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152LightingExit lighting is switched off
immediately if the turn signal lever is
pulled while the driver's door is open.
Activation, deactivation and duration of this function can be changed in the Settings menu in the Info-Display.
Vehicle personalisation 3 130.
The settings can be saved for the key
being used 3 22.
Battery discharge protection Vehicle battery state of charge
function
The function guarantees longest
vehicle battery life via a generator
with controllable power output and
optimised power distribution.
To prevent discharge of the vehicle
battery when driving, the following
systems are reduced automatically in two stages and finally switched off:
● Auxiliary heater
● Heated rear window and mirrors
● Heated seats
● FanIn the second stage a message which
confirms the activation of the vehicle
battery discharge protection will be
displayed in the Driver Information Centre (DIC).
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 155 of 341

Climate control153Climate controlClimate control systems.............153
Heating and ventilation system 153
Air conditioning system ...........154
Electronic climate control system .................................... 156
Auxiliary heater ........................160
Air vents ..................................... 161
Adjustable air vents .................161
Fixed air vents ......................... 161
Maintenance .............................. 161
Air intake ................................. 161
Pollen filter ............................... 161
Air conditioning regular
operation ................................ 162
Service .................................... 162Climate control systems
Heating and ventilation system
Controls for: ● temperature
● air distribution
● fan speed
● demisting and defrosting
Heated rear window Ü 3 35.
Temperature
red:warmblue:coldHeating will not be fully effective until
the engine has reached normal
operating temperature.
Air distributions:to windscreen and front door
windowsM:to head area via adjustable air
ventsK:to foot well
All combinations are possible.
Fan speed
Adjust the air flow by switching the fan to the desired speed.
Page 156 of 341
154Climate controlDemisting and defrosting
●Press V: fan automatically
switches to higher speed, the air
distribution is directed towards
the windscreen.
● Set temperature control to warmest level.
● Switch on heated rear window Ü.
● Open side air vents as required and direct them towards the doorwindows.
Air conditioning system
In addition to the heating and
ventilation system, the air
conditioning system has controls for:
n:cooling4:air recirculation
Heated seats ß 3 45, Heated
steering wheel * 3 99.
Cooling n
Press n to switch on cooling.
Activation is indicated by illumination
of the LED in the button. Cooling is
only functional when the engine is
running and climate control fan is switched on.
Press n again to switch off cooling.
The air conditioning system cools and
dehumidifies (dries) as soon as the
outside temperature is slightly above
the freezing point. Therefore
condensation may form and drip from under the vehicle.
Page 157 of 341

Climate control155If no cooling or drying is required,
switch off the cooling system for fuel
saving reasons. Activated cooling
may inhibit Autostops.
Air recirculation system 4
Press 4
to activate air recirculation
mode. Activation is indicated by the
LED in the button.
Press 4 again to deactivate air
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 to it. If windscreen mists up
from outside, activate windscreen
wiper and deactivate s.
Maximum cooling
Briefly open the windows so that hot
air can disperse quickly.
● Switch on cooling n.
● Air circulation system 4 on.
● Press air distribution switch M.
● Set temperature control to coldest level.
● Set fan speed to highest level.
● Open all vents.
Page 158 of 341

156Climate controlDemisting and defrosting the
windows V
●
Press V: fan automatically
switches to higher speed, the air
distribution is directed towards
the windscreen.
● Set temperature control to warmest level.
● Switch on heated rear window Ü.
● Open side air vents as required and direct them towards the doorwindows.
Notice
If V is pressed while the engine is
running, an Autostop will be inhibited
until V is pressed again.
If s is pressed with the fan switched
on and the engine running, an
Autostop will be inhibited until s is
pressed again or until the fan is
switched off.
If V is pressed while the engine is
in an Autostop, the engine will restart automatically.
If s is pressed with the fan switched
on while the engine is in an
Autostop, the engine will restart
automatically.
Stop-start system 3 166.
Electronic climate control system
The dual zone climate control allows
different climatisation temperatures
for driver side and front passenger
side.
In automatic mode, temperature, fan
speed and air distribution are
regulated automatically.
Controls for:
● temperature on driver side
● air distribution
● fan speed
● temperature on front passenger side
n:coolingAUTO:automatic mode4:manual air recirculationV:demisting and defrosting
Heated rear window Ü 3 35, Heated
seats ß 3 45, Heated steering wheel
* 3 99.
Page 160 of 341

158Climate control
If the minimum temperature Lo is set,
the climate control system runs at
maximum cooling, if cooling n is
switched on.
If the maximum temperature Hi is set,
the climate control system runs at
maximum heating.
Notice
If n is switched on, reducing the set
cabin temperature can cause the
engine to restart from an Autostop or inhibit an Autostop.
Demisting and defrosting the
windows V
●
Press V. Activation is indicated
by illumination of the LED in the
button.
● Temperature and air distribution are set automatically and the fan
runs at high speed.
● Switch on heated rear window Ü.
● To return to previous mode: press V. To return to automatic
mode: press AUTO.
Setting of automatic rear window
heating can be changed in the
Settings menu in the Info-Display.
Vehicle personalisation 3 130.
Notice
If V is pressed while the engine is
running, an Autostop will be inhibited
until V is pressed again.
If s is pressed with the fan switched
on and the engine running, an
Autostop will be inhibited until s is
pressed again or until the fan is
switched off.
If V is pressed while the engine is
in an Autostop, the engine will restart automatically.
If s is pressed with the fan switched
on while the engine is in an
Autostop, the engine will restart
automatically.
Stop-start system 3 166.
Manual settings Climate control system settings can
be changed by activating the buttons
and rotary knobs as follows.
Changing a setting will deactivate the automatic mode.
Page 161 of 341

Climate control159Fan speed Z
Press lower button to decrease or
upper button to increase fan speed as shown in the illustration. The fan
speed is indicated by the number of
segments in the display.
Pressing the lower button for longer:
fan and cooling are switched off.
Pressing the upper button for longer:
the fan runs at maximum speed.
To return to automatic mode: Press
AUTO .
Air distribution s, M , K
Press appropriate button for desired
adjustment. Activation is indicated by
illumination of the LED in the button.
s:to windscreen and front door
windows (air conditioning is
activated in the background to
help preventing windows from
fogging)M:to head area via adjustable air ventsK:to foot well
All combinations are possible.
Return to automatic air distribution:
press AUTO .
Cooling n
Press n to switch on cooling.
Activation is indicated by illumination
of the LED in the button. Cooling is
only functional when the engine is
running and climate control fan is switched on.
Press n again to switch off cooling.
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. When the cooling
Page 162 of 341

160Climate controlsystem is switched off, no enginerestart will be requested by the
climate control system during an
Autostop. Exception: defrost system
is activated and outside temperature
above 0 °C.
The display will indicate ACON when
cooling is activated or ACOFF when
the cooling is deactivated.
Activation or deactivation of cooling
operation after engine start can be
changed in the Settings menu in the
Info-Display. Vehicle personalisation
3 130.
Air recirculation mode 4Press 4 to activate the air
recirculation mode. Activation is
indicated by illumination of the LED in
the button.
Press 4 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 s.
Basic settings
Some settings can be changed in the Settings menu in the Info-Display.
Vehicle personalisation 3 130.
Auxiliary heater
Air heater Quickheat is an electric auxiliary air
heater which automatically warms up
the passenger compartment more
quickly.