Page 26 of 189

24Keys, doors and windowsManual door locks
To unlock the tailgate, insert the key
into the lock and turn it anti-clockwise into a horizontal position. Lift the
tailgate to open it.
Closing
Use interior handle to lower and close the tailgate.
Do not press the touchpad switch
whilst closing as this will unlock the
tailgate again.
Central locking system 3 20.
Manual door locks
To lock the tailgate, insert the key into
the lock and turn it clockwise into a
vertical position.General hints for operating
tailgate9 Danger
Do not drive with the tailgate open
or ajar, e.g. when transporting
bulky objects, since toxic exhaust
gases, which cannot be seen or
smelled, could enter the vehicle.
This can cause unconsciousness
and even death.
Caution
Before opening the tailgate, check overhead obstructions, e.g. a
garage door, to avoid damage to
the tailgate. Always check the
moving area above and behind the
tailgate.
Notice
The installation of certain heavy
accessories onto the tailgate may
affect its ability to remain open.
Page 27 of 189

Keys, doors and windows25Vehicle security
Anti-theft alarm system
The anti-theft alarm system is
combined with the central locking
system.
It monitors: ● doors, tailgate, bonnet
● ignition
Status LED
Status LED is integrated in the sensor
on top of the instrument panel.
Status during the first 30 seconds of
anti-theft alarm system activation:LED illuminates:test, arming delayLED flashes
quickly:doors, tailgate or
bonnet not
completely closed,
or system fault
Seek the assistance of a workshop in the event of faults.
Deactivation Unlocking the vehicle by pressing c
deactivates anti-theft alarm system.
Alarm When triggered, the alarm horn
sounds and the hazard warning lights flash simultaneously. The number
and duration of alarm signals are
stipulated by legislation.
The alarm can be silenced by
pressing any button on the radio
remote control or by switching on the
ignition.
The anti-theft alarm system can only
be deactivated by pressing c on the
radio remote control or by switching
on the ignition.
Vehicle messages 3 79.
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 has been
removed from the ignition switch.
If the 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 the
start attempt.
If the control indicator continues
flashing, attempt to start the engine
using the spare key and seek the
assistance of a workshop.
Page 86 of 189

84Instruments and controlsTelematics service
OnStar OnStar is a personal connectivity and
service 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 advisor.Depending on the equipment of the vehicle, the following services areavailable:
● Emergency services and support
in the case of a vehicle
breakdown
● Wi-Fi hotspot
● Smartphone application
● Remote control, e.g. location of the vehicle, activation of horn and
lights, control of central locking system
● Stolen vehicle assistance
● Vehicle diagnostics
● Destination download
Notice
The OnStar module of the vehicle is
deactivated after ten days without an
ignition cycle. Functions requiring a
data connection will be available
again after switching on the ignition.OnStar buttons
Privacy button
Press and hold j until a message is
heard to activate or deactivate the
transmission of the vehicle location.
Press j to answer a call or to end a
call to an advisor.
Press j to access the Wi-Fi settings.
Service button
Press Z to establish a connection to
an advisor.
Page 143 of 189
Vehicle care141After having changed defective fuses
close the fuse box cover and press
until it engages.
If the fuse box cover is not closed
correctly, malfunction may occur.
Instrument panel fuse box
The fuse box is located on the driver's
side behind a cover in the instrument
panel.
To open the compartment, compress
the locking tabs, fold cover down and
remove.
No.Circuit1Onstar2Air conditioning system3Instrument cluster4Transmission control module5Infotainment6–7Rear parking assist8Data link connection9Electric steering column lock10Sensing and Diagnostic module11DC transformer12–13–14Linear power module15Central locking system/Ignition
system16Ignition system
Page 184 of 189

182IndexAAccessories and vehicle modifications .......................... 124
Adjustable air vents ...................100
Airbag and belt tensioners ...........68
Airbag deactivation ................43, 68
Airbag label................................... 38 Airbag system .............................. 38
Air conditioning regular operation ................................ 101
Air conditioning system ................ 95
Air intake .................................... 101
Air vents...................................... 100
Antilock brake system ................ 110
Antilock brake system (ABS) .......70
Anti-theft alarm system ................25
Appearance care ........................159
Ashtrays ....................................... 62
Autostop ..................................... 105
B Battery discharge protection ........93
Battery voltage ............................. 81
Belts.............................................. 36
Bonnet ....................................... 126
Bonnet open ................................. 72
Brake and clutch fluid .................163
Brake and clutch system .............69
Brake assist ............................... 111
Brake fluid .................................. 129Brakes ............................... 110, 129
Breakdown.................................. 158
Bulb replacement ....................... 132
C Catalytic converter .....................108
Central locking system ................20
Centre console storage ...............51
Centre high-mounted brake light 136
Changing tyre and wheel size ...148
Charging system .......................... 69
Child locks ................................... 22
Child restraint installation locations ................................... 47
Child restraints.............................. 44
Child restraint systems ................44
Cigarette lighter ........................... 62
City mode ................................... 113
Climate control ............................. 15
Climate control systems ...............94
Clock ............................................ 60
Code ............................................. 79
Control indicators.......................... 65
Control of the vehicle .................102
Controls ........................................ 58
Coolant and antifreeze ...............163
Cornering lights ............................ 89
Cruise control ...................... 72, 115
Cupholders .................................. 50
Curtain airbag system .................. 43