Page 20 of 217

18In brief
If the vehicle is on a downhill slope,
engage reverse gear or set the
selector lever to P before switching
off the ignition. Turn the front
wheels towards the kerb.
■ Lock the vehicle and activate the anti-theft alarm system with button
p on the radio remote control or
with the sensor in a front door
handle.
To activate the anti-theft locking
system, press button p twice or
touch the sensor in a front door
handle twice.
■ Do not park the vehicle on an easily
ignitable surface. The high
temperature of the exhaust system
could ignite the surface.
■ On vehicles with manual transmission automated, control
indicator R flashes for a few
seconds after the ignition is
switched off if the parking brake has
not been applied 3 100.
■ Close windows.■ The engine cooling fans may run after the engine has been switchedoff 3 152.
■ After running at high engine speeds
or with high engine loads, operate the engine briefly at a low load or
run in neutral for approx.
30 seconds before switching off, in
order to protect the turbocharger.
Keys, locking 3 26, Laying the
vehicle up for a long period of time
3 151.
Page 24 of 217
22In briefActive head restraints on
front seats
In the event of a rear-end impact, the active head restraints tilt forwards
slightly. The head is more effectively
supported by the head restraint and
the risk of whiplash injury is reduced.
Active head restraints can be
recognised by the word ACTIVE.
Head restraints 3 44.
Trip computer
Functions:
■ Range
■ Instantaneous consumption
■ Distance
■ Average speed
■ Absolute consumption
■ Average consumption
■ Stop watch
■ Tyre pressure
Trip computer 3 102, 3 104.
Check control
The check control monitors:
■ Fluid levels
■ Tyre pressure
■ Radio remote control battery
■ Anti-theft alarm system
■ Important exterior lighting bulbs, including cables and fuses.
Display messages 3 100.
Page 29 of 217

Keys, doors and windows27Radio remote control
Used to operate:■ Central locking system,
■ Anti-theft locking system,
■ Anti-theft alarm system,
■ Power windows.
The radio remote control has a range of approx. 5 metres. This range can
be affected by outside influences.
The hazard warning flashers confirm
operation.
Handle 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, it may be due to the following:
■ Range exceeded,
■ Battery voltage too low,
■ Frequent, repeated operation of the
radio remote control while not in
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.
Unlocking 3 31.
Radio remote control battery replacement
Replace the battery as soon as the
range reduces.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.Key with foldaway key section
Extend the key and open the unit.
Replace the battery (battery type CR 2032), paying attention to the
installation position. Close the unit
and synchronise.
Key with fixed key section
Have the battery replaced by a
workshop.
Page 30 of 217

28Keys, doors and windows
Radio remote controlsynchronisation
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
ignition.
Memorised settings Whenever the vehicle is locked the
last settings are automatically saved
specifically for the used key:
■ Electronic climate control,
■ Info-Display,
■ Infotainment system,
■ Instrument panel illumination.
The saved settings are automatically used next time that key is used for
unlocking.Open&Start system
Makes operation of the following
possible without the use of the
mechanical key
■ Central locking system,
■ Anti-theft locking system,
■ Anti-theft alarm system,
■ Power windows,
■ Ignition and starter.
The electronic key simply needs to be in the driver's possession.
Press the Start/Stop button. The
ignition is switched on. The
immobiliser and steering wheel lock
are deactivated.
To start the engine press and hold the
Start/Stop button whilst applying both
the brake and clutch pedals.
Automatic transmission: the engine
can only be started with the selector
lever in P or N.
The engine and the ignition are
switched off by pressing the Start/
Stop button again. The vehicle must
be stationary. The immobiliser is
activated at the same time.
Page 32 of 217
30Keys, doors and windows
The emergency key can only lock or
unlock the driver's door. Unlocking the entire vehicle 3 31. On vehicles
with anti-theft alarm system, the
alarm may be triggered when the
vehicle is unlocked. Deactivate the
alarm by switching on the ignition.Hold the electronic key at the marked
position and press the Start/Stop
button.
To switch off the engine, press the
Start/Stop button for at least
2 seconds.
Lock the driver's door with the
emergency key. Locking the entire vehicle 3 31.
This option is intended for
emergencies only. Seek the
assistance of a workshop.
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
InSP3 in the service display or by a
check control message in the
Info-Display 3 100.
Batteries do not belong in household
waste. They must be disposed of at an appropriate recycling collection
point.
Page 37 of 217
Keys, doors and windows35Vehicle 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 or 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.
Activating with the radio remote
control
Press p twice within 15 seconds.
Activating with the electronic
key
Touch the sensor field in the front
door handle twice within 15 seconds.
The electronic key must be outside the vehicle, within a range of approx.1 metre.
Anti-theft alarm system The anti-theft alarm system is
operated in conjunction with the
central locking system.
Page 38 of 217

36Keys, doors and windows
It monitors:■ Doors, load compartment, bonnet,
■ Passenger compartment,
■ Vehicle inclination, e.g. if it is raised,
■ Ignition.
Activation
The system is activated by pressing
p on the radio remote control or by
touching the sensor field in the front
door handle.
Notice
Changes to the vehicle interior such
as the use of seat covers and open
windows, could impair the function
of passenger compartment
monitoring.Activation without monitoring of
passenger compartment and
vehicle inclination
Switch off the monitoring of
passenger compartment and vehicle
inclination, when animals are being
left in the vehicle, because of high
volume ultrasonic signals or
movements triggering the alarm. Switch off as well, when the vehicle is
on a ferry or train.
1. Close load compartment, bonnet and windows.
2. Press button b. The LED in button
m flashes for a maximum of
10 seconds
3. Close doors.
4. Activate the anti-theft alarm system. The LED illuminates.
After approx. 10 seconds, the
system is armed. The LED flashes until the system is deactivated.
Light-emitting diode (LED)
Page 39 of 217

Keys, doors and windows37
During the first 10 seconds of anti-
theft alarm system activation:LED illu‐
minates=Test, ignition delay,LED
flashes
quickly=Door, load
compartment or bonnet open, or system fault.
After the first 10 seconds of anti-theft
alarm system activation:
LED flashes
slowly=System active,LED comes on for
approx. 1 second=Switch off
function.
Seek the assistance of a workshop in
the event of faults.
Deactivation
Unlocking the vehicle deactivates the
anti-theft alarm system.
Alarm
When triggered, the alarm gives off
an acoustic signal (horn) and a visual signal (hazard warning flashers). The
number and duration of which are
stipulated by legislation.
The alarm siren can be silenced by
pressing a button of the radio remote
control or by switching on the ignition.
The anti-theft alarm system can be
deactivated only by pressing button
p or by switching on the ignition.
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 checks whether the
vehicle is allowed to start with the key being used. If the transponder in the
key is recognised, the engine can be
started.
The immobiliser is going to be
activated automatically after the key
has been removed from the ignition
switch or when the engine is switched
off by pressing the Start/Stop button.
Control indicator A 3 88.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 31,
3 35.