
Interior motion sensor
Function When the interior motion sensor is switched on,
a visual and audible alarm is triggered if move-
ment is detected in the vehicle interior. This can occur if someone reaches into the vehicle inte-
rior, for example.
Switching on/off The interior motion sensor is automatically
switched on and off with the ATA (Anti-Theft
Alarm system) when:
R the doors are closed
R the tailgate is closed
The interior motion sensor is active around ten
seconds after the ATA has been switched on
(Y page 79).
You can prevent false alarms by doing the fol-
lowing before switching on the ATA:
R close the side windows
R close the sliding sunroof
R make sure that no objects, such as mascots,
are attached to the rear-view mirror or the
grab handles on the roof trim
Deactivating If you want to lock your vehicle and people or
animals are inside it, you can deactivate the
interior motion sensor.
The interior motion sensor remains deactivated until you switch the ATA on again after opening
a door.
You can deactivate the interior motion sensor
via the multimedia system (see Digital Owner's
Manual). Protection against theft
81Safety Z

Key
Important safety notes
United Kingdom only: G
WARNING
When the double locks are activated, the
doors can no longer be opened from the
inside. People in the vehicle can no longer get out, e.g. in hazardous situations. There is a
risk of injury.
Therefore, do not leave any people unsuper-
vised in the vehicle, particularly children, eld-
erly people or people in need of special assis-
tance. Do not activate the double lock when
people are in the vehicle.
If the vehicle has been locked from the outside, the double lock function is activated as stand-
ard. It is then not possible to open the doors
from inside the vehicle. You can deactivate the
double lock function by deactivating the interior
motion sensor (see Digital Owner's Manual).
The doors can then be opened from the inside
after the vehicle has been locked from the out-
side. The anti-theft alarm system is triggered if
the door is opened from the inside. Switch off
the alarm (Y page 79).
All countries: G
WARNING
If children are left unsupervised in the vehicle, they can:
R open doors and endanger other persons or
road users
R climb out and be injured by the traffic
R operate vehicle equipment and, for exam-
ple, trap themselves.
Children could also set the vehicle in motion, for example by:
R releasing the parking brake
R shifting the automatic transmission out of
park position P
R starting the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the key
with you and lock the vehicle. Never leave children unattended in the vehicle. Always
keep the key out of reach of children. G
WARNING
If you attach heavy or large objects to the key, the key could be unintentionally turned in the
ignition lock. This could cause the engine to
be switched off. There is a risk of an accident.
Do not attach any heavy or large objects to the
key. Remove any bulky keyrings before insert-
ing the key into the ignition lock.
! Keep the key away from strong magnetic
fields. Otherwise, the remote control function could be affected.
Strong magnetic fields can occur in the vicin-
ity of powerful electrical installations.
Do not keep the key: R with electronic devices, e.g. a mobile phone
or another key
R with metallic objects, e.g. coins or metal foil
R inside metallic objects, e.g. a metal case
This can impair the key's function.
Vehicles with KEYLESS-GO start function: do
not keep the key in the luggage compartment.
Otherwise, the key may not be detected, e.g.
when starting the engine using the Start/Stop
button.
A check that periodically establishes a radio
connection between the vehicle and the key
determines whether a valid key is in or in the
direct vicinity of the vehicle. This occurs, for
example:
R during engine start
R during driving
R when using HANDS-FREE ACCESS
R when the external door handles are touched
R during convenience closing 82
KeyOpening and closing

X
To unlock the vehicle: touch the inner sur-
face of the door handle.
X To lock the vehicle: touch sensor surface :
or ;.
Make sure that you do not touch the inner
surface of the door handle.
X Convenience closing feature: touch
recessed sensor surface ;for an extended
period.
Further information on the convenience clos-
ing feature (Y page 97).
X To unlock the tailgate: push the top of the
star on the tailgate inwards.
Deactivating and activating If you do not intend to use a key for an extended
period of time, you can deactivate the KEYLESS-
GO function of the key. The key will then use very
little power, thereby conserving battery power.
For the purposes of activation or deactivation,
the vehicle does not have to be nearby.
X To deactivate: press the&button on the
key twice in rapid succession.
The battery indicator lamp (Y page 85) of
the key flashes twice briefly and lights up
once, then KEYLESS-GO is deactivated.
X To activate: press any button on the key.
or X Insert the key into the ignition lock.
KEYLESS-GO and all its associated features
are available again. KEYLESS-GO start function
General notes Bear in mind that the engine can be started by
any of the vehicle occupants if there is a key in
the vehicle (Y page 146). Changing the settings of the locking
system
You can change the settings of the locking sys-
tem. This means that only the driver's door and
the fuel filler flap are unlocked when the vehicle is unlocked. This is useful if you frequently travel
alone. X
To change the setting: simultaneously press
the % and& buttons for approximately
six seconds until the battery check lamp
(Y page 85) flashes twice.
If the setting of the locking system is changed
within the signal range of the vehicle, pressing
the & or% button:
R locks or
R unlocks the vehicle
The key now functions as follows:
X To unlock: press the%button once.
X To unlock centrally: press the%button
twice.
X To lock: press the &button.
The KEYLESS-GO functions can be changed as
follows: X To unlock the driver's door: touch the inner
surface of the door handle on the driver's
door.
X To unlock centrally: touch the inner surface
of the door handle on the front-passenger
door or the rear door.
X To lock centrally: touch the outer sensor
surface on one of the door handles.
X To restore the factory settings: press and
hold the %and& buttons simultane-
ously for approximately six seconds until the
battery check lamp (Y page 85) flashes
twice. Emergency key element
General notes If the vehicle can no longer be unlocked with the
key or KEYLESS-GO, use the emergency key ele-
ment.
If you use the emergency key element to unlock
and open the driver's door, the anti-theft alarm
system will be triggered. Switch off the alarm
(Y page 79).
If you unlock the vehicle using the emergency
key element, the fuel filler flap will not be
unlocked automatically.
X To unlock the fuel filler flap: insert the key
into the ignition lock. 84
KeyOpening and closing

Problem
Possible causes/consequences and
M
MSolutions You have lost a key. X
Have the key deactivated at a qualified specialist workshop.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. You have lost the emer-
gency key element. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the locks changed as well. Doors
Important safety notes
United Kingdom only: G
WARNING
When the double locks are activated, the
doors can no longer be opened from the
inside. People in the vehicle can no longer get out, e.g. in hazardous situations. There is a
risk of injury.
Therefore, do not leave any people unsuper-
vised in the vehicle, particularly children, eld-
erly people or people in need of special assis-
tance. Do not activate the double lock when
people are in the vehicle.
If the vehicle has been locked from the outside, the double lock function is activated as stand-
ard. It is then not possible to open the doors
from inside the vehicle. You can deactivate the
double lock function by deactivating the interior
motion sensor (see Digital Owner's Manual).
The doors can then be opened from the inside
after the vehicle has been locked from the out-
side. The anti-theft alarm system is triggered if
the door is opened from the inside. Switch off
the alarm (Y page 79).
All countries: G
WARNING
If children are left unsupervised in the vehicle, they can:
R open doors and endanger other persons or
road users
R climb out and be injured by the traffic
R operate vehicle equipment and, for exam-
ple, trap themselves. Children could also set the vehicle in motion,
for example by:
R releasing the parking brake
R shifting the automatic transmission out of
park position P
R starting the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the key with you and lock the vehicle. Never leave
children unattended in the vehicle. Always
keep the key out of reach of children. Unlocking and opening the doors
from the inside
United Kingdom only: if the vehicle has been
locked with the key or with KEYLESS-GO, the
double lock function is activated as standard. It is then not possible to open the doors from
inside the vehicle. You can deactivate the dou-
ble lock function by deactivating the interior
motion sensor (see Digital Owner's Manual).
The doors can then be opened from the inside
after the vehicle has been locked from the out-
side. You can open the rear doors from inside
the vehicle only if they are not secured by the
child-proof locks (Y page 67). The anti-theft
alarm system is triggered if the door is opened
from the inside. Switch off the alarm
(Y page 79).
For all countries except the United Kingdom:
You can open a door from inside the vehicle
even if it has been locked. You can open the rear
doors from inside the vehicle only if they are not
secured by the child-proof locks (Y page 67). If
the vehicle has previously been locked with the
key or with KEYLESS-GO, opening a door from
the inside will trigger the anti-theft alarm sys-
tem. Switch off the alarm (Y page 79).88
DoorsOpening and closing

X
Pull door handle ;.
If the door is locked, locking knob :pops up.
The door is unlocked and opens. Centrally locking and unlocking the
vehicle from the inside
You can centrally lock and unlock the vehicle
from the inside. The switches are on the driver's door. X
To unlock: press button :.
X To lock: press button ;.
When the front-passenger door is closed, the
vehicle is locked.
This does not lock or unlock the fuel filler flap.
You cannot unlock the vehicle centrally from the
inside if the vehicle has been locked with the key or KEYLESS-GO.
For all countries except the United Kingdom:
If the vehicle has previously been locked with
the key or with KEYLESS-GO, opening a door
from the inside will trigger the anti-theft alarm
system. Switch off the alarm (Y page 79).
United Kingdom only: if the vehicle has been
locked with the key or with KEYLESS-GO, the
double lock function is activated as standard. It is then not possible to open the doors from inside the vehicle. You can deactivate the dou-
ble lock function by deactivating the interior
motion sensor (see Digital Owner's Manual).
Opening/closing doors is then possible as fol-
lows: the doors can be opened from inside. You
can open the rear doors from inside the vehicle
only if they are not secured by the child-proof
locks (Y page 67).
When a locked door is opened from inside the
vehicle, the previous unlocking process will be
observed if the vehicle has been:
R locked with the locking button for the central
locking or
R locked automatically
The vehicle will be fully unlocked if it had previ-
ously been fully unlocked. Only the door that has
been opened from the inside is unlocked if only the driver's door had previously been unlocked. Automatic locking feature
X
To deactivate: press and hold button :for
approximately five seconds until a tone
sounds.
X To activate: press and hold button ;for
approximately five seconds until a tone
sounds.
If you press one of the two buttons and do not
hear a tone, the relevant setting has already
been selected.
The vehicle is locked automatically when the
ignition is switched on and the wheels are turn-
ing.
Therefore, you could be locked out if:
R the vehicle is being pushed
R the vehicle is being towed
R the vehicle is being tested on a dynamometer Doors
89Opening and closing Z

Opening automatically
You can open the tailgate automatically using
the key or by pressing the top of the Mercedes
star
:on the tailgate.
X Press and hold the Fbutton on the key
until the tailgate opens.
or X With the tailgate unlocked, press the top of
the Mercedes star :.
or X With the tailgate stopped in an intermediate
position, pull the tailgate upwards.
You can release the tailgate as soon as the
tailgate starts to open.
X When the reversing camera is activated:
pull on the folded-out Mercedes star
:.
The tailgate opens.
Closing automatically :
Closing button
; Locking button
X Press closing button :on the tailgate.
or
X Pull the tailgate downwards slightly.
You can release the tailgate as soon as the
tailgate starts to close. When the driver's door is closed, you can simul-
taneously close the tailgate and lock the vehicle.
To do this, the key must be in the KEYLESS-GO
detection range to the rear of the vehicle.
X Press locking button ;on the tailgate.
If KEYLESS-GO detects a key outside the vehi- cle, the tailgate closes. The vehicle is locked.
or
Vehicles with EASY-PACK tailgate and with
KEYLESS-GO or KEYLESS-GO start-function:
X If the key is located in the immediate vicinity
of the vehicle: press the Fbutton on the
key.
You can release the button as soon as the
tailgate starts to close.
If KEYLESS-GO detects a key only in the luggage
compartment after it is closed, the tailgate is
unlocked again.
If a second key is detected outside the vehicle,
the tailgate remains locked.
If KEYLESS-GO detects a key only in the luggage compartment before the closing process starts,
the tailgate remains open. HANDS-FREE ACCESS
Important safety notes G
WARNING
The vehicle exhaust system can become very
hot. If you use HANDS-FREE ACCESS, you
could burn yourself by touching the exhaust
system. There is a risk of injury. Always
ensure that you only make a leg movement
within the detection range of sensors.
! If the key is within the rear detection range
of KEYLESS-GO, the following situations, for
example, could lead to the unintentional
opening of the tailgate:
R using a car wash
R using a high-pressure cleaner
Make sure that the key is at least 3 m away
from the vehicle.
General notes With KEYLESS-GO and HANDS-FREE ACCESS,
you can open or close the tailgate or stop the
process without using your hands. This is useful92
Luggage compartmentOpening and closing

if you have your hands full. To do this, make a
kicking movement under the bumper with your
foot.
Observe the following points:
R Carry your KEYLESS-GO key with you. The key
must be in the KEYLESS-GO detection range
to the rear of the vehicle.
R When making the kicking movement, make
sure that you are standing firmly on the
ground and that there is sufficient clearance
to the rear of the vehicle. You could otherwise lose your balance, e.g. on ice. R
Always ensure that you only make a kicking
movement within the detection range of sen- sors :.
R Stand at least 30 cm away from the rear area
while doing so.
R Do not come into contact with the bumper
while making the kicking movement. Other-
wise, the sensors may not function correctly.
R HANDS-FREE ACCESS does not function dur-
ing engine start.
R Dirt caused by road salt around sensors :
may restrict functionality.
Using HANDS-FREE ACCESS with a pros-
thetic leg may restrict functionality.
R If a KEYLESS-GO key is in the KEYLESS-GO
detection range to the rear of the vehicle,
HANDS-FREE ACCESS could be triggered. The tailgate could thus be opened or closed
unintentionally, for example, if you:
- fold the ball coupling in or out
- couple or uncouple a trailer
- fit or remove a rear-mounted bicycle rack
- load/unload bicycles on/from a rear-
mounted bicycle rack
- sit on the edge of the luggage compartment
- set down or lift up an object behind the
vehicle
- polish the rear of the vehicle
Do not carry the KEYLESS-GO key with you in such situations. This will prevent uninten-
tional opening or closing of the tailgate.
Operation X
To open or close: kick into sensor detection
range :under the bumper with your foot.
Two warning tones sound while the tailgate is opening or closing.
X If the tailgate does not open or close after
several attempts: wait at least ten seconds
then kick under the bumper once again.
If you hold your foot under the bumper for too
long, the tailgate does not open or close. Repeat
the kicking movement more quickly if this
occurs.
To stop the opening or closing process, you have the following options:
R Kick with your foot into sensor detection
range :under the bumper.
R Press the top of the star on the tailgate.
R Press the closing button on the tailgate.
R Press the Fbutton on the key.
If the tailgate closing process has been stopped:
R Kick your foot under the bumper again and
the tailgate will open. Luggage compartment
93Opening and closing Z

Convenience opening feature
X
Press and hold the %button on the key
until the sliding sunroof is in the desired posi- tion.
X To interrupt convenience opening: release
the % button. Convenience closing feature
Important safety notes G
WARNING
When the convenience closing feature is oper- ating, parts of the body could become trapped
in the closing area of the side window and the
sliding sunroof. There is a risk of injury.
Observe the complete closing procedure
when the convenience closing feature is oper-
ating. When closing make sure that no parts of the body are in the closing area.
Vehicles with KEYLESS-GO or KEYLESS-GO
start function: if the key is in the immediate
vicinity of the vehicle, the "convenience closing" feature is available.
When you lock the vehicle, you can simultane-
ously:
R close the side windows
R close the sliding sunroof
Notes on the automatic reversing function for:
R the side windows (Y page 95)
R the sliding sunroof (Y page 99)
Using the key X
Press and hold the &button until the side
windows and the sliding sunroof are fully
closed.
X Make sure that all the side windows and the
sliding sunroof are closed.
X To interrupt convenience closing: release
the & button.
Using KEYLESS-GO The driver's door and the door at which the han-
dle is used must both be closed. The key must be outside the vehicle. The distance between the
key and the corresponding door handle must not
be greater than 1 m. X
Touch recessed sensor surface :on the
door handle until the side windows and the
sliding sunroof are fully closed.
Make sure you touch only recessed sensor
surface :.
X Make sure that all the side windows and the
sliding sunroof are closed.
X To interrupt convenience closing: release
recessed sensor surface :on the door han-
dle. Resetting the side windows
If a side window can no longer be closed fully,
you must reset it.
X Close all doors.
X Turn the key to position 1or 2in the ignition
lock.
X Pull the corresponding switch on the door
control panel until the side window is com-
pletely closed (Y page 96).
X Hold the switch for an additional second.
If the side window opens again slightly: X Immediately pull the corresponding switch on
the door control panel until the side window is completely closed (Y page 96).
X Hold the switch for an additional second.
X If the corresponding side window remains
closed after the button has been released, the
side window has been reset correctly. If this is
not the case, repeat the steps above again. Side windows
97Opening and closing Z