Page 24 of 219
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 43.
Trip computer
Functions:
■ Range
■ Instantaneous consumption
■ Distance
■ Average speed
■ Absolute consumption
■ Average consumption
■ Stop watch
■ Tyre pressure
Trip computer 3 103, 3 105.
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 3 101.
Page 28 of 219

26Keys, doors and windowsRadio 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 30.
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 29 of 219

Keys, doors and windows27
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
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 30 of 219
28Keys, doors and windows
If the ignition has been switched off
and the vehicle is stationary, the
steering wheel lock activates
automatically when the driver's door
is opened or closed.
Control indicator 0 3 92.
Notice
Do not put the electronic key in the
load compartment or in front of the
Info-Display.
The sensor fields in the door handles
must be kept clean to ensure
unrestricted functionality.
If the battery is discharged, the
vehicle must not be towed, tow-
started or jump-started as the
steering wheel lock cannot be
disengaged.Radio remote control
The electronic key likewise has a
radio remote control feature.
Emergency operation
If the radio remote control also fails,
the driver's door can be locked or
unlocked with the emergency key
contained in the electronic key: press locking mechanism and remove the
cap by applying light pressure. Push
emergency key towards the outside
over the detent and remove.
Page 31 of 219
Keys, doors and windows29
The emergency key can only lock or
unlock the driver's door. Unlocking the entire vehicle 3 30. 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 30.
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 3 101.
Batteries do not belong in household
waste. They must be disposed of at an appropriate recycling collection
point.
Page 32 of 219
30Keys, doors and windows
To replace the battery, press the
locking mechanism and remove the
cap by applying light pressure. Press
the cap on the other side outward.
Replace the battery (battery type
CR 2032), noting the installation
position. Engage caps.
Radio remote control
synchronisation
The radio remote control
synchronises itself automatically
during every starting procedure.
Fault
If the central locking cannot be
operated or the engine cannot be
started, the cause may be one of the
following:
■ Fault in remote control 3 26,
■ electronic key out of reception range.
To rectify the cause of the fault,
change the position of the electronic
key.
Central locking system Unlocks and locks doors, load
compartment and fuel filler flap.
A pull on an interior door handle
unlocks the entire vehicle and opens
the door.
Notice
In the event of an accident of a
certain severity, the vehicle unlocks
automatically.Unlocking
Radio remote control
Press button q.
Page 38 of 219

36Keys, doors and windows
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 89.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 30,
3 34.
Page 84 of 219

82Instruments and controls
Set date and time inTriple-Info-Display
The Infotainment system must be off. Activate setting mode by holding the
Ö button depressed for about
2 seconds. The flashing value is
adjusted using the ; button. The Ö
button is used to switch to the next
mode and to exit setting mode.
Automatic time synchronisation
The RDS signal of most VHF
transmitters automatically sets the
time, identified by } in the display.
Some transmitters do not send a
correct time signal. In such cases, we
recommend to switch off automatic
time synchronisation.
Activate setting mode and set it to
year setting. Hold the Ö button
depressed about 3 seconds until }
flashes in the display and “RDS TIME" appears. The function is
activated (RDS TIME 1) or
deactivated (RDS TIME 0) with
the ; button. Exit setting mode using
the Ö button.
Power outlets
Power outlets are located in the
centre console and in the luggage
compartment.
Do not damage the power outlets by
using unsuitable plugs. Connecting
electrical accessories while the
engine is off will discharge the
battery. Do not exceed the maximum