Keys, doors and windows192. Insert the key blade for approx.6 mm and turn the key to open thehousing. Further insertion of the
key blade can damage the
housing.
3. Remove and replace battery. Use
CR 2032 or equivalent battery.
Pay attention to the installation
position.
4. Close the housing and insert key blade.
Radio remote control
synchronisation
After replacing the battery, unlock the
door with the key in the driver's door
lock. The radio remote control will be
synchronised when you switch on the
vehicle.
Fault
If the central locking system cannot
be operated with the radio remote
control, the cause may be one of the
following:
● Fault in radio remote control.
● The range is exceeded.
● The battery voltage is too low.● Frequent, repeated operation of the radio remote control while notin range, which will require re-
synchronisation.
● 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.
Manual unlocking 3 20.
Electronic key systemEnables a keyless operation of the
following functions:
● central locking system 3 20
● tailgate 3 28
● starting and stopping the vehicle 3 151
The electronic key simply needs to be on the driver's person.
Additionally, the electronic key
includes the functionality of the radio
remote control 3 17.
Handle with care, protect from
moisture and high temperatures and
avoid unnecessary operation.
Note
Do not put the electronic key into the
load compartment or in front of the
Info-Display.
Replacing 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 90.
20Keys, doors and windowsBattery replacement, in Radio remotecontrol 3 17.
Electronic key synchronisation
The electronic key synchronises itself automatically during every starting
procedure.
Fault
If the central locking cannot be
operated or the propulsion system
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 20.Memorised settings
Whenever the vehicle is switched off, the following settings are
automatically memorised by the
electronic key:
● automatic climate control
● lighting
● Infotainment system
● central locking system
● comfort settings
The saved settings are automatically
used the next time the vehicle is
switched on with the memorised
electronic key 3 19.
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.
Vehicle personalisation 3 92.
Central locking system
Unlocks and locks doors, load
compartment and charge port door.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
remote control the doors are locked
automatically if no door has been
opened. A precondition is that the
setting is activated in the vehicle
personalisation 3 92.
Keys, doors and windows21Remote control operationUnlocking
Press (.
Unlocking mode can be set in the vehicle personalisation menu in the
Info display. Two settings are
selectable:
● All doors, load compartment and charge port door will be unlocked
by pressing ( once.
● Only the driver's door, load compartment and charge portdoor will be unlocked by pressing
( once. To unlock all doors,
press ( twice.
Select the relevant setting in Settings,
I Vehicle in the Info display.
Info display 3 86.
Vehicle personalisation 3 92.
The setting can be saved for the remote control being used.
Memorised settings 3 20.
Unlocking and opening the tailgate 3 28.
Locking
Close doors, load compartment and
charge port door.
Press ).
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 92.
Electronic key system operation
The electronic key must be outside
the vehicle, within a range of approx. one metre of the relevant door side.
22Keys, doors and windowsUnlocking
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 charge port door will be unlocked
by pressing the button on any
exterior handle once.
● Only the driver's door, load compartment and charge portdoor will be unlocked by pressing
the button on the driver's doorexterior handle once. To unlock
all doors, press button twice.
The setting can be changed in the
menu Settings in the Info display.
Vehicle personalisation 3 92.
Locking
Press the button on any exterior door
handle.
All doors, load compartment and
charge port door 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 vehicle is not off,
locking will not be permitted.
If there have been two or more
electronic keys in the vehicle and the
vehicle 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 by pushing the touchpad
switch when the electronic key is in
range. The doors remain locked.
Load compartment 3 28.
Keys, doors and windows23Operation with buttons on the
electronic key
The central locking system can also
be operated with the buttons on the
electronic key.
Press ( to unlock.
Press ) to lock.
Press and release ) and then
immediately press and hold O for at
least four seconds to start the
vehicle's heating or air conditioning systems and the heated rear window
from outside the vehicle.
Press 5 to stop charging the vehicle.
Press and hold 5 until the lock of the
charge cable is released.
Remote start 3 20, Remote control
operation 3 20.
Passive locking
Automatic locking 3 25.
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 92.
Central locking buttons Locks or unlocks all doors, the load
compartment and charge port door
via a switch in the driver's door panel.
Press ) to lock.
Press ( 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
mechanical key.
The lock cylinder in the driver's door
is covered by a cap.
24Keys, doors and windows
To remove the cap, press button at
the back and extract the key blade
from the housing. Insert the key into
the recess at the bottom of the cap
and swivel the key upward.
Electronic key system 3 19.
Manual unlocking
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 twice or by pressing ( in the driver's door panel.
The load compartment and charge
port door will possibly not be
unlocked.
By switching on the vehicle, the anti-
theft locking system is deactivated.
Manual locking
Push inside locking knob of all doors
except driver's door or press ) 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 charge port door and
tailgate are possibly not locked.
Keys, doors and windows25
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.
Delayed locking
This feature delays the actual locking of the doors and arming of the anti-
theft alarm system for five seconds when the power door lock switch or
electronic key is used to lock the
vehicle.
Delayed locking can only be turned
on when the Unlocked door anti
lockout feature has been turned off.
This can be changed in the vehicle
settings.
Vehicle personalisation 3 92.
On : When pressing the central
locking button ), three chimes will
sound to signal delayed locking is
activated.
The doors will not lock until five
seconds after the last door is closed. Delayed locking can be temporarily
overridden by pressing the central
locking button ) or ) on the
electronic key.
Off : The doors will lock immediately
when pressing the central locking
button ) or ) on the electronic key.
Automatic locking Automatic locking after driving off
This security feature can be
configured to automatically lock all
doors, load compartment and charge
port door after the shift lever is moved out of P.
When at a standstill after driving, the
vehicle will be unlocked automatically
as soon as the vehicle 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 86.
Vehicle personalisation 3 92.
The setting can be saved for the electronic key being used 3 20.
Automatic relock after unlocking
This feature can be configured to
automatically lock all doors, load
compartment and charge port door 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 86.
Vehicle personalisation 3 92.
The setting can be saved for the
electronic key being used 3 20.
26Keys, doors and windowsPassive lockingOn vehicles with electronic key
system, this 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 vehicle is not off,
passive locking will not be permitted.
If there have been two or more
electronic keys in the vehicle and the
vehicle 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 passengers remain in the vehicle, the system must be
disabled.
To disable the system, press the
central locking button ( for a few
seconds while one door is open. The function remains disabled until the
central locking button ) is pressed or
the vehicle 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 86.
Vehicle personalisation 3 92.
The setting can be saved for the
electronic key being used 3 20.
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.
Smartphone remote
function
This feature allows a smartphone to
be connected to the vehicle and
remote vehicle functions to be
requested. Features vary depending
on availability.
Features include: ● Remote commands: Use to lock/ unlock the vehicle, remote start
for the cabin climate, or sound or cancel the horn and flash the
lights.
● Vehicle status: View the vehicle’s
range and high voltage battery
level, charging status, and tyre
pressure.