function
Lighting
Instrument cluster
Control system
Automatic transmission
Transfer case
Differential locks
Good visibility
Climate control
Power windows
Power tilt/sliding sunroof
Driving systems
Loading
Useful features
Page 101 of 457
100 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
basic 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.
For more information on locking and
unlocking, see the “Getting started”
section (
page 38) and (page 65).
Locking and unlocking
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
different 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
2Locking tab for mechanical key
3Mechanical key (
page 370)
4ΠUnlock button
5Battery check lamp
6Â Panic button (
page 87)
Page 102 of 457
101 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.
!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
(
page 103) and replace them if necessary
(
page 376).
Unlock the vehicle as described in the
“Practical hints” section (
page 370).
Lock the vehicle as described in the
“Practical hints” section (
page 371).
Have the vehicle battery and the vehicle
battery connections checked at an autho-
rized Mercedes-Benz Light Truck Center
(
page 396).
If the SmartKey is malfunctioning, contact an
authorized Mercedes-Benz Light Truck Center.
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.
Page 103 of 457
102 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
unlocking if
neither door nor tailgate is opened
the SmartKey is not inserted in the
starter switch
the central locking switch is not
activated
Global locking
Press button‹.
With the hood, tailgate and all doors
closed:
All 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 press-
ing 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 100) 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 knobs in the doors
move up.
The anti-theft alarm system is
disarmed.
iYou can also open or close the power
windows and tilt/sliding sunroof using the
SmartKey, see “Summer opening feature”
(
page 193) and see “Convenience closing fea-
ture” (
page 194).
Page 104 of 457
103 Controls in detail
Locking and unlocking
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.
Global locking
Press button‹.
With the hood, tailgate and all doors
closed:
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 6 seconds
until battery check lamp5
(
page 100) flashes twice.
Checking batteries in the SmartKey
Press button‹ orŒ.
Battery check lamp5 (
page 100)
comes on briefly to indicate that the
SmartKey batteries are in order.
Loss of the SmartKey
If you lose your SmartKey or mechanical
key, you should do the following:
Have the SmartKey deactivated at an
authorized Mercedes-Benz Light Truck
Center.
Report the loss of the SmartKey or the
mechanical key immediately to your
car insurance company.
If necessary, have the mechanical lock
replaced.
Any authorized Mercedes-Benz Light Truck
Center will be glad to supply you with a re-
placement.
iIf battery check lamp5 does not come on
briefly during check, the SmartKey batteries are
discharged.
Replace the batteries (
page 376).
You can obtain the required batteries at any
authorized Mercedes-Benz Light Truck Center.
iIf the batteries are checked within signal
range of the vehicle, pressing button‹
orΠwill lock or unlock the vehicle
accordingly.
Page 105 of 457
104 Controls in detail
Locking and unlocking
Opening the doors from the inside
You can open a locked door from the
inside. 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
respective rear door to unlock door.
Pull on inside door handle2 on the
respective rear door to open door.
iIf the vehicle has previously been locked
with the SmartKey, opening a door or the tailgate
from the inside will trigger the anti-theft alarm
system.
To cancel the alarm, do one the following:
Insert the SmartKey in the starter switch.
Press buttonŒ or‹ on the
SmartKey.iIf you hear a warning signal you have forgot-
ten to switch off the headlamps before opening
the driver’s door.
In addition the message
Switch off lights
appears in the multifunction display.
Switch off the headlamps.
!Failure to switch off the headlamps when
leaving the vehicle may result in a discharged
battery.
Page 106 of 457
105 Controls in detail
Locking and unlocking
Tailgate Opening the tailgate from the outside
1Lock cylinder
2Tailgate handle
Press lock cylinder1 and pull on
tailgate handle2.
Open the tailgate to the side.Opening the tailgate from inside
1Locking knob
2Inside door handle
Pull on inside door handle2 to open
the tailgate.
If the door was locked:
Pull up locking knob1 to unlock the
tailgate.
Pull on door handle2 to open the
tailgate.
Warning!G
The tailgate swings open to one side. Always
make sure there is sufficient clearance for
the tailgate.
Make sure the tailgate is closed when the
engine is running and while driving. Among
other dangers, deadly carbon monoxide
(CO) gases may enter vehicle interior result-
ing in unconsciousness and death.
iThe vehicle must be unlocked (page 38).
