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20Keys, doors and windowsLock cylinders
Designed to free-wheel if they are
forcefully rotated without the correct
key or if the correct key is not fully
inserted. To reset, turn cylinder with
the correct key until its slot is vertical, remove key and then re-insert it. If the
cylinder still free-wheels, turn the key through 180° and repeat operation.
Key with foldaway key section
Press button to extend. To fold the
key, first press the button.
Radio remote control
Used to operate:
● central locking system
● anti-theft alarm system
The radio remote control has a range of approx. 20 metres. It can be
restricted by external 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:
● The range is exceeded.
● The battery voltage is 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 21.
Radio remote control battery
replacement
Replace the battery as soon as the
range reduces.
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Keys, doors and windows21
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
sideways. Replace the battery
(battery type CR 2032), paying
attention to the installation position.
Close the unit and synchronise.
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 the ignition is
switched on.
Memorised settings
Whenever the key is removed from
the ignition switch, the following
settings are automatically memorised by the key:
● lighting
● presets for Infotainment system
● central locking system
● comfort settings
The saved settings are automatically
used the next time the memorised key
is inserted into the ignition switch and
turned to position 1 3 104.
A precondition is that Personalization
By Driver is activated in the personal
settings of the Info-Display.
This must be set for each key used.
Vehicle personalisation 3 82.Central locking system
Unlocks and locks doors and load compartment.
Notice
In the event of an accident in which
airbags or belt pretensioners are
deployed, the vehicle is
automatically unlocked.
Unlocking
Press c.
Page 31 of 197

Keys, doors and windows29OverloadIf the windows are repeatedly
operated at short intervals, the
window operation is disabled for
some time.
Initialising the power windows
If the windows cannot be opened or
closed automatically (e.g. after
disconnecting the vehicle battery),
activate the window electronics as
follows:
1. Close the doors.
2. Switch on ignition.
3. Close the window completely and
operate the button for an
additional two seconds.
4. Repeat this procedure for each window.Heated rear window
Operated by pressing Ü.
Rear window heating works with the engine running.
It is switched off automatically after a
short time.
Sun visors
The sun visors can be folded down or swivelled to the side to prevent
dazzling.
The integral mirrors should be closed
when driving.
Roof
Sunroof9 Warning
Take care when operating the
sunroof. Risk of injury, particularly to children.
Keep a close watch on the
movable parts when operating
them. Ensure that nothing
becomes trapped in them as they
move.
Operable via a rocker switch with
ignition on (position 2) 3 104.
Retained power off 3 105.
Page 95 of 197
Lighting93Lighting features
Exit lighting Path lighting
Headlights, tail lights and number plate lights illuminate the surrounding area for an adjustable time after
leaving the vehicle.
Activating
1. Switch off the ignition.
2. Remove the ignition key.
3. Open driver's door.
4. Pull the turn signal lever.
5. Close the driver's door.
If the driver's door is not closed the
lights switch off after two minutes.
Exit lighting is switched off
immediately if the turn signal lever is
pulled while the driver's door is open.
Activation, deactivation and duration
of this function can be changed in the Info-Display. Vehicle personalisation
3 82.
The settings can be saved for the key being used 3 21.
Battery discharge protection
Switching off electric lights
To prevent discharge of the vehicle
battery when the ignition is switched off, some interior lights are switched
off automatically after some time.
Page 106 of 197

104Driving and operatingUse only floor mats, which fit properly
and are fixed by the retainers on the
driver side.
Driving downhill
Engage a gear when driving downhill to ensure that sufficient brake
pressure is available.
Steering If power steering assist is lost
because the engine stops or due to a system malfunction, the vehicle can
be steered but may require increased
effort.
Control indicator c 3 70.Caution
Vehicle equipped with electric
power steering:
If the steering wheel is turned until it reaches the end of its travel and
is held against that position for an
extended period of time, power
steering assistance may be
reduced.
If the steering assistance is used
for an extended period of time,
power assistance may be
reduced.
Power steering assistance should
return back to normal when the
system has cooled down.Starting and operating
New vehicle running-in Do not brake unnecessarily hard for
the first few journeys.
During the first drive, smoke may
occur because of wax and oil
evaporating off the exhaust system.
Park the vehicle in the open for a
while after the first drive and avoid
inhaling the fumes.
During the running-in period, fuel and engine oil consumption may be
higher.
Autostop may be inhibited to allow for
charging of the vehicle battery.
Ignition switch positions
Turn key:
Page 108 of 197

106Driving and operatingBefore restarting or to switch off the
engine, turn the key back to position
0 .
During an Autostop, the engine can
be started by depressing the clutch
pedal.
Starting the vehicle at low
temperatures
The start of the engine without
additional heaters is possible down to -30 °C.
Required is an engine oil with the correct viscosity, the correct fuel,
performed services and a sufficiently
charged vehicle battery.
Automatic starter control This function controls the engine
starting procedure. The driver does
not need to hold the key in position 3.
Once applied, the system will go on starting automatically until the engine
is running. Because of the checking
procedure, the engine starts running
after a short delay.Possible reasons for a non-starting
engine:
● clutch pedal not operated (manual transmission)
● brake pedal not operated (manual transmission
automated)
● timeout occurred
Turbo engine warm-up Upon start-up, engine available
torque may be limited for a short time,
especially when the engine
temperature is cold. The limitation is
to allow the lubrication system to fully
protect the engine.
Overrun cut-off
The fuel supply is automatically cut-
off during overrun, i.e. when the
vehicle is driven with a gear engaged
but accelerator is released.
Stop-start system
The stop-start system helps to save
fuel and to reduce the exhaust
emissions. When conditions allow, itswitches off the engine as soon as the
vehicle is at a low speed or at a
standstill, e.g. at a traffic light or in a
traffic jam.
On vehicles with manual
transmission, the engine is started automatically as soon as the clutch is depressed.
On vehicles with manual transmission
automated, the engine is started
automatically as soon as the brake
pedal is released.
A vehicle battery sensor ensures that
an Autostop is only performed if the
vehicle battery is sufficiently charged
for a restart.
Activation
The stop-start system is available as
soon as the engine is started, the
vehicle starts-off and the conditions
as stated below in this section are fulfilled.