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24Keys, doors and windowsReplacing battery in electronic
key
Replace the battery as soon as the
system no longer operates properly
or the range is reduced. The need for battery replacement is indicated by a
message in the Driver Information
Centre 3 103.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
1. Remove the cover.
2. Extract the flat battery from its location.
3. Replace battery with a battery of the same type. Pay attention to
the installation position.
4. Clip the cover in place.
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.
● Overload of the central locking system 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 24.
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.
Notice
In the event of an accident in which
airbags or belt pretensioners are
deployed, the vehicle is
automatically unlocked.
Notice
A short time after unlocking with the
remote control the doors are locked
automatically if no door has been
Page 27 of 263

Keys, doors and windows25opened. A precondition is that the
setting is activated in the vehicle
personalisation 3 104.
Remote control operation
Unlocking
Press O.
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 O once.
● Only the driver's door, load compartment and fuel filler flap
will be unlocked by pressing O
once. To unlock all doors, press O twice.
Select the relevant setting in the Vehicle personalisation.
Vehicle personalisation 3 104.
Unlocking the tailgate
Press P longer to unlock the
tailgate only.
Unlocking and opening the tailgate
3 30.
Locking
Close doors, load compartment and
fuel filler flap.
Press N.
If the driver's door is not closed
properly, the central locking system
will not work.
Confirmation
Operation of the central locking
system is confirmed by the hazard
warning flashers. A precondition is
that the setting is activated in the
vehicle personalisation 3 104.
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26Keys, doors and windowsElectronic key system operation
The electronic key must be outside
the vehicle, within a range of approx. one metre of the relevant door side.
Unlocking
Pass your hand behind the door
handle of one of the front doors to
unlock the vehicle or press the
tailgate opening control.
Keep the hand behind the door
handle or keep the tailgate opening control pressed to open the windows.
Unlocking mode can be set in the
vehicle personalisation menu in the
Info-Display. Two settings are
selectable:
● Only the driver's door will be unlocked by passing your hand
behind the driver's door handle.
● All doors, load compartment and fuel filler flap will be unlocked by
passing your hand behind the
passenger's door handle or by
pressing the tailgate opening
control.
● Only the tailgate will be unlocked
by pressing the tailgate
touchpad.
Vehicle personalisation 3 104
Locking
Press with a finger or thumb on one
of the door handles (at the markings)
or press the tailgate touchpad.
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Keys, doors and windows27All doors, load compartment and fuel
filler flap will be locked.
The system locks if 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 and a
warning chime sounds.
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 and opening the tailgate The tailgate can be unlocked and
opened handsfree by pushing the touchpad switch under the tailgate
moulding when the electronic key is in
range. The doors remain locked.
Load compartment 3 30.Operation with buttons on the
electronic key
The central locking system can also
be operated with the buttons on the
electronic key.
Press O to unlock.
Press N to lock.
Press P longer to unlock and open
only the power tailgate.
Remote control operation 3 24.
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 3 104.
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.
Press Q to lock. The LED in the button
illuminates.
Press Q again to unlock. The LED in
the button extinguishes.
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28Keys, doors and windowsOperation with the key in case of
a central locking system fault
In case of a fault, e.g. vehicle battery
or remote control/electronic key
battery is discharged, the driver's
door can be locked or unlocked with
the mechanical key.
Manual unlocking
Electronic key: press and hold the
latch to extract the integral key.
Manually unlock the driver's door by
inserting and turning the key in the
lock cylinder.
The other doors can be opened by
pulling the interior handle. The load
compartment and fuel filler flap will
possibly not be unlocked.
By switching on the ignition, the anti- theft locking system is deactivated.
Manual locking
Manually lock the driver's door by
inserting and turning the key in the lock cylinder.
To lock the other doors, remove the
black cover by using a key.
Insert key carefully and move to the
inner side of the door without turning
the key.
Remove key and attach black cover.
The fuel filler flap and tailgate are
possibly not locked.
Automatic locking Automatic locking after driving off This system allows automatic
simultaneous locking of the doors and
boot as soon as the speed of the
vehicle exceeds 10 km/h.
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Keys, doors and windows29If one of the doors or the load
compartment is open, the automatic
central locking does not take place.
This is signalled by the sound of the
locks rebounding, accompanied by
illumination of h in the instrument
panel, an audible signal and the display of an alert message.
You can activate or deactivate this
function permanently. With the
ignition on, press Q until an audible
signal starts and a corresponding message is displayed.
The state of the system stays in
memory when switching off the
ignition.
Automatic relock after unlocking
This feature automatically locks all
doors, load compartment and fuel
filler flap a short time after unlocking
with the remote control or electronic
key, provided no door has been
opened.
Child locks9 Warning
Use the child locks whenever
children are occupying the rear
seats.
Child locks, mechanical
Turn the red child lock in the rear door to the horizontal position by using a
key. The door cannot be opened from
the inside.
To deactivate, turn the child lock to
the vertical position.
Page 32 of 263
30Keys, doors and windowsChild locks, electric
Remotely operated system to prevent
opening of the rear doors using their
interior controls and use of the rear
electric windows. The control is
located in the centre console in front
of the selector lever.
Switching on
Press R. The indicator lamp in the
button comes on, accompanied by a
confirmation message. This indicator
lamp remains on until the child lock is
switched off.
Switching off
Press R again. The indicator lamp on
button goes off, accompanied by a
confirmation message. This indicator
lamp remains on while child lock is
switched on.Doors
Load compartment TailgateOpening
After unlocking, press the touchpad
switch under the tailgate moulding
and open the tailgate.
Page 33 of 263

Keys, doors and windows31Closing
Use the interior handle.
Do not push the touchpad switch
whilst closing as this will unlock the
tailgate again.
Central locking system 3 24.
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
trapped during operating and no
one is standing within the moving
area.
The power tailgate can be operated
by:
● Pressing P longer on the
electronic key.
● Handsfree operation with motion sensor below the rear bumper.
● The touchpad switch under the exterior tailgate moulding andT in the open tailgate.
On vehicles with automatic
transmission, the tailgate can only be operated when the vehicle is
stationary and automatic
transmission in P.
The turn signal lights flash and a
chime sounds when the power
tailgate is operating.
Notice
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 24.
Operation with the electronic key