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32Keys, doors and windows
Press the m button: the doors are
locked or unlocked.
The LED in the button m illuminates
for approx. 2 minutes after locking
with the radio remote control.
If the doors are locked from the inside
whilst driving, the LED remains lit.
Fault in remote control or
electronic key
Unlocking
Turn key or emergency key 3 27 in
the driver's door lock as far as it will go. The entire vehicle is unlocked
when the driver's door is opened.
Locking
Close the driver's door, open the
passenger door, press central locking
button m. The vehicle is locked.
Close the passenger door.
Fault in central locking system
Unlocking
Turn key or emergency key 3 27 in
the driver's door lock as far as it will
go. The other doors can be opened by using the interior handle (not possibleif the anti-theft locking system is
active). The load compartment and
fuel filler flap remain locked. To
deactivate the anti-theft locking
system, switch on the ignition 3 34.Locking
Insert key or emergency key 3 27 into
opening above lock on inside of door
and operate lock by pressing until it
clicks. Then close the door. The
procedure must be carried out for
each door. The driver's door can also
be locked from the outside with the
key. The fuel filler flap and tailgate
cannot be locked.
Page 36 of 219
34Keys, doors and windowsVehicle 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.
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Keys, doors and windows35
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)
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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 42 of 219
40Keys, doors and windows
Operate the control to open or close
the window.
For vehicles with automatic feature
pull or press the switch again to stop
window movement.
Safety function
If the window glass encounters
resistance above the middle of the
window during automatic closing, it is immediately stopped and the window
opened again.
In the event of closing difficulties due
to frost or the like, operate the switch
several times to close the window in
stages.Child safety system for rear
windows
Switch z can be used to activate or
deactivate the switches in the rear
doors.
Operating windows from outside
The windows can be operated
remotely from outside the vehicle.
Radio remote control
Press q or p until all windows have
opened or closed.
Page 103 of 219

Instruments and controls101Vehicle messages
Messages are given via the
instrument panel display or as
warning and signal buzzers. Check
control messages appear on the
Info-Display. Some appear in an
abbreviated form. Confirm warning
messages with the multifunction knob
3 94, 3 97.
Warning chimes When starting the engine or
whilst driving ■ If the electronic key is not present or is not recognised.
■ If seat belt is not fastened.
■ If a door or the tailgate is not fully closed when starting off.
■ If a certain speed is exceeded with the parking brake applied.
■ If the speed programmed at the factory is exceeded.
■ If the vehicle has automated manual transmission and the
driver's door is opened when theengine is running, a gear is
engaged and the foot brake is not
depressed.
When the vehicle is parked and
the driver's door is opened ■ When the key is in the ignition switch.
■ With exterior lights on.
■ With Open&Start system and automatic transmission, if the
selector lever is not in P.
■ For automated manual transmission, if the parking brake is
not applied and no gear is engaged when the engine is switched off.
Battery voltage
Low battery voltage in radio remote
control or electronic key. On vehicles
without check control, the message
InSP3 appears in the instrument
panel display. Replace the battery
3 26, 3 27.Brake light switch
Brake light does not come on during
braking. Have the cause of the fault
remedied immediately by a
workshop.
Engine cooling level
Low fluid level in engine cooling
system. Check coolant level 3 155.
Page 178 of 219

176Vehicle care
The tyre pressure tables show allpossible tyre combinations 3 206.
For the tyres approved for your
vehicle, refer to the EEC Certificate of Conformity provided with your vehicle
or other national registration
documents.
The driver is responsible for correct
adjustment of tyre pressure.9 Warning
If the pressure is too low, this can
result in considerable tyre warm-
up and internal damage, leading to tread separation and even to tyre
blow-out at high speeds.
Tyre pressure monitoring
system
The tyre pressure monitoring system
continually checks the pressure of all
four wheels when vehicle speed
exceeds a certain limit.
All wheels must be equipped with
pressure sensors and the tyres must
have the prescribed pressure.
When a low tyre condition is detected,
A illuminates. If A comes on, stop as
soon as possible and inflate the tyres as recommended in this manual. Tyre pressures 3 206.
After inflating the tyres to the
appropriate pressure, A may stay
illuminated. Pressure change will be
recognized as the vehicles is driven.
Notice
In countries where the tyre pressure
monitoring system is legally
required, the use of wheels without
pressure sensors will invalidate the
vehicle type approval.
The current tyre pressures may be
shown in the Info-Display 3 107.
Vehicle messages, tyre pressure 3 102.
Control indicator w 3 91.
If the tyre pressure shall be reduced
or increased, switch off ignition.
w may come on in cool weather when
the vehicle is first started and then
turn off as the vehicle is driven. Thiscould be an early indicator that the air
pressure is getting low and needs to
be inflated to the proper pressure.
A spare or temporary spare wheel is
not equipped with pressure sensors.
The tyre pressure monitoring system
is not operational for these wheels
and w illuminates.
Winter tyres or additional wheel sets
have to be fitted with sensors,
otherwise the system will not work
and w will indicate malfunction by
flashing one minute and then
illuminate continuously.
The use of commercially available
liquid tyre repair kits can impair the
function of the system. Factory-
approved repair kits can be used.
External high-power radio equipment
could disrupt the tyre pressure
monitoring system.
Unsuited rims can impair the
transmission quality of the tyre
pressure monitoring system sensors.
Page 211 of 219

Customer information209Customer informationCustomer information................209
Vehicle data recording and pri‐
vacy ........................................... 209Customer information
Declaration of conformity
This vehicle has systems that
transmit and/or receive radio waves
subject to Directive 1999/5/EC.
These systems are in compliance with the essential requirements and
other relevant provisions of Directive
1999/5/EC. Copies of the original
Declarations of Conformity can be
obtained on our website.Vehicle data recording
and privacy
Event data recordersData storage modules in thevehicle
A large number of electronic
components of your vehicle contain
data storage modules temporarily or
permanently storing technical data
about the condition of the vehicle,
events and errors. In general, this
technical information documents the
condition of parts, modules, systems
or the environment:
■ Operating conditions of system components (e.g. filling levels)
■ Status messages of the vehicle and
its single components (e.g. number
of wheel revolutions / rotational
speed, deceleration, lateral
acceleration)
■ Dysfunctions and defects in important system components