108 Controls in detailLocking and unlocking
This does not apply if, after starting, the
selector lever is still in positionP and
the SmartKey is then inserted in the
starter switch. The SmartKey will then
have priority over the KEYLESS-GO
function and the vehicle’s electrical
system will operate according to the
position of the SmartKey in the starter
switch, even stopping the engine.
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 while the en-
gine is running (e.g. if passenger exits
the vehicle with the SmartKey with
KEYLESS-GO), the message
Key not
detected!
will appear in the multifunc-
tion display while driving off.Find the SmartKey or change its
present location immediately (e.g.
place it on the front passenger seat or
insert it in shirt pocket).
Remember that the engine can be
started by anyone with a SmartKey
with KEYLESS-GO that is left inside the
vehicle. If you leave the SmartKey with
KEYLESS-GO behind when exiting and
locking the vehicle, the message
Key
recognized in vehicle!
will appear in
the multifunction display.
Factory setting
Global unlocking
Grasp an outside door handle.
All turn signals flash once. The locking
knobs in the doors move up. The
anti-theft alarm system is disarmed.The vehicle will lock again automatically
and reactivate the alarm system within ap-
proximately 40 seconds of unlocking if
neither a door nor the trunk is opened.
Global locking
Press lock button on an outside door
handle (
page 64) or the trunk lid
(
page 110).
With the trunk and all doors closed, all
turn signals flash three times. The lock-
ing knobs in the doors move down.
The anti-theft alarm system is armed.
i
If the vehicle has been parked for more than
72 hours, you must pull an outside door handle
in order to activate the KEYLESS-GO function.
i
The vehicle could inadvertently unlock 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
109 Controls in detail
Locking and unlocking
Selective setting
If you frequently travel alone, you may wish
to reprogram the SmartKey with
KEYLESS-GO so that grasping an outside
door handle only unlocks the driver’s door,
interior lockable storage compartments
and the fuel filler flap.
Press and hold buttons Œ and ‹
simultaneously for about 6 seconds
until battery check lamp5
(page 106) flashes twice.
The SmartKey with KEYLESS-GO will
then function as follows:Unlocking the driver’s door and fuel fill-
er flap
Grasp the driver’s door handle.
All turn signals flash once. The locking
knob in the driver’s door moves up. The
anti-theft alarm system is disarmed.
Global unlocking
Grasp the door handle on the passen-
ger side.
All turn signals flash once. The locking
knobs in the doors move up. The
anti-theft alarm system is disarmed.
Global locking
Press lock button on an outside door
handle or the trunk lid.
With the trunk and all doors closed, all
turn signals flash three times. The lock-
ing knobs in the doors move down.
The anti-theft alarm system is armed.Restoring to factory setting
Press and hold buttons Œ and ‹
simultaneously for about 6 seconds
until battery check lamp5
(page 106) flashes twice.
!
If you can no longer lock or unlock the vehi-
cle with the SmartKey with KEYLESS-GO, then
the batteries in the SmartKey are discharged,
the SmartKey with KEYLESS-GO is malfunction-
ing or the vehicle battery is drained.
Check the batteries in the SmartKey with
KEYLESS-GO (
page 105) and replace
them if necessary (page 395).
Use the mechanical key to unlock the driv-
er’s door (
page 391) and the trunk
(
page 117).
Have the vehicle batteries and their connec-
tions checked (
page 414).
Use the mechanical key to lock or unlock the
doors (
page 393).
If the SmartKey with KEYLESS-GO is malfunc-
tioning, contact an authorized Mercedes-Benz
Center.
110 Controls in detailLocking and unlockingGlobal locking using the lock button on
the trunk lid
1Lock button
Press lock button 1 on the trunk lid.
With the trunk and all doors closed, all
turn signals flash three times. The lock-
ing knobs in the doors move down.
The anti-theft alarm system is armed.
Checking the batteries
Press button ‹or Œ.
Battery check lamp5 (
page 106)
comes on briefly to indicate that the
SmartKey batteries are in order.Loss of SmartKey with KEYLESS-GO
If you lose your SmartKey with
KEYLESS-GO, you should do the following:
Have the SmartKey with KEYLESS-GO
deactivated by an authorized
Mercedes-Benz Center.
Report the loss of the SmartKey with
KEYLESS-GO or the mechanical key to
your car insurance company immedi-
ately.
Have the mechanical lock replaced if
necessary.
Your authorized Mercedes-Benz Center
will be glad to supply you with a replace-
ment.
i
Vehicles with KEYLESS-GO*: To prevent a
possible inadvertent lockout, the trunk lid will
open automatically if a SmartKey with
KEYLESS-GO is recognized inside the trunk.
When the hardtop is retracted, it must be com-
pletely lowered in the trunk before the trunk lid
can be closed (
page 242).
i
You can also lock the vehicle using the lock
button on an outside door handle (
page 64).
i
If battery check lamp5 (
page 106) does
not come on briefly during check, then the
SmartKey batteries are discharged.
Replace the batteries (
page 395).
You can obtain the required batteries at any
authorized Mercedes-Benz Center.
i
If the batteries are checked within signal
range of the vehicle, pressing the‹orŒ
button will lock or unlock the vehicle according-
ly.
111 Controls in detail
Locking and unlocking
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.
1Locking knob
2Inside door handle
Pull on inside door handle2 in direc-
tion of arrow.
If the door was locked, locking knob1
will move up.
Opening the trunk
You can open the trunk if the vehicle is sta-
tionary and the retractable hardtop is fully
opened or closed.
A minimum height clearance of
6.2 ft (1.88 m) is required to open the
trunk lid.
i
If you open a door, the side windows on that
side of the vehicle will lower slightly. The win-
dows close again when you close the door.
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 buttonŒ or‹on the
SmartKey.
Insert the SmartKey in the starter switch.
Vehicles with KEYLESS-GO*:
Grasp 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 40).
The SmartKey with KEYLESS-GO must be in-
side the vehicle.
Warning!
G
Only drive with the trunk closed as, among
other dangers such as blocked visibility, ex-
haust fumes may enter the vehicle interior.i
If the trunk lid does not open, the trunk lid is
still locked separately (
page 117).
i
To facilitate trunk loading and unloading
when the hardtop is retracted, you can raise the
hardtop from its storage position in the trunk us-
ing the load assist feature (
page 241). You
may also unhook the luggage cover.
Remember to re-secure the luggage cover after
loading/unloading the trunk. Otherwise you will
not be able to lower the retractable hardtop.
113 Controls in detail
Locking and unlocking
Vehicles with trunk opening/closing
system*
1Remote trunk opening/closing* switch
2Indicator lamp
Pull and hold switch1 until the trunk
unlocks and begins to open.
Indicator lamp2 comes on and re-
mains lit until the trunk closed.
Release switch1.
To interrupt the opening procedure:
Press or pull switch1.
Closing the trunk Closing trunk from outside manually
1Handle
Lower trunk lid by pulling firmly on
handle1.
Close trunk lid with hands placed flat
on trunk lid.
The power closing assist automatically en-
sures that the lid is pulled closed com-
pletely (
page 118).
!
The trunk lid swings open upwards automat-
ically. Always make sure that there is sufficient
overhead clearance.
Warning!
G
Only drive with the trunk closed as, among
other dangers such as blocked visibility, ex-
haust fumes may enter the vehicle interior.i
When the hardtop is retracted, it must be
completely lowered in the trunk before the trunk
can be closed (
page 199).
i
Do not place the SmartKey in the open
trunk. You may lock yourself out.
i
If the vehicle was previously centrally
locked, the trunk will lock automatically after
closing it. All turn signal lamps flash three times
to confirm locking.
Vehicles with KEYLESS-GO*: To prevent a possi-
ble inadvertent lockout, the trunk will open auto-
matically if a SmartKey with KEYLESS-GO is
recognized inside the vehicle or in the trunk.
The vehicle is only locked when the turn signals
flash three times. If you are carrying a second
SmartKey with KEYLESS-GO with you, you can
still lock the vehicle.
117 Controls in detail
Locking and unlocking
Valet locking
The lock is located next to the handle
above the rear license plate recess.
1Neutral position
2Locked
Close the trunk (
page 113).
Pull the mechanical key out of the
SmartKey (
page 391).
Insert the mechanical key in the trunk
lid lock.
Turn the mechanical key clockwise to
position2 and remove the mechani-
cal key in that position to lock the
trunk.
The trunk remains locked even when the
vehicle is centrally unlocked.
Insert the mechanical key in the trunk
lid lock.
Turn the mechanical key counterclock-
wise to neutral position1 and remove
the mechanical key in that position to
unlock the trunk.
You can now open the trunk
(page 111).
Trunk lid emergency release
With the emergency release button, the
trunk can be opened from inside the trunk.
The emergency release button is located
on the left side of the trunk.
1Emergency release button
Briefly press emergency release
button1.
The trunk opens.
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.
i
You can only cancel the separate trunk lock-
ing mode by means of the mechanical key.
119 Controls in detail
Locking and unlocking
Automatic central locking
The doors and the trunk lid lock automati-
cally when the vehicle is set into motion.
You can open a locked door from the in-
side. Open door only when conditions are
safe to do so.
You can deactivate the automatic locking
using the control system (
page 162).
Locking and unlocking from the inside
You can lock or unlock the vehicle from in-
side using the central locking switches.
This can be useful, for example, if you want
to unlock the passenger door from the in-
side or want to lock the vehicle before
starting to drive.
The central locking switch does not lock or
unlock the fuel filler flap.The switches are located above and be-
tween the center air vents of the air condi-
tioning.
Central locking switches1Locking
2Unlocking
i
The doors unlock automatically after an ac-
cident if the force of the impact exceeds a preset
threshold.
The vehicle locks automatically when the ignition
is switched on and the wheels are turning at ve-
hicle speeds of approximately 9 mph (15 km/h)
or more. You could therefore lock yourself out
when the vehicle
is pushed
is on a test stand
Warning!
G
When leaving the vehicle, always remove the
SmartKey or the SmartKey with
KEYLESS-GO* from the starter switch, take
it with you, and lock the vehicle. Do not
leave children unattended in the vehicle, or
with access to an unlocked vehicle. Unsu-
pervised use of vehicle equipment may
cause an accident and/or serious personal
injury.
Warning!
G
You can open a locked door from inside at
any time. Open door only when conditions
are safe to do so.
121 Controls in detailSeats
Seats
For more information on seat adjustment,
see “Seat adjustment” (
page 43).
Moving the seats forward and
backward
You can move the seats forward and back
to facilitate loading and unloading.The switch is located on the top side of the
seat.
1Seat forward
2Seat backward
Moving the seat forward
Press switch at1 and release.
The seat moves forward automatically.
Moving the seat backward
Press switch at2 and release.
The seat moves backwards to its previ-
ous position automatically.
Lumbar support
You can adjust the contour of the seat’s
lumbar support to help enhance support to
your spine.
1Thumbwheel
Switch on the ignition (
page 39).
Set the lumbar support between 0
and 5.
Warning!
G
When moving the seats, be sure that no one
can be caught by them. Never place hands
under seat or near any moving parts during
a seat adjustment procedure. To stop the
seat from moving when potential danger ex-
ists:
press the switch again
move the seat adjustment switch on the
door (
page 42)
!
When moving the seats, make sure that
there are no items in the footwell or behind the
seats. Otherwise you could damage the seats.