Keys, doors and windows21
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.
Radio remote control
synchronisation
After replacing the battery, unlock the
door with the key in the driver's door
lock. The radio remote control is
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
■ Infotainment system
■ Central locking system
The saved settings are automatically used the next time the memorised key
is inserted into the ignition switch and
turned to position 1 3 121.A precondition is that Personalization
by driver is activated in the personal
settings of the Graphic-Info-Display.
This must be set for each key used.
On vehicles equipped with
Colour-Info-Display, the
personalisation is permanently
activated.
Vehicle personalisation 3 100.
Central locking system
Unlocks and locks doors, load
compartment and fuel filler flap.
A pull on an interior door handle
unlocks the respective door. Pulling
the handle again opens the door.
Notice
In the event of an accident in which
airbags or belt pretensioners are
deployed, the vehicle is
automatically unlocked.
Notice
A short time after unlocking with the
remote control the doors are locked
automatically if no door has been
opened.Unlocking
Radio remote control
Press button c.
Two settings are selectable: ■ To unlock only the driver's door, load compartment and fuel filler
flap; press button c once. To unlock
all doors; press button c twice
or
■ press button c once to unlock all
doors, load compartment and fuel
filler flap
22Keys, doors and windows
The setting can be changed in the
menu Settings in the Info-Display.
Vehicle personalisation 3 100.
The setting can be saved for the key
being used. Memorised settings
3 21.
Locking Close doors, load compartment and
fuel filler flap.
Press button e.
If the driver's door is not closed
properly, the central locking system will not work.
Central locking buttons
Locks or unlocks all doors, the load
compartment and fuel filler flap from
inside the passenger compartment.
The central locking buttons are
located in the driver's door.
Press the e button to lock.
Press the c button to unlock.
Fault in radio remote control
system
Unlocking
Manually unlock the driver's door by
turning the key in the lock. Switch on
the ignition and press the central
locking button c to unlock the other
doors, load compartment and fuel
filler flap. By switching on the ignition, the anti-theft locking system is
deactivated.
Locking
Manually lock the driver's door by
turning the key in the lock.
Keys, doors and windows23
Fault in central locking systemUnlocking
Manually unlock the driver's door by
turning the key in the lock. The other
doors can be opened by pulling the
interior handle twice. The load
compartment and fuel filler flap
cannot be opened. To deactivate the
anti-theft locking system, switch on
the ignition 3 25.
Locking
Push inside locking knob of all doors
except driver's door. Then close the driver's door and lock it from the
outside with the key. The fuel filler flap
and tailgate cannot be locked.
Delayed locking This feature will delay the actual
locking of the doors and arming of the
anti-theft alarm system for
five seconds when the power door
lock switch or radio remote control is
used to lock the vehicle.
This can be changed in the vehicle
settings.Vehicle personalisation 3 100.
ON : When pressing the central
locking button, three chimes will
sound to signal delayed locking is in
use.
The doors will not lock until
five seconds after the last door is
closed. You can temporarily override
delayed locking by pressing the
central locking button or the locking
button on the radio remote control.
OFF : The doors will lock immediately
when pressing the power lock switch
or the button e on the radio remote
control.
Automatic locking This security feature can be
configured to automatically lock all
doors, load compartment and fuel
filler flap as soon as a certain speed
is exceeded.
Additionally, it is configurable to
unlock the driver's door or all doors
after the ignition is switched off and
the ignition key is removed (manualtransmission) or the selector lever is
moved to position P (automatic
transmission).
Settings can be changed in the menu Settings in the Info-Display. Vehicle
personalisation 3 100.
The settings can be saved for the key being used 3 21.
Child locks
92Instruments and controls
■Traffic Sign Assistant : displays
detected traffic signs for the current
route section 3 144
■ Speed Warning : if exceeding the
preset speed, a warning chime will
be activated
Selection and indication can be
different between Midlevel-Display,
Uplevel-Display and Uplevel-Combi-
Display.
Trip/Fuel Information Menu
Press the MENU button to select the
Trip/Fuel Information Menu , or select
W on Uplevel-Combi-Display.
Turn the adjuster wheel to select a
submenu. Press the SET/CLR button
to confirm.
■ Trip odometer 1
■ Trip odometer 2
■ Digital speed
Trip odometer 2 and digital speed are
only available on vehicles with
Uplevel-Display or Uplevel-Combi-
Display.
On vehicles with trip computer more
submenus are available.Selection and indication can be
different between Midlevel-, Uplevel-, and Uplevel-Combi-Display.
Trip/Fuel Information Menu, Trip
Computer 3 97.
ECO Information Menu Press the MENU button to select
s in the top line of the Uplevel-
Combi-Display.
Turn the adjuster wheel to select a
submenu. Press the SET/CLR button
to confirm.
Submenus are:
■ Shift indication : Current gear is
indicated inside an arrow. The
graphic above recommends
upshifting for fuel saving reasons.
Eco index display : The current fuel
consumption is indicated on a segment display. For economical
driving, adapt your driving style to
keep the filled segments within the
Eco area. The more segments are
filled, the higher the fuel
consumption. Simultaneously the
current consumption value is
indicated.
■ Top Consumers : List of top comfort
consumers currently switched on is displayed in descending order. Fuel
saving potential is indicated. A
Instruments and controls93
switched-off consumer disappears
from the list and the consumption
value will be updated.
During sporadic driving conditions,
the heated rear window is activated automatically to increase engine
load. In this event, the heated rear
window is indicated as one of the
top consumers, without activation
by the driver.
■ Economy Trend : Displays the
average consumption development
over a distance of 50 miles. Filled
segments display the consumption
in 5 mile steps and shows the effect of topography or driving behaviour
on fuel consumption.
Graphic-Info-Display,
Colour-Info-Display Depending on the vehicle
configuration the vehicle has a
Graphic-Info-Display or Colour-Info-
Display . The Info-Display is located in
the instrument panel above the
Infotainment system.
Graphic-Info-DisplayGraphic-Info-Display indicates: ■ time 3 76
■ outside temperature 3 76
■ date 3 76
■ Infotainment system, see description in the Infotainment
system manual
■ settings for vehicle personalisation 3 100
Colour-Info-Display
122Driving and operating
Before 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.
Key lock release
Some vehicles with an automatic
transmission are equipped with an electronic key lock release system.
The key lock release is designed to
prevent ignition key removal unless
the selector lever is in P.
Starting the vehicle at low
temperatures
Starting the engine without additional
heaters is possible down to -25 °С for diesel engines and -30 °C for petrol
engines. Required is an engine oil
with the correct viscosity, the correct fuel, performed services and a
sufficiently charged battery. With
temperatures below -30 °C the
automatic transmission requires a
warming phase of approx. 5 minutes.
The selector lever must be in position P .Automatic Starter Control
This function controls the engine
starting procedure. The driver does
not have 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 or selector lever not in P or N
(automatic transmission)
■ 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, it
switches 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. It starts the engine
automatically as soon as the clutch is depressed. A battery sensor ensures
that an Autostop is only performed if
the 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.
126Driving and operating
take up to 25 minutes. Typically it
needs between 7 and 12 minutes.
Autostop is not available and fuel
consumption may be higher during
this period. The emission of smells
and smoke during this process is
normal.
Under certain driving conditions, e.g.
short distances, the system cannot
clean itself automatically.
If cleaning of the filter is required and if previous driving conditions did not
enable automatic cleaning, it will be
indicated by control indicator %.
% illuminates when diesel particle
filter is full. Start cleaning process as
soon as possible.
% flashes when diesel particle filter
has reached the maximum filling level. Start cleaning process
immediately to avoid damage to the
engine.
Cleaning process To activate cleaning process,
continue driving, keep engine speed
above 2000 revolutions per minute.
Shift down if necessary. Diesel
particle filter cleaning is then started.
If control indicator g also
illuminates, cleaning is not possible:
seek the assistance of a workshop.Caution
If the cleaning process is
interrupted, there is a risk of
provoking severe engine damage.
Cleaning takes place quickest at high engine speeds and loads.
The control indicator % extinguishes
as soon as the self-cleaning
operation is complete.
Catalytic converter
The catalytic converter reduces the
amount of harmful substances in the
exhaust gases.Caution
Fuel grades other than those listed on pages 3 148, 3 205 could
damage the catalytic converter or
electronic components.
Unburnt petrol will overheat and
damage the catalytic converter.
Therefore avoid excessive use of the starter, running the fuel tank
dry and starting the engine by
pushing or towing.
In the event of misfiring, uneven
engine running, a reduction in engine performance or other unusual
problems, have the cause of the fault
rectified by a workshop as soon as
possible. In an emergency, driving
148Driving and operating
At speeds below 35 mph the system
is inoperable.
Fault
The lane departure warning system
may not operate properly when:
■ the windscreen is not clean
■ there are adverse environmental conditions like heavy rain, snow,
direct sunlight or shadows
The system can not operate when no
lane marking is detected.Fuel
Fuel for petrol enginesOnly use unleaded fuel that complies
with European standard EN 228 or
E DIN 51626-1 or equivalent.
Your engine is capable to run with
E10 fuel that fulfills these standards.
E10 fuel contains up to 10 %
bioethanol.
Use fuel with the recommended
octane rating 3 205. Use of fuel with
too low an octane rating can reduce
engine power and torque and slightly increases fuel consumption.Caution
Do not use fuel or fuel additives
that contain metallic compounds
such as manganese-based
additives. This may cause engine
damage.
Caution
Use of fuel that does not comply to EN 228 or E DIN 51626-1 or
equivalent can lead to deposits or
engine damage and may affect
your warranty.
Caution
Use of fuel with too low an octane
rating could lead to uncontrolled combustion and engine damage.
Fuel for diesel engines
Only use diesel fuel that complies
with EN 590.
In countries outside the European
Union use Euro-Diesel fuel with a
sulphur concentration below 50 ppm.