Page 23 of 329

Keys, doors and windows21battery replacement is indicated by a
message in the Driver Information
Centre 3 125.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
To replace:
1. Press button at the back of the electronic key unit and extract thekey blade from the housing.
2. Insert the key blade again for approx. 6 mm and turn the key to
open the housing. 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
Enables operation of the following
functions via the use of the remote control buttons:
● central locking system 3 25
● anti-theft locking system 3 34
● anti-theft alarm system 3 34
● power windows 3 40
● sunroof 3 43
The remote control has a range of up
to 100 metres , but may also be much
less due to external influences. The
hazard warning flashers confirm
operation.
Page 24 of 329

22Keys, doors and windowsHandle with care, protect from
moisture and high temperatures and
avoid unnecessary operation.
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 25.Electronic key system
Enables a keyless operation of the
following functions:
● central locking system 3 25
● switching on ignition and starting the engine 3 165
The electronic key simply needs to be on the driver's person.
Additionally, the electronic key
includes the functionality of the radio
remote control:
● central locking system
● anti-theft alarm system
● power windows
The hazard warning flashers confirm
operation.
Handle the device with care, protect
from moisture and high temperatures
and avoid unnecessary operation.
Note
Do not put the electronic key in the
load compartment.
Electronic key system operation
The electronic key must be outside
the vehicle, within a range of approx.
one metre of the relevant door side.
Page 25 of 329

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 3 127.
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 and opening the tailgate
The tailgate can be unlocked and
opened handsfree via moving the foot below the rear bumper or by pushing
the touchpad switch under the brand
emblem when the electronic key is in
range. The doors remain locked.
Load compartment 3 28.
Page 26 of 329

24Keys, doors and windowsOperation 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 3 121.
Vehicle personalisation 3 127.
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 3 127.
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.
Page 27 of 329

Keys, doors and windows25Manual unlocking 3 25.
Memorised settings
Whenever the ignition is switched off, the following settings are
automatically memorised by the
electronic key:
● automatic climate control
● lighting
● Infotainment system
● central locking system
● Sport mode settings
● comfort settings
The 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 AutoMemory Recall is activated in the
Info-Display for the memorised
electronic key.
Power seat 3 50.
Vehicle personalisation 3 127.
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 3 127.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 e to lock. LED in button
illuminates.
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.
Page 28 of 329
26Keys, doors and windows
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.
Manual 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.
Page 29 of 329

Keys, doors and windows27
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 3 121.
Vehicle personalisation 3 127.
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 3 121.
Vehicle personalisation 3 127.
The setting can be saved for each electronic key being used 3 25.Passive locking
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 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 functionremains disabled until the central
locking button e is pressed or the
ignition is switched on.
Page 30 of 329
28Keys, doors and windowsActivation or deactivation of passive
locking can be set in the menu
Settings , I Vehicle in the Info-Display.
Info-Display 3 121.
Vehicle personalisation 3 127.
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.Doors
Load compartment
Tailgate OpeningGrand Sport
After unlocking, push the brand
emblem and open the tailgate.