55 Getting started
Parking and locking
1Lock button on the door handle
After exiting the vehicle, press lock
button1 on the door handle or on the
trunk lid.
All turn signal lamps flash three times.
The locking knobs in the doors move
down. For more information, see “Locking and
unlocking” (
page 86).
!If you hear a warning signal you have
either
forgotten to switch off the vehi-
cles’s exterior lamps before open-
ing the driver’s door, or
tried to turn off the engine while the
gear selector lever is not inP.
Turn off the lights or place the gear se-
lector lever inP.
Warning!
G
To prevent possible personal injury, always
keep hands and fingers away from the door
openings when closing the doors. Be espe-
cially careful when small children are
around.
Before closing doors, make sure there is no
possibility of someone getting caught in a
door during closing.
iOpening a door causes the windows on
that side of the car to open slightly.
They will return to the up position when
the door is closed.
Warning!
G
When leaving the vehicle, always remove the
SmartKey from the starter switch, take the
SmartKey with KEYLESS-GO* with you, and
lock your vehicle. Do not leave children un-
attended in the vehicle, or with access to an
unlocked vehicle. Unsupervised use of vehi-
cle equipment may cause an accident
and/or serious personal injury.
82 Safety and SecurityAnti-theft systemsAnti-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
someone attempts to raise the vehicle
the vehicle is opened with the mechan-
ical key.Arming the alarm system
The alarm system is armed after locking
the vehicle with the SmartKey or
KEYLESS-GO*. The turn signal lamps flash
three times to indicate that the alarm sys-
tem is activated. The indicator lamp in the
switch for the tow-away alarm will flash af-
ter approximately 30 seconds when the
alarm system is completely armed
(
page 25).Disarming the alarm system
The alarm system is disarmed when you
unlock your vehicle with the SmartKey or
KEYLESS-GO*. The turn signal lamps flash
once to indicate that the alarm system is
deactivatediIf the alarm stays on for more than
20 seconds, an emergency call is initi-
ated automatically by the Tele Aid sys-
tem (
page 251) provided Tele Aid
service was subscribed to and properly
activated, and that necessary cellular
service and GPS coverage are avail-
able.
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
Close the respective element and lock
the vehicle again.
iThe alarm system will rearm automati-
cally again after approximately 40 sec-
onds if no door was opened.
87 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 vehicle will lock again automatically
within approximately 40 seconds of un-
locking if neither door nor trunk is opened,
the SmartKey is not inserted in the starter
switch, or if the central locking switch is
not activated.
Global locking
Press button‹.
All turn signal lamps flash three times.
The locking knobs in the doors move
down.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 lamp5 flashes
twice.
The SmartKey will then function as fol-
lows:
Unlocking driver’s door and fuel filler
flap
Press buttonŒ once.
Global unlocking
Press buttonŒ twice.
Global locking
Press button‹.Restoring to factory setting
Press and hold buttonsŒ and‹
simultaneously for about six seconds
until battery check lamp5 flashes
twice.Warning!
G
When leaving the vehicle, always remove the
SmartKey from the starter switch, take the
SmartKey with KEYLESS-GO* with you and
lock the vehicle. Do not leave children unat-
tended 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.
89 Controls in detail
Locking and unlocking
The trunk can also be opened from its in-
side in an emergency, see “Trunk lid emer-
gency release” (
page 103).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 immediately to your
car insurance company.
If necessary, have the mechanical lock
replaced.
Your authorized Mercedes-Benz Center
will be glad to supply you with a replace-
ment.
SmartKey with KEYLESS-GO*
Specially equipped vehicles come with two
SmartKeys with KEYLESS-GO, each with
remote control and a removable mechani-
cal key. The locking tabs for the mechani-
cal key portion of the two SmartKeys are a
different color to help distinguish each
SmartKey unit.
The KEYLESS-GO function is integrated
into the SmartKey. On these vehicles, the
validity of the SmartKey with KEYLESS-GO
is checked every time you pull a door
handle.
If the SmartKey with KEYLESS-GO* is valid,
your vehicle unlocks
the doors
the trunk lid
iIf the trunk lid does not open, it is still
locked separately (if applicable)
(page 104).
If the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
page 97). The
turn signals will flash three times to
confirm locking.
!To prevent possible malfunction, avoid
exposing the SmartKey with
KEYLESS-GO to high levels of electro-
magnetic radiation.
93 Controls in detail
Locking and unlocking
Locking the vehicle
1lock button at trunk
Press the lock button1.
or
Press the lock button at the driver’s
door (
page 55).
or
Vehicles with trunk lid opening/closing
system*, press the KEYLESS-GO lock-
ing/closing switch at the trunk lid
(page 102).
The vehicle locks. The turn signals
blinks three times to confirm locking.Checking the batteries
Press button‹ orŒ.
Battery check lamp5 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 with
KEYLESS-GO, then the batteries in the
SmartKey are discharged, the
SmartKey with KEYLESS-GO is mal-
functioning or the vehicle battery is
drained.
Check the batteries in the
SmartKey and replace them if nec-
essary (
page 345).
Use the mechanical key to unlock
the doors (
page 343) and the
trunk (
page 344).
Have the vehicle battery and the
battery connections checked.
Use the mechanical key to lock the
doors and the trunk (if applicable)
(page 344).
If the SmartKey with KEYLESS-GO is
malfunctioning, contact an authorized
Mercedes-Benz Center.
!If battery check lamp5 does not
come on briefly during check, then the
SmartKey batteries are discharged.
Replace the batteries (
page 345).
You can obtain the required batteries
at any authorized Mercedes-Benz Cen-
ter.
iIf the batteries are checked within sig-
nal range of the vehicle, pressing
the‹ orŒ button will lock or
unlock the vehicle accordingly.
94 Controls in detailLocking and unlockingUnlocking and opening the trunk lid
A minimum height clearance of 5.71 ft
(1.74 m) is required to open the trunk lid.
The handle is located in the rear license
plate recess.
1Handle
Pull on handle1.
The trunk opens.
or
Press and hold button Š until the
trunk unlocks and begins to open.The trunk can also be opened from its in-
side in an emergency, see “Trunk lid emer-
gency release” (
page 103).Closing the side windows and
sliding/pop-up roof*
Press and hold lock button at door
(page 55) until the side windows and
the sliding/pop-up roof* are closed.
!The trunk lid swings open upwards au-
tomatically. Always make sure there is
sufficient overhead clearance.
Vehicles with trunk lid opening/closing
system*: To stop the opening proce-
dure, press buttonŠ. The Trunk lid
stops moving.iIf the trunk lid does not open, it is still
locked separately (if applicable)
(page 104)
If the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
page 97). The
turn signals will flash three times to
confirm locking.
Warning!
G
When closing the windows and the
sliding/pop-up roof*, make sure there is no
danger of anyone being harmed by the clos-
ing procedure.
If potential danger exists, proceed as fol-
lows:
Release the lock button.
Pull on the door handle and hold firmly.
The side windows and the
sliding/pop-up roof* will open for about
two seconds if the door handle is held
but the door not opened.
97 Controls in detail
Locking and unlocking
Opening the trunk from the inside
You can open the trunk from the inside if
the vehicle is stationary.
A minimum height clearance of 5.71 ft
(1.74 m) is required to open the trunk lid.
The switch is located on the driver’s door.
1Remote trunk lid switch with indicator
lamp
Press remote trunk lid switch1.
The trunk lid opens. The indicator lamp
in the switch remains lit as long as the
trunk is open.The trunk can also be opened using the
SmartKey (
page 88) or from its inside in
an emergency, see “Trunk lid emergency
release” (
page 103).
Closing the trunk
1Handle
Lower trunk lid by pulling firmly on
handle1.
Close trunk lid with hands placed flat
on it.
!The trunk lid swings open upwards au-
tomatically. Always make sure there is
sufficient overhead clearance.iIf the trunk lid does not open, it is still
locked separately (if applicable)
(page 104)
If the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
page 97). The
turn signals will flash three times to
confirm locking.
Warning!
G
To prevent possible personal injury, always
keep hands and fingers away from the trunk
lid opening when closing the trunk. Be espe-
cially careful when small children are
around.
98 Controls in detailLocking and unlocking
Trunk lid opening/closing system*
Opening the trunk from the inside
You can open the trunk from the inside if
the vehicle is stationary.
A minimum height clearance of 5.71 ft
(1.74 m) is required to open the trunk lid.
The switch for opening and closing the
trunk is located on the driver’s door.
1Remote trunk lid opening switch
2Remote trunk lid closing switch
Press remote trunk lid opening
switch1 until the trunk lid begins to
open.The trunk lid opens. The indicator lamp
in the switch comes on and remains lit
until the trunk is closed.
Warning!
G
Only drive with the trunk closed. Among oth-
er dangers, such as your view being blocked,
exhaust fumes may enter the vehicle
interior.iDo not place the SmartKey in the open
trunk. You may lock yourself out.iVehicles with KEYLESS-GO*:
To prevent a possible inadvertent lock-
out, the trunk lid will open automatical-
ly if a SmartKey with KEYLESS-GO* is
recognized inside the vehicle or in the
trunk.
!The trunk lid swings open upwards au-
tomatically. Always make sure there is
sufficient overhead clearance. To stop
the opening procedure, press the re-
mote trunk lid opening or closing
switch.iIf the trunk lid does not open, it is still
locked separately (if applicable)
(page 104)
If the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
page 97). The
turn signals will flash three times to
confirm locking.