Page 135 of 321
Lighting133
■ Auxiliary heater
■ Heated rear window and mirrors
■ Heated seats
■ Fan
In the second stage a message which confirms the activation of the vehicle
battery discharge protection will be
displayed in the Driver Information
Centre.
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 147 of 321
Climate control145
Select the relevant settings in
Settings , I Vehicle in the Colour-Info-
Display.
Colour-Info-Display 3 114.
Vehicle personalisation 3 118.
Auxiliary heater
Air heater Quickheat is an electric auxiliary air
heater which automatically warms up
the passenger compartment more
quickly.Air vents
Adjustable air vents Front air vents
To open the vent, turn the adjuster
wheel to B. Adjust the air amount at the
vent outlet by turning the adjuster
wheel.
Direct the flow of air by tilting and swivelling the slats.
To close the vent, turn the adjuster
wheel to 7.
Page 154 of 321

152Driving and operating
Automatic transmission: operate
brake pedal and move selector lever
to P or N.
Do not operate accelerator pedal.
Press and release Engine Start/Stop
button: an automatic procedure
operates the starter with a short delay
until the engine is running, see
Automatic Starter Control.
Before restarting or to switch off the
engine, press Engine Start/Stop
button once more.
During an Autostop, the engine can
be started by depressing the clutch
pedal 3 153.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 vehicle 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
or to hold Engine Start/Stop button
pressed. Once applied, the system
will go on starting automatically until
the engine is running. Because of the checking procedure, the engine startsrunning after a short delay.Possible reasons for a non-startingengine:
■ 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.
Page 156 of 321

154Driving and operatingCaution
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.
■ The stop-start system is not manually deactivated
■ the bonnet is fully closed
■ the driver's door is closed or the driver's seat belt is fastened
■ the vehicle 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 above -5° C
■ the climate control system allows an Autostop
■ the brake vacuum is sufficient
■ the self-cleaning function of the diesel particle filter is not active
■ the vehicle was driven at least at walking speed since the last
Autostop
Otherwise an Autostop will be
inhibited.
Certain settings of the climate control
system may inhibit an Autostop. See
Climate control chapter for more
details 3 134.
Immediately after motorway driving
an Autostop may be inhibited.
New vehicle running-in 3 149.
Vehicle battery discharge protection
To ensure reliable engine restarts, several battery discharge protection
features are implemented as part of
the stop-start system.
Power saving measures
During an Autostop, several electrical
features such as auxiliary electric
heater or rear window heating are
disabled or switched to a powersaving mode. The fan speed of the
climate control system is reduced to
save power.
Restart of the engine by the
driver Depress the clutch pedal to restart the
engine.
The engine start is indicated by the
needle at the idle speed position in
the tachometer.
If the selector lever is shifted out of
neutral before depressing the clutch
first, control indicator - illuminates
or is shown as a symbol in the Driver
Information Centre.
Control indicator - 3 102.
Restart of the engine by the
stop-start system
The selector lever must be in neutral
to enable an automatic restart.
If one of the following conditions
occurs during an Autostop, the
engine will be restarted automatically
by the stop-start system:
Page 207 of 321

Driving and operating205
Turn the thumb wheel clockwise.
If no further gas odour is perceptible
when the manual shut-off valve is
closed, the vehicle can be used in
petrol mode. If the gas odour persists, do not start the engine. Have the
cause of the fault remedied by a workshop.
When using underground car parks,
follow the instructions of the operator
and local laws.
Note
In the event of an accident, switch off
the ignition and lights. Close the
manual shut-off valve on multivalve.
Refuelling9 Danger
Before refuelling, switch off engine
and any external heaters with
combustion chambers. Switch off
any mobile phones.
Follow the operating and safety
instructions of the filling station
when refuelling.
9 Danger
Fuel is flammable and explosive.
No smoking. No naked flames or
sparks.
If you can smell fuel in your
vehicle, have the cause of this
remedied immediately by a
workshop.
Caution
In case of misfuelling, do not
switch on ignition.
Fuel filler flap is located at right rear
side of vehicle.
Page 316 of 321

314IndexAAccessories and vehicle modifications .......................... 213
Active Emergency Braking .........185
Active head restraints ...................46
Adaptive cruise control .......106, 173
Adaptive forward lighting ...106, 125
Adjustable air vents ...................145
Airbag and belt tensioners .........101
Airbag deactivation ..............60, 101
Airbag system .............................. 58
Air conditioning regular operation ................................ 147
Air conditioning system .............. 134
Air intake .................................... 146
Air vents...................................... 145
All-wheel drive ........................... 163
Antilock brake system ................ 163
Antilock brake system (ABS) .....103
Anti-theft alarm system ................34
Anti-theft locking system .............. 33
Appearance care ........................257
Apply footbrake .......................... 105
Armrest ................................... 53, 54
Armrest storage ........................... 68
Ashtrays ....................................... 90 Automatic anti-dazzle ..................39
Automatic climate control system .................................... 136Automatic dimming ......................38
Automatic light control ...............123
Automatic locking ........................27
Automatic transmission .............157
Autostop ..................................... 105
Auxiliary heater ........................... 145
B Battery discharge protection ......132
Battery voltage ........................... 118
Belts.............................................. 54
Bonnet ....................................... 215
Brake and clutch fluid .................262
Brake and clutch system ...........102
Brake assist ............................... 165
Brake fluid .................................. 218
Brakes ............................... 163, 218
Breakdown.................................. 254
Bulb replacement ....................... 222
C Capacities .................................. 288
Cargo management system ........73
Car Pass ...................................... 20
Catalytic converter .....................157
Central locking system ................23
Centre console lighting ..............131
Changing tyre and wheel size ...243
Charging system ........................ 101
Child locks ................................... 28