Page 90 of 426
88 Safety and SecurityAnti-theft systems
Press switch1.
Indicator lamp2 in switch comes on
briefly.
Exit and lock your vehicle with the
SmartKey.
The tow-away alarm remains disarmed
until you lock your vehicle again.
Canceling the alarm
To cancel the alarm:
Press theŒ or‹ button on the
SmartKey.
or
Insert the SmartKey in the starter
switch.
Page 92 of 426

90 Controls in detailIn the “Controls in detail” section you will
find detailed information on how to oper-
ate the equipment installed on your vehi-
cle. 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 giv-
en at the beginning of each segment.Locking and unlocking
For more information on locking and
unlocking, see “Getting started”
(page 32) and (
page 55).
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 control1‹ Lock button
2Mechanical key locking tab
3Œ Unlock button
4Battery check lamp
5Â Panic button* (
page 78)
iCanada only:
Only vehicles equipped with an
anti-theft alarm system* have
SmartKeys with integrated panic
button5.
Page 93 of 426

91 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
switched off.
The vehicle will lock again automatically
and reactivate 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
activatedGlobal locking
Press button‹.
All turn signal lamps flash three times.
The locking knobs in the doors move
down. The anti-theft alarm system* is
activated.
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 flashes
twice.
Warning!
G
When leaving the vehicle, always remove the
SmartKey from the starter switch and lock
the vehicle. Do not leave children unattend-
ed in the vehicle, or with access to an un-
locked vehicle. It is possible for children to
open a locked door from the inside, which
could result in an accident and/or serious
injury.!To prevent possible malfunction, avoid
exposing the SmartKey to high levels of
electromagnetic radiation.iYou can also open and close the power
windows (
page 217) and power
tilt/sliding sunroof* (
page 221) from
outside using the SmartKey.
Page 94 of 426

92 Controls in detailLocking and unlocking
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
switched off.
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
switched off.Global locking
Press button‹.
All turn signal lamps flash three times.
The locking knobs in the doors move
down. The anti-theft alarm system* is
activated.
Restoring to factory setting
Press and hold buttonsŒ and‹
simultaneously for about six seconds
until battery check lamp4 flashes
twice.
!If you can no longer lock or unlock the
vehicle with the SmartKey, then either
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 93) and replace
them if necessary (
page 331).
Use the mechanical key to unlock
the driver’s door (
page 326).
Use the mechanical key to lock the
driver’s door (
page 327).
Have the vehicle battery and the
battery connections checked
(page 347).
If the SmartKey is malfunctioning,
contact an authorized Mercedes-Benz
Center.
Page 96 of 426
94 Controls in detailLocking and unlockingRear doors
Pull up locking knob1 on the
respective rear door to unlock door.
Pull on door handle2 on the
respective rear door to open door.
Opening the tailgate
A minimum height clearance of 6.40 ft
(1.95 m) is required to open the tailgate.
The handle is located above the rear
license plate recess.
1Handle
The vehicle must be unlocked.
Pull on handle1.
Lift the tailgate.
Closing the tailgate
1Handle
Lower tailgate by pulling firmly on
handle1.
Close tailgate with hands placed flat on
it.
iIf the vehicle has previously been
locked from the outside with the
SmartKey, opening a door from the
inside will trigger the anti-theft alarm
system*.
To cancel the alarm, do one of the
following:
Press buttonŒ or‹ on the
SmartKey.
Insert the SmartKey in the starter
switch.
!Always make sure there is sufficient
overhead clearance.
Page 251 of 426

249 Controls in detail
Useful features
Stolen Vehicle Recovery services
In the event your vehicle was stolen:
Report the incident to the police.
The police will issue a numbered
incident report.
Pass this number on to the
Mercedes-Benz Response Center along
with your password issued to you when
you subscribed to the service.
The Response Center will then attempt
to covertly contact the vehicle’s
Tele Aid system. Once the vehicle is
located, the Response Center will
contact the local law enforcement and
you. The vehicle’s location will only be
provided to law enforcement.
Garage door opener*
The built-in remote control is capable of
operating up to three separately controlled
devices, for example garage door openers,
gate openers, or other devices compatible
with HomeLink
® or some other systems.
You can program the signal transmitter
buttons.
iThe remote door unlock feature is
available if the relevant cellular phone
network is available.
The SOS button will flash and the
message
Connecting call
will appear
in the multifunction display to indicate
receipt of the door unlock command.
Once the vehicle is unlocked, a
Response Center specialist will
attempt to establish voice contact with
the vehicle occupants.
If the tailgate recessed handle was
pulled for more than 20 seconds
before door unlock authorization was
received by the Response Center, you
must wait 15 minutes before pulling
the tailgate recessed handle again.
iWhen the anti-theft alarm or the
tow-away alarm stays on for more than
30 seconds, a call is initiated automat-
ically to the Response Center. See
anti-theft alarm system* (
page 85)
and tow-away alarm* (
page 87).
Page 328 of 426

326 Practical hintsUnlocking/locking in an emergencyUnlocking the vehicle
If you are unable to unlock the vehicle with
the SmartKey, open the driver’s door using
the mechanical key and the tailgate using
the emergency release.
Removing the mechanical key
1Mechanical key locking tab
2Mechanical key
Move locking tab1 in direction of
arrow.
Slide mechanical key2 out of the
housing.Unlocking the driver’s door
1Unlocking
Insert the mechanical key into the
driver’s door lock until it stops.
Turn the mechanical key counterclock-
wise to position1.
The driver’s door is unlocked.Unlocking and opening the tailgate
A minimum height clearance of 6.40 ft
(1.95 m) is required to open the tailgate.
The emergency release is located on the
inside of the tailgate.
1Release lever
2CoveriUnlocking the driver’s door with the
mechanical key will trigger the
anti-theft alarm system*.
To cancel the alarm, do one of the
following:
Press buttonŒ or‹ on the
SmartKey
Insert the SmartKey in the starter
switch
Page 329 of 426

327 Practical hints
Unlocking/locking in an emergency
Remove cover2 from the trim on the
tailgate.
Push release lever1 all the way to the
right.
Lift the tailgate.
Locking the vehicle
If you are unable to lock the vehicle with
the SmartKey, do the following:
Close the passenger doors and the
tailgate.
Press the central locking switch in the
center console (
page 96).
Check to see whether the locking
knobs on the passenger doors have
moved down.
If necessary push them down manually.
Except for the driver’s door, the vehicle
should now be locked.1Locking
Insert the mechanical key into the
driver’s door lock until it stops.
Turn the mechanical key clockwise to
position1.
The driver’s door is locked.
!Always make sure there is sufficient
overhead clearance.iIf the vehicle has previously been
locked from the outside using the
SmartKey, opening the tailgate from
the inside will trigger the anti-theft
alarm system*.
To cancel the alarm, do one of the
following:
Press buttonŒ or‹ on the
SmartKey
Insert the SmartKey in the starter
switch