90 Safety and Security
Anti-theft systems
Arming tow-away alarm
When you lock your vehicle, the tow-away
alarm is automatically armed.
When you unlock your vehicle, the
tow-away protection disarms
automatically.
Disarming tow-away alarm
To prevent triggering the tow-away alarm
feature, switch off the tow-away alarm be-
fore towing the vehicle, or when parking on
a surface subject to movement, such as
a ferry or auto train.The switch is located on the center con-
sole.
1Tow-away alarm off switch
2Indicator lamp
Switch off the ignition and remove the
SmartKey from the starter switch.
Press upper half1 of the switch.
Indicator lamp2 in the switch comes
on briefly.
Lock your vehicle with the SmartKey.
The tow-away alarm remains disarmed un-
til you lock your vehicle again.
Canceling the tow-away alarm
To cancel the alarm:
Press the Œ or ‹ button on the
SmartKey.
or
Insert the SmartKey in the starter
switch.
i
You cannot disarm the tow-away alarm
when the ignition is switched on.
94 Controls in detail
Locking and unlocking
Factory setting
Global unlocking
Press buttonŒ.
All turn signal lamps flash once. The
locking knobs on the doors move up.
The anti-theft alarm system is dis-
armed.
The vehicle will lock again automatically
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 hood, tailgate and all doors
closed, all turn signal lamps flash three
times. The locking knobs on 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
pressingŒ only unlocks the driver’s
door and the fuel filler flap.
Press and hold buttonsŒ and‹
simultaneously for about five seconds
until battery check lamp4 blinks
twice.
The SmartKey will then function as
follows:Unlocking the driver’s door and fuel
filler flap
Press buttonŒ once.
All turn signal lamps flash once. The
locking knobs on the doors move up.
The anti-theft alarm system is
disarmed.
Global unlocking
Press buttonŒ twice.
All turn signal lamps flash once. The
locking knobs on the doors move up.
The anti-theft alarm system is
disarmed.
95 Controls in detail
Locking and unlocking
Global locking
Press button‹.
With the hood, tailgate and all doors
closed, all turn signal lamps flash three
times. The locking knobs on the doors
move down.
The anti-theft alarm system is armed.
Restoring to factory setting
Press and hold buttonsŒ and‹
simultaneously for about six seconds
until battery check lamp4 blinks
twice.Checking the batteries
Press button‹ orŒ.
Battery check lamp4 comes on brief-
ly to indicate that the SmartKey batter-
ies are in order.
!
If you can no longer lock or unlock the
vehicle with the SmartKey, then the
batteries in the SmartKey are dis-
charged, the SmartKey is malfunction-
ing or the vehicle battery is drained.
Check the batteries in the
SmartKey (
page 95) and replace
them if necessary (
page 333).
Use the mechanical key to unlock
the driver’s door (
page 327).
Have the vehicle battery and the
battery connections checked by an
authorized Mercedes-Benz Light
Truck Center (
page 353).
Use the mechanical key to lock the
driver’s door and the tailgate
(
page 328).
If the SmartKey is malfunctioning, con-
tact an authorized Mercedes-Benz
Light Truck Center.
!
If battery check lamp4 does not
come on briefly during check, then the
SmartKey batteries are discharged.
Replace the batteries (
page 333).
You can obtain the required batteries
at any authorized Mercedes-Benz Light
Truck Center.
i
If the batteries are checked within sig-
nal range of the vehicle, pressing the
button‹ orŒ will lock or unlock
the vehicle accordingly.
96 Controls in detail
Locking and unlocking
Loss of SmartKey or mechanical key
If you lose a SmartKey or mechanical key,
you should do the following:
Have the SmartKey deactivated by 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.
Your authorized Mercedes-Benz Light
Truck Center will be glad to supply you
with a replacement.
Opening 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 handlei
If the vehicle has previously been
locked with the SmartKey, opening a
door or the tailgate from the inside will
trigger the alarm.
To cancel the alarm do one the follow-
ing:
Press the Œ or ‹ button on
the SmartKey.
Insert the SmartKey in the starter
switch.
158 Controls in detail
Transfer case
Switching from LOW to HIGH
Press lower half (“HIGH”) of the trans-
fer case switch.
Once the shift is complete, gear
position
H is displayed in the transfer
case indicator.
Put gear selector in D.Messages in the multifunction display
If a shift was not completed and the multi-
function display shows one of the following
messages:
TC SHIFT CONDITIONS NOT FULFILLED
The shift did not take place. At least
one shift condition was not met.
Repeat the shift procedure.
TC IN NEUTRAL
The shift did not take place. The trans-
fer case is in neutral. The gear
position
N is displayed in transfer case
indicator1.
Repeat the shift procedure.
TC SHIFT – CANCELLED
The shift did not take place.
Repeat the shift procedure.
TRANSFER CASE – VISIT WORKSHOP!
There may be a malfunction in the
system.
Repeat the shift procedure.
If the shift procedure still does not take
place, have the vehicle checked at an
authorized Mercedes-Benz Light Truck
Center as soon as possible.
For more information, see “Practical hints”
section (
page 321).
!
The shift procedure can only be per-
formed when:
The engine is running.
The gear selector lever for the auto-
matic transmission is in positionN.
The vehicle is not at standstill.
The vehicle speed does not exceed
40 mph (70 km/h).
i
If the shift procedure does not take
place press lower half (“HIGH”) of the
transfer case switch again.
Warning!G
If TC is in neutral, transmission positionP
will not hold vehicle. The parking brake must
be applied to hold vehicle in place.
i
If the SmartKey is in starter switch
position0 or1, an alarm will sound if
the transfer case is in positionN and
the driver’s door is opened.
Engage transfer case to gear position
HIGH or LOW.
202 Controls in detail
Useful features
You can take and place telephone calls
using thes andt buttons on the
multifunction steering wheel. Use the con-
trol system for performing other telephone
functions (
page 146).
See separate operating manual for infor-
mation on how to operate the telephone.
Tele Aid The Tele Aid system
(Telematic Alarm Identification on
Demand)
The Tele Aid system consists of three
types of response:
Automatic and manual emergency
Roadside Assistance and
Information
The Tele Aid system is operational provid-
ing that the vehicle’s battery is charged,
properly connected, not damaged and cel-
lular and GPS coverage is available.
The speaker volume of a Tele Aid call can
be adjusted when using the volume control
on the multifunction steering wheel. To
raise, press buttonæ and to lower,
press buttonç.
To activate, press the SOS button, the
Roadside Assistance button• or
the Information button¡, depend-
ing on the type of response required.
!
The initial activation of the Tele Aid sys-
tem may only be performed by com-
pleting the subscriber agreement and
placing an acquaintance call using the
SOS button. Failure to complete either
of these steps will result in a system
that is not activated. If the system is
not activated, the indicator lamp in the
SOS button stays on after switching on
ignition and the message
TELE AID
EMERG. CALL – NOT ACTIVATED
will be
shown in the multifunction display for
approx. 10 seconds.
If you have any questions regarding ac-
tivation, please call the Response
Center at 1-800-756-9018 (in the USA)
or 1-888-923-8367 (in Canada).
204 Controls in detail
Useful features
Emergency calls
An emergency call is initiated
automatically:
following an accident in which the
emergency tensioning devices (ETDs)
or airbags deploy
if the anti-theft alarm or the tow-away
alarm stays on for more than
20 seconds. See anti-theft alarm sys-
tem (
page 88) and tow-away alarm
(
page 89)
An emergency call can also be initiated
manually by opening the cover next to the
interior rear view mirror labeled SOS, then
briefly pressing the button located under
the cover. See below for instructions on
initiating an emergency call manually.Once the emergency call is in progress, the
indicator lamp in the SOS button will begin
to flash. The message
EMERGENCY CALL –
CONNECTING CALL
appears in the multifunc-
tion display. When the connection is estab-
lished, the message
EMERGENCY CALL –
CALL CONNECTED
appears in the
multifunction display. All information rele-
vant to the emergency, such as the loca-
tion of the vehicle (determined by the GPS
satellite location system), vehicle model,
identification number and color are gener-
ated.
A voice connection between the Response
Center and the occupants of the vehicle
will be established automatically soon af-
ter the emergency call has been initiated.
When a voice connection is established the
audio system mutes and the message
TELE AID – EMERGENCY CALL ACTIVE ap-
pears in the multifunction display.The Response Center will attempt to deter-
mine more precisely the nature of the acci-
dent provided they can speak to an
occupant of the vehicle.
The Tele Aid system is available if:
it has been activated and is operation-
al. Activation requires a subscription
for monitoring services, connection
and cellular air time
the relevant cellular phone network
and GPS signals are available and pass
the information on to the Response
Center
i
Location of the vehicle on a map is only
possible if the vehicle is able to receive
signals from the GPS satellite network
and pass the information on to the
Response Center.
327 Practical hints
Unlocking/locking in an emergency
Unlocking/locking in an emergency
Unlocking the vehicle
If you cannot unlock the vehicle with the
SmartKey, open the driver’s door and the
tailgate using the mechanical key.
The passenger door cannot be unlocked
manually.
1Mechanical key locking tab
2Mechanical key
Move locking tab1 in direction of ar-
row and slide the mechanical key2
out of the housing.
Unlocking the driver’s door
Unlock the door with the mechanical
key. To do so, push the mechanical key
in the lock until it stops and turn it to
the left.Unlocking the tailgate
If you are unable to unlock the tailgate with
the SmartKey, open the tailgate with the
mechanical key as follows:
1Unlocking in an emergency
2Lock cylinder
3HandleInsert the mechanical key into lock
cylinder2.
Turn the mechanical key counterclock-
wise to position1 and release it.
Remove the mechanical key.
i
Unlocking your vehicle with the me-
chanical key will trigger the anti-theft
alarm system. To cancel the alarm, do
one of the following:
Press button Œ or ‹ on the
SmartKey.
Insert the SmartKey in the starter
switch.