106 Safety and SecurityAnti-theft systemsImmobilizer
The immobilizer prevents unauthorized
persons from starting your vehicle.
Activating
With the SmartKey
Remove the SmartKey from the starter
switch.
With KEYLESS-GO*
Turn off the engine by means of the
start/stop button on the gear selector
lever.
Open the driver’s door.Deactivating
With the SmartKey
Switch on the ignition (
page 38).
With KEYLESS-GO*
Start the engine by means of the
start/stop button on the gear selector
lever.
Anti-theft alarm system
Once the alarm system has been armed, a
visual and audible alarm is triggered when
someone opens:
a door
the trunk
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 using the
mechanical key
someone opens a door from the inside
i
In case the engine cannot be started (yet the
vehicle’s battery is charged), the system is not
operational. Contact an authorized
Mercedes-Benz Center or call
1-800-FOR-MERCedes (in the USA), or
1-800-387-0100 (in Canada).
i
If the alarm stays on for more than
30 seconds, a call to the Response Center is ini-
tiated automatically by the Tele Aid system*
(
page 294) provided Tele Aid service was sub-
scribed to and properly activated, and that nec-
essary cellular service and GPS coverage are
available.
107 Safety and Security
Anti-theft systems
Arming the alarm system
The indicator lamp located in the central
locking switch in the center console.
1Indicator lamp
Lock the vehicle with the SmartKey or
KEYLESS-GO*.
The turn signal lamps flash three times
to indicate that the alarm system is
armed. The indicator lamp1 begins to
flash after approximately 30 seconds
after arming the alarm system.Disarming the alarm system
Unlock the vehicle with the SmartKey
or KEYLESS-GO*.
The turn signal lamps flash once to
indicate that the alarm system is
disarmed.Canceling the alarm
With the SmartKey
Insert the SmartKey in the starter
switch.
or
Press button Œ or ‹ on the
SmartKey.
With KEYLESS-GO*
Pull 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 39).
The SmartKey with KEYLESS-GO must
be inside the vehicle.
i
If the turn signal lamps do not flash three
times, one of the following elements may not be
properly closed:
a door
the trunk
Close the respective element and lock the vehi-
cle again.
i
The alarm system will rearm automatically
after approximately 40 seconds if neither a door
nor the trunk was opened.
116 Controls in detailLocking and unlocking
when pressing the KEYLESS-GO
start/stop button or trying to lock
the vehicle with the outside door
handle the message
Key not rec-
ognized
appears in the multifunc-
tion display
with the engine running, the mes-
sage
Key not recognized
appears
in the multifunction display while
driving off.
Find the SmartKey with KEYLESS-GO or
change its present location immediate-
ly (e.g. place it on the front passenger
seat or insert it in shirt pocket).
If you have started the engine with the
KEYLESS-GO start/stop button, you
can turn it off again with:
the KEYLESS-GO start/stop button
the SmartKey with KEYLESS-GO in-
serted in the starter switch, when
the automatic transmission is in
positionP
Remember that the engine can be
started by anyone with a SmartKey
with KEYLESS-GO that is left inside the
vehicle.
Possibility 1: (One SmartKey with
KEYLESS-GO in the vehicle, one
SmartKey with KEYLESS-GO outside
the vehicle):
If you leave the SmartKey with
KEYLESS-GO behind when exiting and
locking the vehicle, no message
appears in the multifunction display.
Possibility 2: (One SmartKey with
KEYLESS-GO in the vehicle, no
SmartKey with KEYLESS-GO outside
the vehicle):
When exiting and trying to lock the ve-
hicle, the message
Key still in ve-
hicle
appears in the multifunction
display. The vehicle will not be locked.Factory setting
Global unlocking
Pull an outside door handle.
All turn signal lamps flash once.
An acoustic signal sounds once.
The locking knobs in the doors
move up.
The anti-theft alarm system is dis-
armed.
The vehicle will lock again automatically
and rearm the anti-theft alarm system
within approximately 40 seconds if:
neither a door nor the trunk is opened
the central locking switch is not acti-
vated
i
When unlocking or locking the vehicle with
the SmartKey or with the KEYLESS-GO function
an acoustic signal sounds. The acoustic signal is
activated at the factory. If you wish to deactivate
the feature, or adjust its signal volume, contact
an authorized Mercedes-Benz Center.
120 Controls in detailLocking and unlocking
Front doors
Pull on door handle2 on the respec-
tive front door to open door.
If door was locked, locking knob1 will
move up.
Rear 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 trunk
You can open the trunk if the vehicle is sta-
tionary.
A minimum height clearance of 5.90 ft
(1.80 m) is required to open the trunk lid.
i
If the vehicle has previously been locked
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:
Press button Œ or ‹ on the SmartKey
or SmartKey with KEYLESS-GO*.
Insert the SmartKey or SmartKey with
KEYLESS-GO* in the starter switch.
In vehicles with KEYLESS-GO*
Press the KEYLESS-GO* start/stop button
(page 39).
The SmartKey with KEYLESS-GO* must be
inside the vehicle.
Pull an outside door handle.
The SmartKey with KEYLESS-GO* must be
within 3 ft (1 m) of the vehicle.
i
If 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.
Warning!
G
Make sure the trunk is closed when the en-
gine is running and while driving. Among
other dangers, such as blocked visibility, ex-
haust fumes may enter the vehicle interior.
These fumes are damaging to your health.!
The trunk lid swings open upwards automat-
ically. Always make sure there is sufficient over-
head clearance.
123 Controls in detail
Locking and unlocking
Closing trunk from the inside
automatically*
In vehicles with trunk opening/closing sys-
tem* you can close the trunk from the in-
side using the remote trunk opening/
closing* switch.
1Remote trunk opening/closing* switch
Press switch1 until the indicator
lamp on the switch goes out and the
trunk is closed.To interrupt the closing procedure:
Release switch1.
Closing the trunk from the outside au-
tomatically*
Warning!
G
Maintain sight of trunk area while operating
the door mounted switch. Monitor the clos-
ing procedure carefully to m a k e s u r e t h a t n o
one is in danger of being injured.
To interrupt the closing procedure, press or
pull the door mounted remote trunk open-
ing/closing* switch.
Even with the SmartKey or SmartKey with
KEYLESS-GO* removed from the starter
switch or the SmartKey with KEYLESS-GO*
removed from the vehicle, the remote trunk
opening/closing* switch can be operated.
Therefore, do not leave children unattended
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.
i
If the trunk lid comes into contact with an
object while closing (e.g. luggage that has been
piled too high) in the upper motion sequence, the
closing procedure is stopped and the trunk re-
opens slightly.
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 trunk opening when closing the trunk.
Be especially careful when small children
are around. To stop the closing procedure,
do one of the following:
press button Š on the SmartKey or
SmartKey with KEYLESS-GO*
press or pull the remote trunk open-
ing/closing* switch (on the driver’s
door)
press the trunk closing switch
(page 124)
124 Controls in detailLocking and unlockingIn vehicles with trunk opening/closing sys-
tem* you can close the trunk separately
from the outside using the trunk closing
switch.
Vehicles without KEYLESS-GO*1Trunk closing switch
Vehicles with KEYLESS-GO*1Trunk closing switch
Press switch1 briefly.
The trunk closes.
press the KEYLESS-GO
locking/closing* switch (
page 125)
pull the trunk lid handle
Even with the SmartKey or SmartKey with
KEYLESS-GO* removed from the starter
switch or the SmartKey with KEYLESS-GO*
removed from the vehicle, the remote trunk
opening/closing* switch can be operated.
Therefore, do not leave children unattended
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.
i
If the trunk lid comes into contact with an
object while closing (e.g. luggage that has been
piled too high) in the upper motion sequence, the
closing procedure is stopped and the trunk re-
opens slightly.
125 Controls in detail
Locking and unlocking
Closing trunk and locking vehicle from
outside (vehicles with KEYLESS-GO*)
In vehicles with trunk opening/closing sys-
tem* and KEYLESS-GO, you can close the
trunk and lock the vehicle simultaneously
from the outside using the KEYLESS-GO
locking/closing switch.
1KEYLESS-GO locking/closing switch
Make sure you have the SmartKey with
KEYLESS-GO with you.
Press switch1 briefly.
With all doors closed:
The locking knobs in the doors
move down.
The trunk starts to close automati-
cally.
All turn signal lamps flash three
times to confirm locking once the
trunk has closed completely.
An acoustic signal sounds three
times.
The anti-theft alarm system is
armed.
Trunk emergency release
With the emergency release button, the
trunk can be opened from inside the trunk.
1Emergency release button
Briefly press emergency release
button1.
The trunk unlocks and the trunk opens.
i
If the trunk lid comes into contact with an
object while closing (e.g. luggage that has been
piled too high) in the upper motion sequence, the
closing procedure is stopped and the trunk re-
opens slightly.
i
The emergency release button unlocks and
opens the trunk while the vehicle is standing still
or in motion.
126 Controls in detailLocking and unlockingIllumination of the emergency release but-
ton:
The button will flash for 30 minutes af-
ter opening the trunk.
The button will flash for 60 minutes af-
ter closing the trunk.
Valet locking
1Neutral position
2Locked
Close the trunk (
page 122).
Remove the mechanical key from the
SmartKey (
page 436).
Insert the mechanical key in the trunk
lid lock.
i
The emergency release button does not
open the trunk, if the vehicle battery is dis-
charged or disconnected.
i
If the vehicle has previously been locked us-
ing the SmartKey or KEYLESS-GO*, opening the
trunk from the inside using the emergency re-
lease button will trigger the anti-theft alarm sys-
tem.
To cancel the alarm, do one of the following:
Insert the SmartKey or the SmartKey with
KEYLESS-GO* in the starter switch.
Press button Œ or ‹ on the SmartKey
or the SmartKey with KEYLESS-GO*.
In vehicles with KEYLESS-GO*:
Pull an outside door handle.
The SmartKey with KEYLESS-GO* must be
within 3 ft (1 m) of the vehicle.
Press the KEYLESS-GO* start/stop button
(page 39).
The SmartKey with KEYLESS-GO* must be
inside the vehicle.
i
To deny any unauthorized person access to
the trunk, e.g. when you valet park the vehicle,
lock it separately with the mechanical key. Leave
only the SmartKey or SmartKey with
KEYLESS-GO* less its mechanical key with the
vehicle.