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Keys, doors and windows23Unlocking
Press the button on the respective
exterior door handle and pull the
handle.
Unlocking mode can be set in the
vehicle personalisation menu in the
Info Display. Two settings are
selectable:
● All doors, load compartment and fuel filler flap will be unlocked by
pressing the button on any
exterior handle once.
● Only the driver's door and fuel filler flap will be unlocked by
pressing the button on the
driver's door exterior handle
once. To unlock all doors and
load compartment, press button
twice.
The setting can be changed in the
menu Settings in the Info Display.
Vehicle personalisation 3 124.
Locking
Press the button on any exterior door
handle.
All doors, load compartment and fuel
filler flap will be locked.
The system locks if any of the
following occurs:
● It has been more than five seconds since unlocking.
● The button on an exterior handle has been pressed twice within
five seconds to unlock the
vehicle.
● Any door has been opened and all doors are now closed.
If the driver's door is not closed
properly, the electronic key remains in the vehicle or the ignition is not off,
locking will not be permitted.
If there have been two or more
electronic keys in the vehicle and the
ignition was on once, the doors will be
locked even if just one electronic key
is taken out of the vehicle.
Unlocking the tailgate
The tailgate can be unlocked by
pushing the touchpad switch under
the brand emblem when the
electronic key is in range. The doors
remain locked. Load compartment
3 29.
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24Keys, doors and windowsUnlocking and opening the power
tailgate
The power tailgate can be unlocked and opened handsfree by moving the foot below the rear bumper.
Alternatively, press the touchpad switch under the brand emblem. Theelectronic key has to be in range. The
doors remain locked. Load
compartment 3 29.
Operation with buttons on the
electronic key
The central locking system can also
be operated with the buttons on the
electronic key.
Unlocking
Press c.
Unlocking mode can be set in the
vehicle personalisation menu in the
Info Display. Two settings are
selectable:
● All doors, load compartment and fuel filler flap will be unlocked by
pressing c once.
● Only the driver's door and fuel filler flap will be unlocked by
pressing c once. To unlock all
doors and load compartment,
press c twice.
Select the relevant setting in Settings,
I Vehicle in the Info Display.
Info-Display 3 118.
Vehicle personalisation 3 124.
The setting can be saved for the key
being used. Memorised settings
3 25.Locking
Close doors, load compartment and
fuel filler flap.
Press e.If the driver's door is not closed
properly, the central locking system will not work.
Passive locking
Automatic locking 3 27.
Confirmation
Operation of central locking system is
confirmed by the hazard warning
flashers. A precondition is that the
setting is activated in the vehicle
personalisation 3 124.
Fault
If the central locking cannot be
operated or the engine cannot be
started, the cause may be one of the
following:
● Fault in electronic key.
● Electronic key is out of reception range.
● The battery voltage is too low.
Page 27 of 345

Keys, doors and windows25● Overload of the central lockingsystem by operating at frequent
intervals, the power supply is
interrupted for a short time.
● Interference from higher-power radio waves from other sources.
To rectify the cause of the fault,
change the position of the electronic
key.
Manual unlocking 3 25.
Memorised settings
Whenever the ignition is switched off, some functions of the following
settings may be automatically
memorised by the remote control unit
or the electronic key:
● automatic climate control
● lighting
● Infotainment system
● central locking system
● Sport mode settings
● comfort settingsThe saved settings are automatically
used the next time the ignition is
switched on with the memorised
electronic key 3 22.
A precondition is that Personalisation
by Driver is activated in the personal
settings of the Info-Display. This must
be set for each electronic key which is
used. The status change is available
only after locking and unlocking the
vehicle.
The assigned memory position of the power seat is automatically recalled
when switching on ignition and Auto
Memory Recall is activated in the
Info-Display for the memorised
electronic key.
Power seat 3 50.
Vehicle personalisation 3 124.
Central locking system Unlocks and locks doors, load
compartment and fuel filler flap.
A pull on an interior door handle
unlocks the respective door. Pulling
the handle once more opens the door.Note
In the event of an accident in which
airbags or belt pretensioners are
deployed, the vehicle is
automatically unlocked.
Note
A short time after unlocking with the
electronic key, the doors are being
locked automatically if no door has
been opened. A precondition is that
the setting is activated in the vehicle
personalisation 3 124.
Central locking buttons
Locks or unlocks all doors, the load
compartment and fuel filler flap from
the passenger compartment via a
switch in the driver's door panel.
Page 28 of 345
26Keys, doors and windows
Press e to lock.
Press c to unlock.
Operation with the key in case of
a central locking system fault
In case of a fault, e.g. vehicle battery
or electronic key battery is
discharged, the driver's door can be
locked or unlocked with the key blade.Push the button on the electronic key
and pull out the key blade.
The lock cylinder in the driver's door is covered by a cap.
Insert the key blade into the recess at the bottom of the cap and swivel the
key upward.
Manual unlocking
Manually unlock the driver's door by
inserting and turning the key blade in
the lock cylinder.
The other doors can be opened by
pulling the interior handle twice or by
pressing c in the driver's door panel.
The load compartment and fuel filler
flap will possibly not be unlocked.
By switching on the ignition, the anti-
theft locking system is deactivated.
Page 29 of 345

Keys, doors and windows27Manual locking
Push inside locking knob of all doors
except driver's door or press e in the
driver's door panel. Then close the driver's door and lock it from the
outside by turning the key in the lock
cylinder. The fuel filler flap and
tailgate are possibly not locked.
After locking, cover the lock cylinder
with the cap: insert the cap with the
lower side in the recesses, swivel and
push the cap until it engages at the
upper side.
Automatic lockingAutomatic locking after driving off
This security feature can be
configured to automatically lock all
doors, load compartment and fuel
filler flap after driving off and
exceeding a certain speed.
When at a standstill after driving, the
vehicle will be unlocked automatically
as soon as the ignition is switched off.
Activation or deactivation of
automatic locking can be set in the
menu Settings , I Vehicle in the Info-
Display.
Info-Display 3 118.
Vehicle personalisation 3 124.
The setting can be saved for each
electronic key being used 3 25.
Automatic relock after unlocking This feature can be configured to
automatically lock all doors, load
compartment and fuel filler flap a
short time after unlocking with the
electronic key, provided no door has
been opened.
Activation or deactivation of
automatic relock can be set in the
menu Settings , I Vehicle in the Info-
Display.
Info-Display 3 118.
Vehicle personalisation 3 124.
The setting can be saved for each
electronic key being used 3 25.
Page 30 of 345

28Keys, doors and windowsPassive lockingThis feature locks the vehicle
automatically after several seconds if
an electronic key has been
recognised previously inside the
vehicle, all doors have then been
closed and the electronic key does
not remain within the vehicle.
If the electronic key remains in the
vehicle or the ignition is not off,
passive locking will not be permitted.
If there have been two or more
electronic keys in the vehicle and the
ignition was on once, the feature
locks the vehicle if just one electronic key is taken out of the vehicle.
To prevent passive locking of the
vehicle e.g. when refuelling or if
passengers remain in the vehicle, the
system must be disabled.
To disable the system, press the
central locking button c for a few
seconds while one door is open. An
acoustic signal sounds three times to
confirm deactivation. The function
remains disabled until the central
locking button e is pressed or the
ignition is switched on.Activation or deactivation of passive
locking can be set in the menu
Settings , I Vehicle in the Info-Display.
Info-Display 3 118.
Vehicle personalisation 3 124.
The setting can be saved for each
electronic key being used 3 25.
Child locks9 Warning
Use the child locks whenever
children are occupying the rear
seats.
Move the pin in the rear door to the front position. The door cannot be
opened from the inside.
To deactivate, move the pin to the
rear position.
Page 31 of 345
Keys, doors and windows29Doors
Load compartment Tailgate
OpeningGrand Sport
After unlocking, push the brand
emblem and open the tailgate.
Sports Tourer, Country Tourer
After unlocking, push the touchpad
switch under the tailgate moulding
and open the tailgate.
Central locking system 3 25.
Closing
Use the interior handle.
Central locking system 3 25.
Power tailgate
9 Warning
Take care when operating the
power tailgate. Risk of injury,
particularly to children.
Keep a close watch on the
movable tailgate when operating.
Ensure that nothing becomes
Page 32 of 345

30Keys, doors and windowstrapped during operating and no
one is standing within the moving
area.
The power tailgate can be operated
by:
● The electronic key.
● Handsfree operation with motion sensor below the rear bumper.
● The touchpad switch under the exterior tailgate moulding andC in the open tailgate.
● The switch C on the inside of
the driver's door.
On vehicles with automatic
transmission, the tailgate can only be operated when the vehicle is
stationary and with selector lever in P.
The turn signal lights flash and a
chime sounds when the power
tailgate is operating.
Note
Operating the power tailgate does
not operate the central locking
system. To open the tailgate with the
button on the electronic key, or with
the touchpad switch under the
tailgate moulding or via handsfree
operation, it is not necessary to
unlock the vehicle. A precondition is
that the electronic key is outside the
vehicle, within a range of approx.
one metre of the tailgate.
Do not leave the electronic key in the load compartment.
Lock the vehicle after closing if it was
unlocked previously.
Central locking system 3 25.
Operation with the electronic keyPress X twice to open or close the
tailgate. To prevent unintended
opening of the tailgate, X must be
pressed longer than during locking or unlocking.
Handsfree operation with motion
sensor below the rear bumper
To open or close the tailgate, move
the foot in the center area below the
rear bumper back and forth quickly.
Do not hold the foot under the
bumper. Depending on light
conditions, the area is indicated by a
symbol projected on the ground. The
electronic key must be outside the