Page 88 of 481
87 Safety and Security
Anti-theft systems
Anti-theft systems
Immobilizer
The immobilizer prevents unauthorized
persons from starting your vehicle.
Activating
Remove the SmartKey from the starter
switch.
Deactivating
Switch on the ignition (
page 36).
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 lid
the hood
the glove box
the storage compartment in the center
console
The alarm system will also be triggered
when
someone attempts to raise the vehicle
opening the vehicle with the
mechanical key
someone opens a door from the inside
someone opens the trunk lid with the
emergency release button
iStarting the engine will also deactivate
the immobilizer.
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).
iThe alarm will stay on, even if the acti-
vating element (e.g. a door) is immedi-
ately closed.iIf the alarm stays on for more than
30 seconds, a call to the Response
Center is initiated automatically by the
Tele Aid system (
page 273), provided
Tele Aid service was subscribed to and
properly activated, and that necessary
cellular service and GPS coverage are
available (
page 273).
Page 89 of 481
88 Safety and SecurityAnti-theft systemsArming the alarm system
Lock your vehicle with the SmartKey.
The turn signal lamps flash three times
to indicate that the alarm system is ac-
tivated.
The indicator lamp in the central lock-
ing switch starts flashing (
page 102).Disarming the alarm system
Unlock your vehicle with the SmartKey.
The turn signal lamps flash once to in-
dicate that the alarm system is dis-
armed.
Canceling the alarm
To cancel the alarm:
Press theŒ or‹button on the
SmartKey.
or
Insert the SmartKey in the starter
switch.
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.
iIf the turn signal lamps do not flash
three times, one of the following ele-
ments may not be properly closed:
a door
the trunk lid
the fuel filler flap
the glove box
the storage compartment under the
armrest
Close the respective element and lock
the vehicle again.
iThe tow-away protection alarm is trig-
gered, for example, if the vehicle is lift-
ed on one side.
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 273), provided
Tele Aid service was subscribed to and
properly activated, and that necessary
cellular service and GPS coverage are
available (
page 273).
Page 90 of 481
89 Safety and Security
Anti-theft systems
Arming tow-away alarm
Lock your vehicle with the SmartKey.
The tow-away alarm is automatically
armed after about 30 seconds.
Disarming tow-away alarm
To prevent triggering the tow-away alarm,
switch off the tow-away alarm feature 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 lower part of
the center console.
1Indicator lamp
2Tow-away alarm deactivation switch
Switch off the ignition (
page 36).
Remove the SmartKey from the starter
switch.
Press tow-away alarm deactivation
switch2.
Indicator lamp1 in the tow-away
alarm deactivation switch comes on
briefly.
Exit your vehicle.
Lock your vehicle with the SmartKey.
The tow-away alarm remains disarmed un-
til you lock your vehicle again.
Canceling tow-away alarm
To cancel the alarm:
Press theŒ or‹button on the
SmartKey.
or
Insert the SmartKey in the starter
switch.
iWhen you unlock your vehicle, the
tow-away protection disarms
automatically. The tow-away alarm
remains disarmed until you lock the
vehicle again.
iYou cannot disarm the tow-away alarm
while the ignition is switched on.
Page 93 of 481
92 Controls in detailIn 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 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.
For more information on unlocking and
locking, see (
page 34) and (
page 59).
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 differ-
ent 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 trunk lid
the fuel filler flap
the glove box
the storage compartment under the
armrest
SmartKey with remote control1
‹
Lock button
2
Š
Unlock button for the trunk lid
3Mechanical key locking tab
4ŒUnlock button
5Battery check lamp
6ÂPanic button (
page 80)
Page 95 of 481
94 Controls in detailLocking 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 (
page 87).
The vehicle will lock again automatically
and reactivate the anti-theft alarm system
within approximately 40 seconds of un-
locking if:
neither door nor trunk is opened
the SmartKey is not inserted in the
starter switch
the central locking switch is not
activated
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 inter-
ference received, including interfer-
ence 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 interfer-
ence, and
(2) this device must accept any inter-
ference received, including interfer-
ence that may cause undesired
operation of the device.
Any unauthorized modification to this
device could void the user’s authority
to operate the equipment.iYou can also open and close the
retractable hardtop using the
SmartKey* (
page 257).
Page 96 of 481
95 Controls in detail
Locking and unlocking
Global locking
Press button‹.
With the trunk 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
now (
page 87).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, the storage compartment under the
armrest, the glove box, and the fuel filler
flap.
Press and hold buttonsŒand‹
simultaneously for about 6 seconds.
Battery check lamp5 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 knob on the driver’s door
move up. The anti-theft alarm system is
disarmed (
page 87).Global unlocking
Press buttonΠtwice.
All turn signal lamps flash once.
The locking knobs on the doors move
up. The anti-theft alarm system is dis-
armed (
page 87).
Global locking
Press button‹.
With the trunk 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
now (
page 87).
iIf the turn signal lamps do not flash
three times, one of the following ele-
ments may not be properly closed:
a door
the trunk lid
the fuel filler flap
the glove box
the storage compartment under the
armrest
Close the respective element and lock
the vehicle again.
Page 97 of 481
96 Controls in detailLocking and unlockingRestoring to factory setting
Press and hold buttonsŒand‹
simultaneously for about 6 seconds.
Battery check lamp5 flashes twice.
The SmartKey is set to the factory set-
ting again.Unlocking the trunk lid
You can unlock and open the trunk lid sep-
arately.
Press and hold buttonŠ on the
SmartKey until the trunk lid unlocks.
For opening the trunk, see “Opening
the trunk” (
page 98).
!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 and replace them if nec-
essary (
page 398).
Use the mechanical key to lock/un-
lock the driver’s door (
page 394).
Use the mechanical key to lock/un-
lock the trunk lid as required
(page 395).
Have the vehicle battery and the
battery connections checked
(page 421).
If the SmartKey is malfunctioning, con-
tact an authorized Mercedes-Benz
Center.
iThe trunk lid can only be opened when
the vehicle is not in motion and the re-
tractable hardtop is fully opened or
closed.
Page 98 of 481
97 Controls in detail
Locking and unlocking
Checking the batteries
Press button‹orŒ.
Battery check lamp5 comes on brief-
ly to indicate that the SmartKey batter-
ies are in order.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 Center.
Report the loss of the SmartKey or the
mechanical key to your car insurance
company immediately.
If necessary have the mechanical lock
replaced.
Your authorized Mercedes-Benz Center
will be glad to supply you with a replace-
ment.
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.
1Inside door handle
2Locking knob
Pull on door handle1 of the desired
door.
If the door was locked, locking knob2
will move up.
iIf battery check lamp5 does not
come on briefly during check, then the
SmartKey batteries are discharged.
Replace the batteries (
page 398).
You can obtain the required batteries
at any authorized Mercedes-Benz
Center.
iIf the batteries are checked within sig-
nal range of the vehicle, pressing
button‹orŒ will lock or un-
lock the vehicle accordingly.