Page 148 of 321

146Climate control
Setting of automatic rear window
heating based on cool outside
temperatures can be changed in the
vehicle personalisation menu in the
Colour-Info-Display.
Select the relevant setting in Settings,
I Vehicle in the Colour-Info-Display.
Colour-Info-Display 3 117.
Vehicle personalisation 3 121.
Notice
If the V button is pressed while the
engine is running, an Autostop will
be inhibited until the V button is
pressed again.
If the V button is pressed while the
engine is in an Autostop, the engine
will restart automatically.
Stop-start system 3 156.
Manual settings Climate control system settings can
be manually adapted by using the air
distribution buttons and the fan speed
controller as follows. Manual
changing of settings will deactivate
the automatic mode.Fan speed S
ZR
Touch ZS or R. The selected fan
speed is indicated in the Info-Display for a short time.
If the fan is switched off, the air
conditioning is also deactivated.
To return to automatic mode: Press AUTO button.
Air distribution l, M , K
Press appropriate button for desired
adjustment. Activation is indicated by the LED in the button.
l=to windscreen and front door
windows.M=to head area via adjustable air
vents.K=to foot well.
Combinations are possible.
Return to automatic air distribution:
press button AUTO.
Page 149 of 321

Climate control147
Cooling A/C
Press button A/C to switch on cooling.
Activation is indicated by the LED in
the button. Cooling is only functional
when the engine is running and
climate control fan is switched on.
Press button A/C again to switch off
cooling.
The air conditioning system cools and
dehumidifies (dries) cabin air as
required. Therefore condensation
may form and is drained under the
vehicle.
If no cooling or drying is required,
switch off the cooling system for fuel
saving reasons.
System ON/OFF X
Cooling, fan and automatic mode can
be switched off by pressing button X.
When the system is deactivated, the
LED in the button X is off.
Activation by pressing button X or
cooling button A/C or automatic mode
button AUTO. Activation is indicated
by the LED in the button.
Manual air recirculation 4Press button 4 to activate air
recirculation mode. Activation is
indicated by the LED in the button.
Select air recirculation to assist in cooling the interior or in blocking
outside odors or exhaust. When
recirculation is selected, a partial
ventilation to refresh the interior air
will occur every 10 minutes.
Press button 4 again to deactivate
recirculation mode.
In warm and very humid ambient air
conditions, the windscreen might mist up from outside, when cold air is
directed to it. If windscreen mists up
from outside, activate windscreen
wiper and deactivate l.
Automatic air recirculation An air humidity sensor switches
automatically to external air if internal air humidity is too high.
Basic settingsSome basic settings can be changed
in the vehicle personalisation menu in
the Colour-Info-Display.
Page 150 of 321
148Climate control
Select the relevant settings in
Settings , I Vehicle in the Colour-Info-
Display.
Colour-Info-Display 3 117.
Vehicle personalisation 3 121.
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 151 of 321
Climate control149
Rear air vents
Air vents for rear passenger are in the
centre console between the front
seats.
9 Warning
Do not attach any objects to the
slats of the air vents. Risk of
damage and injury in case of an
accident.
Fixed air vents
Additional air vents are located
beneath the windscreen and door windows and in the foot wells.Maintenance
Air intake
The air intake in front of the
windscreen in the engine
compartment must be kept clear to
allow air intake. Remove any leaves,
dirt or snow.
Pollen filterCabin air filtration
A particle filter cleans the cabin air
from dust, soot, pollen and spores.
Page 152 of 321
150Climate control
Active carbon filterIn addition to the particle filter, the
active carbon filter reduces odours.
Filter replacement must be carried out
during a regular service.
Air conditioning regular
operation In order to ensure continuously
efficient performance, it is
recommended that air coditioning
should be operated for a few minutes once a month, irrespective of the
weather and time of year.
Service For optimal cooling performance, it is
recommended to annually check the
climate control system, starting
three years after initial vehicle
registration, including:
■ Functionality and pressure test
■ Heating functionality
■ Leakage check
■ Check of drive belts■ Cleaning of condenser and evaporator drainage
■ Performance check
Page 159 of 321

Driving and operating157Caution
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 3 137.
Immediately after motorway driving
an Autostop may be inhibited.
New vehicle running-in 3 152.
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 - 3 105.
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:
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158Driving and operating
■ The stop-start system is manuallydeactivated
■ the bonnet is opened
■ the driver's seat belt is unfastened and the driver's door is opened
■ the engine temperature is too low
■ the charging level of the vehicle battery is below a defined level
■ the brake vacuum is not sufficient
■ the vehicle is driven at least at walking speed
■ the climate control system requests
an engine start
■ the air conditioning is manually switched on
If the bonnet is not fully closed, a
warning message is displayed in the
Driver Information Centre.
If an electrical accessory, e.g. a
portable CD player, is connected to
the power outlet, a brief power drop during the restart might be noticeable.Parking
■ Do not park the vehicle on an easily
ignitable surface. The high
temperature of the exhaust system
could ignite the surface.
■ Always apply parking brake. Pull electric parking brake switch
m for approx. one second.
Apply manual parking brake
without pressing release button.
Apply as firmly as possible on
downhill or uphill slopes. Depress the foot brake at the same time to
reduce operating force.
■ Switch off the engine and ignition. Turn the steering wheel until the
steering wheel lock engages.
■ If the vehicle is on a level surface or
uphill slope, engage first gear or set
the selector lever to P before
switching off the ignition. On an
uphill slope, turn the front wheels
away from the kerb.
If the vehicle is on a downhill slope, engage reverse gear or set theselector lever to P before switchingoff the ignition. Turn the front
wheels towards the kerb.
■ Lock the vehicle and activate the anti-theft alarm system.
Notice
In the event of an accident with
airbag deployment, the engine is
turned off automatically if the vehicle comes to a standstill within a certain
time.
Page 316 of 321

314IndexAAccessories and vehicle modifications .......................... 215
Active Emergency Braking .........187
Active head restraints ...................45
Adaptive cruise control .......109, 175
Adaptive forward lighting ...109, 128
Adjustable air vents ...................148
Airbag and belt tensioners .........104
Airbag deactivation ..............62, 104
Airbag label................................... 57 Airbag system .............................. 57
Air conditioning regular operation ................................ 150
Air conditioning system .............. 137
Air intake .................................... 149
Air vents...................................... 148
All-wheel drive ........................... 165
Antilock brake system ................ 165
Antilock brake system (ABS) .....106
Anti-theft alarm system ................33
Anti-theft locking system .............. 32
Appearance care ........................260
Armrest ................................... 52, 53
Armrest storage ........................... 71
Ashtrays ....................................... 92
Automatic anti-dazzle ..................38
Automatic climate control system .................................... 139Automatic dimming ......................37
Automatic light control ...............126
Automatic locking ........................26
Automatic transmission .............160
Automatic transmission fluid .......219
Autostop ..................................... 108
Auxiliary heater ........................... 148
B Battery discharge protection ......135
Battery voltage ........................... 121
Belts.............................................. 53
Bonnet ....................................... 217
Brake and clutch fluid .................265
Brake and clutch system ...........105
Brake assist ............................... 167
Brake fluid .................................. 221
Brakes ............................... 165, 221
Breakdown.................................. 257
Bulb replacement ....................... 225
C
Capacities .................................. 285
Cargo management system ........76
Car Pass ...................................... 20
Catalytic converter .....................160
Central locking system ................22
Centre console lighting ..............134
Changing tyre and wheel size ...246
Charging system ........................ 104