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26Keys, doors and windowsLocking
Press the button on any exterior door
handle.
All doors, load compartment and fuel
filler flap are locked.
The system only locks if any of the
following occurs:
● It has been more than 5 seconds since unlocking.
● The button on an exterior handle has been pressed twice within
5 seconds.
● Any door has been opened and then all doors are closed.
If the driver's door is not closed
properly or the electronic key remains in the vehicle and the ignition is not
off, locking will not be permitted and a warning tone sounds three times.
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 and the doors can be
unlocked by pressing the button
under the tailgate moulding when
electronic key is in range.
Passive Locking
See 'Automatic locking' 3 27.
Confirmation
Operation of central locking system is
confirmed by the hazard warning
flashers.
Central locking buttonsLocks or unlocks all doors, the load
compartment and fuel filler flap from
the passenger compartment by a
switch in the driver's door panel.
Press e to lock.
Press c to unlock.
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Keys, doors and windows27Fault in radio remote control unit
or electronic key system
Manual unlocking
Manually unlock the driver's door by
turning the key in the lock. Switch on
the ignition and press the central
locking button c to unlock all doors,
load compartment and fuel filler flap.
By switching on the ignition, the anti-
theft locking system is deactivated.
Manual locking
Manually lock the driver's door by
turning the key in the lock.
Fault in central locking system
Manual unlocking
Manually unlock the driver's door by
turning the key in the lock. The other
doors can be opened by pulling the
interior handle twice. The load
compartment and fuel filler flap
cannot be opened. To deactivate the
anti-theft locking system, switch on
the ignition 3 34.
Manual locking
Push inside locking knob of all doors
except driver's door. Then close the
driver's door and lock it from the
outside with the key. The fuel filler flap
and tailgate cannot be locked.
Automatic locking Automatic 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 key is removed from
the ignition switch, or with electronic
key system when the ignition is
switched off.
Activation or deactivation of
automatic locking can be set in the
menu Settings , I Vehicle in the
Colour-Info-Display.
Colour-Info-Display 3 117.
Vehicle personalisation 3 121.
The setting can be saved for the
remote control or electronic key being used 3 23.
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
remote control or 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
Colour-Info-Display.
Colour-Info-Display 3 117.
Page 31 of 327
Keys, doors and windows29Doors
Load compartment Tailgate
Opening
5-door Hatchback, Sports Tourer,
Country Tourer
After unlocking, press the button
under the tailgate moulding and open the tailgate manually.
4-door Saloon
Press x on radio remote control
until the tailgate is opened
automatically, or press the button
under the tailgate moulding after
unlocking.
Central locking system 3 24.
Closing
Use the interior handle.
Do not pull the button under the
moulding whilst closing as this will unlock the tailgate again.
Central locking system 3 24.
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30Keys, doors and windowsPower tailgate9Warning
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 is operated by:
● x on the radio remote control.
● The switch G in the door panel
of the driver's door.
● The touchpad switch and G in
the tailgate.
On vehicles with automatic transmission, the tailgate can only be operated when the vehicle is
stationary and automatic
transmission in P.
The tail 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 remote control, it is not necessary to
unlock the vehicle. Unlock the
vehicle first when operating with the
touchpad switch or the switch in the
driver's door. Lock the vehicle after
closing.
Central locking system 3 24.
Operation with radio remote control
Press and hold x until the tailgate
starts to open or close.
Operation with the switch in the
driver's door
Press and hold G until the tailgate
starts to open or close.
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Keys, doors and windows33smelled, could enter the vehicle.
This can cause unconsciousness and even death.Caution
Before opening the tailgate, check overhead obstructions, such as a
garage door, to avoid damage to
the tailgate. Always check the
moving area above and behind the
tailgate.
Notice
Power tailgate: If the lifters of the
open tailgate lose pressure, the
tailgate falls a bit and will then be
stopped by the system. Following
the tailgate will be power opened
and closed. During this the tail lights will flash and a chime will sound.
After closing, the tailgate may not be operated until it has been serviced
by a workshop.
Notice
The operation of the power tailgate
is disabled under low vehicle battery
conditions. In this case, the tailgate
may not even by manually operable.
Notice
With the power tailgate disabled and
all doors unlocked, the tailgate can
only be operated manually. In this
event, manually closing the tailgate
requires significantly greater force.
Notice
At low outside temperatures the
tailgate may not open fully by itself.
In this case lift the tailgate manually
to its normal end position.
Notice
The installation of certain heavy
accessories onto the tailgate may
affect its ability to remain open.Vehicle security
Anti-theft locking system9 Warning
Do not use the system if there are
people in the vehicle! The doorscannot be unlocked from the
inside.
The system deadlocks all the doors. All doors must be closed and the
electronic key must not remain in the
vehicle. Otherwise the system cannot
be activated.
If the ignition was on, the driver's door
must be opened and closed once so
that the vehicle can be secured.
Unlocking the vehicle disables the
mechanical anti-theft locking system.
This is not possible with the central
locking button in the passenger
compartment.
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34Keys, doors and windowsActivating
Radio remote control or electronic
key: press e twice within 5 seconds.
Anti-theft alarm system The anti-theft alarm system is
operated in conjunction with the
central locking system.
It monitors: ● doors, tailgate, bonnet
● passenger compartment including adjoining load
compartment
● vehicle inclination, e.g. if it is raised
● ignition
Activation All doors must be closed and the
electronic key must not remain in the
vehicle. Otherwise the system cannot
be activated.
● Radio remote control: self- activated 30 seconds after
locking the vehicle by pressing e
once.
● Electronic key system: self- activated 30 seconds after
locking the vehicle by pressing the button on any exterior door
handle.
● Radio remote control or electronic key: directly by
pressing e twice within
5 seconds.
● Electronic key system with passive locking enabled: briefly
activated after passive locking
occurs.
Notice
Changes to the vehicle interior such
as the use of seat covers, and open
windows or sunroof, could impair the
function of passenger compartment
monitoring.
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36Keys, doors and windowsThe system is not deactivated when
unlocking the driver's door with the
key or with the central locking button
in the passenger compartment.
AlarmWhen triggered, the alarm hornsounds and the hazard warning lights
flash simultaneously. The number
and duration of alarm signals are
stipulated by legislation.
The anti-theft alarm system can be
deactivated only by pressing c or by
pressing the switch on the door
handle (electronic key system) or
switching on the ignition.
A triggered alarm, which has not been interrupted by the driver, will be
indicated by the hazard warning
lights. They will flash quickly three
times when the vehicle is unlocked
next time with the radio remote
control. Additionally, a warning
message is displayed in the Driver
Information Centre after switching on
the ignition.
Vehicle messages 3 119.If the vehicle's battery is to be
disconnected (e.g. for maintenance
work), the alarm siren must be
deactivated as follows: switch the
ignition on then off, then disconnect
the vehicle's battery within
15 seconds.
Immobiliser The system is part of the ignition
switch and checks whether the
vehicle is allowed to be started with
the key being used.
The immobiliser is activated
automatically after the key is removed
from the ignition switch.
If control indicator d flashes when the
ignition is on, there is a fault in the
system; the engine cannot be started. Switch off the ignition and repeat start
attempt.
If control indicator d continues
flashing, attempt to start the engine
using the spare key and seek the
assistance of a workshop.Notice
The immobiliser does not lock the
doors. You should always lock the
vehicle after leaving it and switch on the anti-theft alarm system 3 24,
3 34.
Control indicator d 3 109.
Page 126 of 327

124Instruments and controlsRear Park Assist Symbols: Activates
or deactivates the rear park assist
symbols.
Return to Factory Settings
Restore Vehicle Settings : Resets all
settings to the default settings.
Clear All Private Data : Deletes all
private information from the vehicle.
Restore Radio Settings : Resets all
radio settings to the default settings.
See Infotainment manual.
Software Information
See Infotainment manual.OnStar® system
OnStar is a personal connectivity and mobility assistant with integrated
Wi-Fi hotspot. The OnStar service is
available 24 hours a day, seven days
a week.
Notice
OnStar is not available for all
markets. For further information,
contact your workshop.
Notice
In order to be available and
operational, OnStar needs a valid
OnStar subscription, functioning
vehicle electrics, mobile service and
GPS satellite link.
To activate the OnStar services and
set up an account, press Z and speak
with an OnStar advisor.
Depending on the equipment of the vehicle, the following services areavailable:
● OnStar emergency services and support in the case of a vehicle
breakdown
● Wi-Fi hotspot● OnStar smartphone application
● OnStar remote services, e.g. location of the vehicle, activation
of horn and lights, control of
central locking system
● Stolen vehicle assistance
● Vehicle health check
● Destination download
Notice
All functions requiring data
connection to the vehicle are no
longer available if the vehicle ignition
has not been turned on for ten days.
OnStar buttons