105 Controls in detail
Locking and unlocking
To lock or unlock the vehicle, the
SmartKey with KEYLESS-GO must be
located outside the vehicle within ap-
proximately 3 ft (1 m) of the door to be
opened or the trunk lid.
In order to start the engine with the
SmartKey with KEYLESS-GO:
The SmartKey with KEYLESS-GO
must be located in the vehicle.
All doors must be closed.
The brake pedal must be firmly de-
pressed. Do not depress the accel-
erator.
If the SmartKey with KEYLESS-GO is
positioned farther away from the vehi-
cle, the system may no longer recog-
nize the SmartKey with KEYLESS-GO.
The vehicle then cannot be locked or
the engine started via the KEYLESS-GO
system.
If the SmartKey with KEYLESS-GO is re-
moved from the vehicle (e.g. if passen-
ger exits the vehicle with the SmartKey
with KEYLESS-GO).
with the starter switch position1,
the message:Key not recognizedappears in the multifunction display
with the engine running, the
message:Key not recognizedappears 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
(page 35), you can turn it off again
with:
the KEYLESS-GO start/stop button
the SmartKey inserted in the starter
switch, when the gear selector le-
ver 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 ap-
pears 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 messageKey recognized in vehiclewill appear in the multifunction display.
The vehicle will not be locked.
106 Controls in detailLocking and unlockingFactory settingGlobal unlocking
Pull an outside door handle (SmartKey
with KEYLESS-GO must be near this
door).
All turn signal lamps flash once.
An acoustic signal sounds once (if
equipped and feature activated).
The locking knobs in the doors
move up.
The anti-theft alarm system is dis-
armed.The vehicle will lock again automatically
and reactivate the anti-theft alarm system
within approximately 40 seconds of un-
locking if:
neither a door nor the trunk is opened.
the central locking switch is not
activated.
iYour vehicle may be equipped with an
acoustic lock and unlock confirmation
signal feature. If your vehicle is
equipped with this feature and the fea-
ture is activated, an acoustic signal will
sound when the vehicle is locked or un-
locked using the SmartKey.
To determine whether or not your vehi-
cle is equipped with this feature, con-
tact an authorized Mercedes-Benz
Center. If equipped and you wish to ac-
tivate or deactivate the feature, or ad-
just its signal volume, also contact an
authorized Mercedes-Benz Center.
iIf the vehicle has been parked for a
longer period of time, you must pull an
outside door handle in order to activate
the KEYLESS-GO function.
iThe vehicle could inadvertently be
unlocked if the SmartKey with
KEYLESS-GO is within 3 ft (1 m) of the
vehicle and:
an outside door handle is splashed
with water, or
you attempt to clean an outside
door handle.
107 Controls in detail
Locking and unlocking
Global locking
Press the lock button on an outside
door handle (
page 60) or the trunk
lid (
page 109).
With the trunk and both doors closed:
All turn signal lamps flash three
times.
An acoustic signal sounds three
times (if equipped and feature acti-
vated).
The locking knobs in 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 with
KEYLESS-GO so when you, pull the driver’s
door handle only the driver’s door and the
fuel filler flap unlocks.
Press and hold buttonsŒ and‹
simultaneously for about 6 seconds un-
til battery check lamp5 flashes twice.
The SmartKey with KEYLESS-GO will
then function as follows:
Unlocking driver’s door and fuel filler
flap
Pull the driver’s door handle.
All turn signal lamps flash once.
An acoustic signal sounds once (if
equipped and feature activated).
The locking knob in the driver’s
door move up.
The anti-theft alarm system is dis-
armed.Global unlocking
Pull the door handle on the passenger
side.
All turn signal lamps flash once.
An acoustic signal sounds once (if
equipped and feature activated).
The locking knobs in the doors
move up.
The anti-theft alarm system is dis-
armed.
Global locking
Press the lock button on an outside
door handle.
With the trunk and both doors closed:
All turn signal lamps flash three
times.
An acoustic signal sounds three
times (if equipped and feature acti-
vated).
108 Controls in detailLocking and unlocking
The locking knobs in the doors
move down.
The anti-theft alarm system is
armed.
Restoring to factory setting
Press and hold buttonsŒ and‹
simultaneously for about 6 seconds un-
til battery check lamp5 flashes twice.Checking the batteries
Press button‹orŒ.
Battery check lamp5 comes on
briefly to indicate that the SmartKey
with KEYLESS-GO batteries are in or-
der.
iYou can also lock the vehicle using the
lock button on the trunk lid
(page 109) or, vehicles with trunk
opening/closing system*,
KEYLESS-GO locking/closing switch
(page 117).
!If you can no longer lock or unlock the
vehicle with the SmartKey with
KEYLESS-GO, then the batteries in the
SmartKey with KEYLESS-GO are dis-
charged, the SmartKey with
KEYLESS-GO is malfunctioning or the
vehicle battery is drained.
Check the batteries in the
SmartKey with KEYLESS-GO
(page 108) and replace them if
necessary (
page 409).
Use the mechanical key to unlock
the driver’s door (
page 404) and
the trunk (
page 405).
Use the mechanical key to lock the
driver’s door (
page 405) and the
trunk (
page 119).
Have the vehicle battery and the
battery connections checked
(page 426).
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 with KEYLESS-GO batteries
are discharged.
Replace the batteries (
page 409).
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
the‹orŒ button will lock or
unlock the vehicle accordingly.
109 Controls in detail
Locking and unlocking
Global locking using the lock button on
the trunk lid
1Lock button
Press lock button1 on the trunk lid.With the trunk and both doors closed:
All turn signal lamps flash three
times.
An acoustic signal sounds three
times (if equipped and feature acti-
vated).
The locking knobs in the doors
move down.
The anti-theft alarm system is
armed.Unlocking and opening the trunk
You can unlock and open the trunk sepa-
rately.
A minimum height clearance of 5.71 ft
(1.74 m) is required to open the trunk lid.
Press and hold button Š until trunk
unlocks and begins to open.
The trunk can also be opened from its in-
side in an emergency, see “Trunk emer-
gency release” (
page 118).
iTo prevent a possible inadvertent
lockout, the trunk will open
automatically if a SmartKey with
KEYLESS-GO* is recognized inside the
vehicle or in the trunk.
iYou can also lock the vehicle using the
lock button on an outside door handle
(page 60) or, vehicles with trunk
opening/closing system*,
KEYLESS-GO locking/closing switch
(page 117).
!The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.
Vehicles with trunk opening/closing
system*: To stop the opening proce-
dure, press button Š. The trunk lid
stops moving.iIf the trunk does not open, it is still
locked separately (
page 119).
111 Controls in detail
Locking and unlocking
Pull on door handle2.
If door was locked, locking knob1 will
move up.
Opening the trunk
Opening the trunk from the outside
A minimum height clearance of 5.71 ft
(1.74 m) is required to open the trunk lid.
Vehicles without KEYLESS-GO*:
The vehicle must be unlocked.
The handle is located in the rear license
plate recess.
1Handle
Pull on handle1.
The trunk opens.
iIf you open a door, the side windows on
that side of the vehicle will lower slight-
ly. The windows close again when you
close the door.
!The trunk lid swings open upwards au-
tomatically. Always make sure there is
sufficient overhead clearance.
Vehicles with trunk opening/closing
system*: To stop the opening proce-
dure, press button Š on the Smart-
Key or SmartKey with KEYLESS-GO*.iIf the trunk does not open, it is still
locked separately (
page 119).
iThe trunk can also be opened using
buttonŠ on the SmartKey or
SmartKey with KEYLESS-GO* or from
its inside in an emergency, see “Trunk
emergency release” (
page 118).
112 Controls in detailLocking and unlockingOpening 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 remote trunk opening switch is locat-
ed on the driver’s door (vehicles without
trunk opening/closing system*).
1Remote trunk opening switchThe remote trunk opening switch and the
trunk closing switch are located on the
driver’s door (vehicles with trunk open-
ing/closing system*).
1Remote trunk opening switch*
2Remote trunk closing switch*
Press remote trunk opening switch1
until the trunk begins to open.
The trunk opens. The indicator lamp
comes on and remains lit until the
trunk is closed.
!The trunk lid swings open upwards au-
tomatically. Always make sure there is
sufficient overhead clearance.
Vehicles with trunk opening/closing
system*: To stop the opening proce-
dure, press switch1 or 2.iIf the trunk does not open, it is still
locked separately (
page 119).
iThe trunk can also be opened using
buttonŠ on the SmartKey
SmartKey with KEYLESS-GO* or from
its inside in an emergency, see “Trunk
emergency release” (
page 118).
113 Controls in detail
Locking and unlocking
Closing the trunk
Closing the 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 closing*
switch.
Press the remote trunk closing*
switch2 (
page 112) until the indi-
cator lamp in the switch goes out and
the trunk lid is closed.
To interrupt the closing procedure:
Release remote trunk closing*
switch2.If the trunk lid comes into contact with an
object while closing (e.g. luggage that has
been piled too high), in the sequence, the
upper motion the closing procedure is
stopped and the trunk reopens slightly.iYou can also close the trunk by hand
(page 114).
Warning!
G
Maintain sight of trunk area while operating
the door mounted remote trunk closing*
switch. Monitor the closing procedure care-
fully to ensure that no one is in danger of be-
ing injured.
To interrupt the closing procedure, release
the door mounted remote trunk closing
switch.
Even with the SmartKey or the SmartKey
with KEYLESS-GO* removed from the start-
er 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. Unsuper-
vised use of vehicle equipment may cause
an accident and/or serious personal injury.
Warning!
G
Only drive with the trunk closed as, among
other dangers such as blocked visibility,
exhaust fumes may enter the vehicle
interior.