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Climate control153● Cooling must be activated in theclimate setting menu for optimalcooling and demisting. Press
Climate to enter the menu and
follow the touch button to switch on air conditioning A/C.
● Set the preselected temperatures separately for
driver and front passenger using
the left and right control dials.
Recommended temperature is
22 °C. Temperature is indicated briefly in displays beside the
control dials and in the climate
setting menu.
● Air recirculation mode n should
be deactivated. When
deactivated the LED in the button is not illuminated.
Manual settings Climate control system settings can
be changed by activating the
following functions as described
below.Fan speed ( )
Press upper button ( to increase or
lower button ) to decrease fan speed.
The fan speed is indicated as pop-up in the Info Display. Fan speed can
also be changed by touch buttons in
the climate setting display. Press
Climate to enter the menu.
Pressing the lower button ) for longer:
fan and cooling are switched off.
To return to automatic mode press
AUTO .
Air distribution w, x , y
Press Climate to enter the menu.
Touch:
w:to windscreen and front door
windowsx:to head area and rear seats via
adjustable air ventsy:to front and rear foot well and
windscreen
To return to automatic air distribution
press AUTO .
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154Climate controlTemperature preselection
Set the preselected temperatures
separately for driver and front
passenger to the desired value using
the left and right control dials. The
knob on the passenger side changes
the temperature for the passenger
side. The knob on the driver's side
changes the temperature for the
driver's side or for both sides
depending on activation of
synchronisation SYNC.
Recommended temperature is 22 °C .
Temperature is indicated in displays
beside the control dials and as pop-
up in the Info-Display.
If the minimum temperature Lo is set,
the climate control system runs at maximum cooling, if cooling A/C is
switched on.
If the maximum temperature Hi is set,
the climate control system runs at maximum heating.
Notice
If A/C is switched on, reducing the
set cabin temperature can cause the engine to restart from an Autostop or
inhibit an Autostop.
Stop-start system 3 165.
Dual zone temperature
synchronisation SYNC
Press Climate to enter the menu.
Touch SYNC to link passenger side
temperature setting to the driver side.
When passenger side control dial will be adjusted, synchronisation is
deactivated.Air conditioning A/C
Press Climate to enter the menu and
follow the touch button to switch air
conditioning A/C ON or A/C OFF.
Cooling is only functional when the
engine is running and climate control
fan is switched on.
The air conditioning system cools and
dehumidifies (dries) when outside
temperature is above a specific level. Therefore condensation may form
and drip from under the vehicle.
If no cooling or drying is required,
switch off the cooling system for fuel
saving reasons.
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Climate control155Manual air recirculation n
Press n to activate the air
recirculation mode. The LED in the
button illuminates to indicate
activation.
Press n again to deactivate
recirculation mode.
9 Warning
The exchange of fresh air is
reduced in air recirculation mode.
In operation without cooling the air humidity increases, so the
windows may mist up from inside.
The quality of the passenger
compartment air deteriorates,
which may cause the vehicle
occupants to feel drowsy.
In warm and very humid ambient air conditions, the windscreen may mist
up from outside, when cold air is
directed towards it. If windscreen
mists up from outside, activate
windscreen wiper and deactivate w.
Automatic air recirculation
An air humidity sensor switches
automatically to external air if internal air humidity is too high.
Demisting and defrosting the
windows à
● Press à. The LED in the button
illuminates to indicate activation.
● Temperature and air distribution are set automatically and the fan
runs at high speed.
● Switch on air conditioning A/C ON in Climate setting menu
by pressing Climate, if required.
● Switch on heated rear window b.
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Climate control159Air conditioning regular
operation
In order to ensure continuously
efficient performance, cooling must
be operated for a few minutes once a month, irrespective of the weather
and time of year. Operation with
cooling is not possible when the
outside temperature is too low.
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
● cabin air filter check
Page 169 of 323

Driving and operating167● The driver's seat belt isunfastened 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.Parking9 Warning
● Do not park the vehicle on an
easily ignitable surface. The
high temperature of the
exhaust system could ignite the
surface.
● Always apply the parking brake. Pull switch m for
approx. one second and check
if the control indicator m
illuminates.
The electric parking brake is applied when control indicator
m illuminates 3 107.
● Switch off the engine. ● If the vehicle is on a level surface or uphill slope, engage
first gear or set the selector
lever to position P before
switching off 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 the selector lever to position P before switching off ignition.
Turn the front wheels towards
the kerb.
● Close the windows and the sunroof.
● Switch off ignition with power button. Turn the steering wheel
until the steering wheel lock is
felt to engage.
● Lock the vehicle with button on the door handle.
Activate the anti-theft alarm
system 3 32.
● The engine cooling fans may run
after the engine has been
switched off 3 239.
Caution
After running at high engine
speeds or with high engine loads,
operate the engine briefly at a low
load or run in neutral for
approx. 30 seconds before
switching off, in order to protect
the turbocharger.
Page 318 of 323

316IndexAAccessories and vehicle modifications .......................... 237
Active bonnet ................................ 69
Active emergency braking ..........201
Adaptive cruise control .......111, 189
AdBlue ................................ 109, 170
Adjustable air vents ...................157
Airbag and belt tensioners .........106
Airbag deactivation ..............61, 106
Airbag label................................... 56
Airbag system .............................. 56
Air conditioning regular operation ................................ 159
Air conditioning system .............. 148
Air intake .................................... 158
Air vents...................................... 157
All-wheel drive ........................... 178
Antilock brake system ................ 178
Antilock brake system (ABS) .....108
Anti-theft alarm system ................32
Anti-theft locking system .............. 32
Appearance care ........................279
Armrest ................................... 51, 53
Armrest storage ........................... 72
Ashtrays ....................................... 95 Automatic anti-dazzle ..................38
Automatic dimming ......................37
Automatic light control ...............135
Automatic locking ........................25Automatic transmission .............173
Autostop ..................................... 165
Auxiliary heater ........................... 157
B Baselevel display ........................112
Battery discharge protection ......146
Battery voltage ........................... 124
Belts.............................................. 54 BlueInjection ............................... 170
Bonnet ....................................... 239
Brake and clutch fluid .................283
Brake and clutch system ...........107
Brake assist ............................... 180
Brake fluid .................................. 242
Brakes ............................... 178, 242
Breakdown.................................. 277
Bulb replacement ....................... 245
C Capacities .................................. 299
Cargo management system ........79
Catalytic converter .....................169
Central locking system ................21
Centre console lighting ..............145
Centre console storage ...............72
Changing tyre and wheel size ...266
Charging system ........................ 107
Child locks ................................... 26
Child restraint installation locations ................................... 65