Page 36 of 399

33 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Locking and unlocking with remote control
Unlocking:
Press transmit button Œ. All turn signal lamps blink
once to indicate that the vehicle is unlocked.
The remote control can be programmed for two kinds of
unlocking modes (see below):
Selective unlocking mode –
Press transmit button Œonce to unlock driver’s door
and fuel filler flap.
Press transmit button Œ twice to unlock all doors,
fuel filler flap, and trunk.
Global unlocking mode –
Press transmit button Œonce to unlock all doors,
fuel filler flap, and trunk.
Notes:
The presently active unlocking mode (selective or
global) can only be determined by unlocking the vehicle
with the remote control (see below for changing mode).If within 40 seconds of unlocking with the remote
control, neither door or trunk is opened, the electronic
key is not inserted in the starter switch, or the central
locking switch is not activated, the vehicle will
automatically lock.
Locking:
Press transmit button ‹ once. All turn signal lamps
blink three times to indicate that the vehicle is locked. If
they do not blink three times, a door or trunk is not
properly closed.
Note:
If the vehicle cannot be locked or unlocked by pressing
the transmit button, then it may be necessary to change
the batteries in the electronic key (if ok, battery check
lamp in electronic key will light briefly when pressing
transmit button) or to synchronize the remote control,
see pages 351 and 353.
Choosing global or selective mode on remote control
Press and hold transmit buttons‹ andŒ
simultaneously for five seconds to reprogram the
remote control. Battery check lamp will blink two times
indicating the completed mode change.
Page 37 of 399

34 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Opening and closing windows and
panorama sliding / pop-up roof from outside
(summer opening / convenience feature)
Aim transmitter eye of remote control at the door
receiver.
Summer opening:
The panorama sliding / pop-up roof and all side windows
can be opened automatically.
Continue to press transmit button Œ after unlocking
the vehicle.
The windows and panorama sliding / pop-up roof begin
to open after a short time.
To interrupt opening procedure, release transmit
button.
Convenience feature:
The panorama sliding / pop-up roof and the side
windows can be closed.
Continue to press transmit button ‹ after locking
the vehicle.
The windows and panorama sliding / pop-up roof begin
to close after approximately 1 second.To interrupt closing procedure, release transmit button.
Ensure that all side windows and the panorama
sliding / pop-up roof are properly closed before leaving
the vehicle.
Note:
If the windows and panorama sliding / pop-up roof
cannot be operated automatically by pressing the
transmit button of the remote control then it may be
necessary to change the batteries in the electronic key
(if ok, battery check lamp in electronic key will light
briefly when transmitting), or to synchronize the
remote control, see page 351 and 353.
Wa r n i n g !
Never operate the windows or panorama sliding /
pop-up roof if there is the possibility of anyone
being harmed by the opening or closing procedure.In case the procedure causes potential danger, the
procedure can be immediately halted by releasing
the remote control button. To reverse direction of
movement press Œ for opening or ‹ for
closing.
Page 43 of 399

40 Central locking system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Automatic central locking
With the automatic central locking system activated, the
doors and trunk are locked at vehicle speeds of
approximately 9 mph (15 km / h) or more. The fuel filler
flap remains unlocked.
The automatic central locking function can be switched
on or off in the individual setting menu “VEHICLE” –
“AUTOMATIC DOOR LOCK”, see page 121.
Notes:
If doors are unlocked with the central locking switch
after activating the automatic central locking, and
neither door is opened, then the doors remain unlocked
even at vehicle speeds of approximately 9 mph
(15 km / h) or more.
If a door is opened from the inside at speeds of
approximately 9 mph (15 km / h) or less with the
automatic central locking activated, the door will again
be automatically locked at speeds of approximately
9 mph (15 km / h) or more.If a door is opened from the inside, the complete vehicle
is unlocked, if the vehicle was previously centrally
unlocked using the remote control.
Important!
When towing the vehicle, or with the vehicle on a
dynamometer test stand, please, note the following:
With the automatic central locking activated and the
electronic key in starter switch position 2, the vehicle
doors will lock if the left front wheel as well as the right
rear wheel spin at vehicle speeds of approximately
9 mph (15 km / h) or more.
Emergency unlocking in case of accident
The doors unlock automatically a short time after an
accident in which an airbag or emergency tensioning
retractor deploys (this is intended to aid rescue and
exit).
Page 47 of 399
44 Antitheft alarm system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Antitheft alarm system (optional for Canada )
1Indicator lamp in switch located in center consoleThe antitheft alarm is automatically armed or disarmed
with the remote control by locking or unlocking the
vehicle.
The antitheft alarm is armed within approximately
10 seconds after locking the vehicle.
A blinking lamp (1) indicates that the alarm is armed.
P54.25-2500-26
Page 48 of 399
45 Antitheft alarm system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Operation:
Once the alarm system has been armed, the exterior
vehicle lamps will flash and an alarm will sound when
someone:
•opens a door,
•opens the trunk,
•opens the hood,
•attempts to raise the vehicle.
The alarm will last approximately 3 minutes in form of
flashing exterior lamps. At the same time an alarm will
sound for 30 seconds. The alarm will stay on even if the
activating element (a door, for example) is immediately
closed. If the alarm stays on for more than 20 seconds,
an emergency call is initiated automatically. See Tele
Aid on page 228.Notes:
When you unlock the driver’s door with the mechanical
key, the exterior lamps will flash and the alarm will
sound.
To cancel the alarm, insert the electronic key in the
starter switch or press buttonŒ or‹ on the
electronic key.
Page 49 of 399

46 Tow-away alarm
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Tow-away alarm (optional for Canada)
The switch is located in the center console.
1Press to switch off tow-away alarm
2Indicator lamp
Once the alarm system has been armed, the exterior
vehicle lamps will flash and an alarm will sound when
someone attempts to raise the vehicle.The alarm will last approximately 3 minutes in form of
flashing exterior lamps. At the same time an alarm will
sound for 30 seconds. The alarm will stay on even if the
vehicle is immediately lowered. To cancel the alarm,
insert the electronic key in the starter switch or press
buttonŒ or‹ on the electronic key.
If the alarm stays on for more than 20 seconds, an
emergency call is initiated automatically. See Tele Aid
on page 228.
To pr even t tr igger in g t he tow-away alarm feature, switch
off the tow-away alarm before towing the vehicle, or
when parking on a surface subject to movement, such
as a ferry or auto train.
To do so, turn electronic key in starter switch to
position 0 or 1, or remove electronic key from starter
switch. Press tow-away alarm switch (1). The indicator
lamp (2) illuminates briefly.
Exit vehicle, and lock vehicle with the electronic key.
The tow-away alarm remains switched off until the
vehicle is locked again with the electronic key, at which
time it is automatically reactivated.
Page 52 of 399

49 Seats
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Power seat (optional)
The switches are located in each door.
We recommend to adjust the power seat in the following
order:
1Seat, up / down
Press the switch (up / down direction) until
comfortable seating position with still sufficient
headroom is reached.2Seat adjustment, fore / aft
Press the switch (fore / aft direction) until a
comfortable seating position is reached that still
allows you to reach the accelerator / brake pedal
safely. The position should be as far rearward as
possible, consistent with ability to properly operate
controls.
3Seat cushion tilt
Press the switch in the direction of the arrow until
your legs are lightly supported.
4Backrest tilt
Press the switch in the direction of the arrow until
your arms are slightly angled when holding the
steering wheel.
5Head restraint
The height of the head restraint is adjusted
automatically with the seat so that the back of the
head is supported approximately at ear level. Adjust
the head restraint using the switch to support the
back of your head approximately at ear level.
For exterior rear view mirrors, see page 90;
inside rear view mirror, see page 89;
steering wheel adjustment, see page 88.
Page 59 of 399
56 Seats
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Front seat backrest - locking and unlocking
1Release lever
Folding forward:
Lift release lever (1) and fold backrest forward, when
necessary, lower head restraint by pushing it.
Note:
Vehicles with power seat:
The seat will automatically slide forward and the head
restraints will move down.Folding back:
Fold backrest back until it locks securely in place.
Adjust head restraint to support the back of the head
approximately at ear level, see page 52.
Note:
Vehicles with power seat:
The seat and head restraint return to their previous
positions.