Page 22 of 183

20Keys, doors and windowsRadio remote control
Used to operate:■ Central locking system 3 21
■ Anti-theft locking system 3 26
■ Power windows 3 29
The radio remote control has a range of up to 5 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:
■ Range exceeded
■ Battery voltage too low
■ Frequent, repeated operation of the
radio remote control while not in
range
■ 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.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 remove the
battery holder by undoing the screw
with a suitable screwdriver. Remove
the battery holder from the key and
replace the battery (type CR 2032),
paying attention to the installation
position.
Refit the battery holder in the key and
secure the screw.
Page 32 of 183
30Keys, doors and windows
OverloadIf the windows are repeatedly
operated within short intervals, the
window operation is disabled for
some time.
Initialising the power windows
If the windows cannot be closed
automatically (e.g. after
disconnecting the vehicle battery),
activate the window electronics as
follows:
1. Close doors.
2. Switch on ignition.
3. Pull switch until the window is closed and keep pulling for an
additional 5 seconds.
4. Repeat for each window.Child safety system for rear windows
Press switch , to deactivate rear
door power windows.
To activate, press , again.
Operating windows from outside
The windows can be operated
remotely from outside the vehicle
when locking or unlocking the vehicle.
Central locking system 3 21.
Press and hold the Ä button to open
windows.
Press and hold the e button to close
windows.
Release button to stop window
movement.
Page 105 of 183

Driving and operating103Starting 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 and the cleaning process of the diesel particle filter may take
place more often. Autostop may be inhibited to allow for charging the
battery.
Diesel particle filter 3 108.Ignition switch positionsSTOP=Steering wheel lock
released, ignition offMAR=Ignition on, for diesel
engine: preheatingAVV=StartingStarting the engine
Manual transmission: operate clutch
and brake.
Manual transmission automated: operate brake, the transmission
automatically shifts to N (neutral)
Do not operate the accelerator pedal. Diesel engine: turn the key to positionMAR for preheating until control
indicator ! extinguishes.
Turn the key briefly to position AVV
and release.
Page 106 of 183

104Driving and operating
Before restarting or to switch off the
engine, turn the key back to position
STOP .
Autostop
During an Autostop, the engine is restarted automatically by depressing
the clutch pedal.
Vehicles with manual transmission
automated (MTA): Shift to a forward
gear, release brake pedal or move lever to +, – or R to enable an
automatic restart.
Stop-start system 3 105.
Starting the vehicle at low
temperatures The start of 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.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.
Vehicle shutdown
Fuel cut-off system In the event of a collision of a certain
severity, the fuel system is cut-off and
the engine is switched off
automatically, for safety reasons.
Depending on version, a
corresponding warning message may
also appear in the Driver Information Centre 3 80.
Notice
In addition, the vehicle is
automatically unlocked and the
interior lights are illuminated.
Turn the ignition key to position
STOP to prevent battery discharge
and seek the assistance of a
workshop immediately. Have thevehicle checked for fuel leaks in the
engine compartment, beneath the
vehicle and near the fuel tank.
To reset the fuel cut-off system and
enable the vehicle to be driven:
1. Turn the ignition key to position MAR 3 103
2. Fully actuate the right turn signal light 3 91
3. Deactivate the right turn signal light
4. Fully actuate the left turn signal light
5. Deactivate the left turn signal light
6. Repeat steps 2, 3, 4 and 5.
7. Turn the ignition key to position STOP .9Danger
If you can smell fuel in the vehicle,
or a fuel leak is present, have thecause of this remedied
Page 108 of 183

106Driving and operating
During an Autostop, the heating,
power steering and brake
performance will be maintained.Caution
The steering assist can be
reduced during an Autostop.
Conditions for an Autostop
The stop-start system checks if each
of the following conditions is fulfilled.
Otherwise an Autostop will be
inhibited.
■ The stop-start system is not manually deactivated
■ the bonnet is fully closed
■ the driver's door is closed and the driver's seat belt is fastened
■ the battery is sufficiently charged and in good condition
■ the engine is warmed up
■ the engine coolant temperature is not too high
■ the engine exhaust temperature is not too high, e.g. after driving with
high engine load
■ the ambient temperature is not too low
■ the climate control system allows an Autostop
■ the self-cleaning function of the diesel particle filter is not active
■ the vehicle has moved since the last Autostop
■ the brake vacuum is sufficient
■ the windscreen wipers are not operating at fast speed
■ reverse gear is not selected
■ heated rear window is not operating
Ambient temperature near to the
freezing point can inhibit an Autostop.
For manual transmission automated
vehicles, an Autostop may be
inhibited until a speed of approx.
6 mph is reached.
Immediately after motorway driving
an Autostop may be inhibited.
New vehicle running-in 3 103.Battery discharge protection
To ensure reliable engine restarts,
several battery discharge protection
features are implemented as part of
the stop-start system.
Restarting the engine
Manual transmission
The selector lever must be in neutral
to enable an automatic restart.
Depress the clutch pedal to restart the
engine.
Manual transmission automated
If the lever is in position N, select
another gear, otherwise release the
brake pedal or move the lever to +, –
or R to enable an automatic restart.
If an electrical accessory, e.g. a
portable CD player, is connected to
the power outlet, a brief power drop
during the restart may be noticeable.
Restarting the engine with the
key When one of the following conditions
occurs during an Autostop, the
engine will need to be restarted
manually using the key.