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132LightingHeadlight flash
To activate the headlight flash, pull
lever.
Pulling lever deactivates high beam.
LED headlights 3 133.
Headlight range adjustment Manual headlight range
adjustment
Headlight range can be adjusted
manually if vehicle is equipped with
halogen headlights. LED headlights
are adjusted automatically.
Dynamic automatic headlight
levelling 3 133.
To adapt headlight range to the
vehicle load to prevent dazzling: push
and then turn ? to required position.
0:front seats occupied1:all seats occupied2:all seats occupied and load
compartment laden3:driver's seat occupied and load
compartment ladenHeadlights when driving
abroad
The asymmetrical headlight beam
extends visibility at the edge of the
road at the passenger side.
However, when driving in countries
where traffic drives on the opposite
side of the road, adjust the headlights to prevent dazzling of oncoming
traffic.
Vehicles with halogen headlight
system
The headlights do not have to be
adjusted.
Vehicles with LED headlightHeadlights can be set for driving on
the opposite side of the road in the
vehicle personalisation menu via the
Info Display.
Select the relevant setting in Settings
I Vehicle .
Info Display 3 117.
Vehicle personalisation 3 123.
Page 142 of 315

140Climate controlClimate controlClimate control systems.............140
Air conditioning system ...........140
Electronic climate control system .................................... 143
Auxiliary heater ........................149
Air vents ..................................... 149
Adjustable air vents .................149
Fixed air vents ......................... 150
Maintenance .............................. 150
Air intake ................................. 150
Air conditioning regular operation ................................ 150
Service .................................... 150Climate control systems
Air conditioning system
Illustration shows functions which
may not be available for your
particular vehicle.
Controls for: ● Fan speed E
● Temperature TEMP
● Air distribution ",x and y
● Air conditioning A/C
● Demisting and defrosting á
● Air recirculation n
● External air (
● Heated rear window and exterior
mirrors b
● Heated windscreen ,
● Heated seats ß
Some changes of settings are
indicated briefly in the Info Display.
Activated functions are indicated by
the LED in the respective button.
Fan speed E
Adjust the air flow by turning E to the
desired speed.clockwise:increaseanti-clockwise:decrease
Temperature TEMP
Adjust the temperature by turning
TEMP to the desired temperature.
red area:warmerblue area:colder
Heating will not be fully effective until
the engine has reached normal
operating temperature.
Page 143 of 315

Climate control141Air distribution ",x and y
Press:":to windscreen and front door
windowsx:to head area and rear seats via
adjustable air ventsy:to front and rear foot well and
windscreen
Combinations are possible.
Air conditioning A/C
Press 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 A/C 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.
If no cooling or drying is required,
switch off the cooling system for fuel
saving reasons.
Activated cooling may inhibit
Autostops.
Stop-start system 3 157.
Demisting and defrosting the
windows á● Press á: fan automatically
switches to higher speed, the air
distribution is directed towards
the windscreen.
● Set temperature controller TEMP to warmest level.
● Switch on air conditioning A/C if
required.
● Switch on heated rear window b.
● Switch on heated windscreen , if available.
● Open side air vents as required and direct them towards the doorwindows.
● For maximum demisting and defrosting set fan speed to
highest level.
Note
If á is pressed while the engine is
running, an Autostop will be inhibited until á is pressed again.
If á is pressed while the engine is in
an Autostop, the engine will restart
automatically.
Stop-start system 3 157.
Page 145 of 315
Climate control143Maximum cooling
Briefly open the windows so that hot
air can disperse quickly.
● Switch on air conditioning A/C.
● Press n for air recirculation
system on.
● Press x for air distribution.
● Set temperature control TEMP to
coldest level.
● Set fan speed E to highest level.
● Open all vents.
Version with heated
windscreen ,
If the vehicle is equipped with heated
windscreen, button ( is replaced
by button ,.
Heated rear window and exterior
mirrors b 3 43.
Heated windscreen , 3 44.
Heated seats q 3 55.
Electronic climate control
system
The dual zone climate control allows
different temperatures for driver side
and front passenger side.
In automatic mode, temperature, fan
speed and air distribution are
regulated automatically.
Illustration shows functions which
may not be available for your
particular vehicle.
Page 146 of 315

144Climate controlControls for:● rotary knob for temperature on driver side
● rotary knob for temperature on passenger side
● CLIMATE enters the Climate
setting menu in the Info-Display
● Fan speed increase ( and
decrease )
● Climate control ON/OFF or â
● Automatic mode AUTO
● Manual air recirculation n
● Demisting and defrosting à
● Heated rear window and exterior mirrors b
● Heated windscreen ,
● Heated seats q
● Ventilated seats r
Activated functions are indicated by
the LED in the respective control.
The electronic climate control system
is only fully operational when the
engine is running.Climate setting menu CLIMATE
Settings for
● Air distribution w, x , y
● Fan speed E
● Temperature for driver and passenger side 23°/25°
● Dual zone temperature synchronisation SYNC
● Air conditioning A/C
can be triggered manually in the Climate setting menu. Press
CLIMATE to enter the menu and
follow the touch buttons.
Climate setting menu can also be
displayed by touching button g in the
Info Display 3 117.
Changes of settings via the controls
are indicated as pop up in the
Info Display.
Automatic mode AUTO
Basic settings for automatic control
with maximum comfort:
● Press AUTO, the air distribution
and fan speed are regulated
automatically.
● Open all air vents to allow optimised air distribution in
automatic mode.
Page 147 of 315

Climate control145● 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 rotary knob.
Recommended temperature is
22 °C. Temperature is indicated
briefly in displays beside the
rotary knobs 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 buttons
and rotary knobs as described below.
Changing a setting will deactivate the
automatic mode.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 .
Page 151 of 315
Climate control149Basic settingsFollowing settings can be changed in
the Personalisation menu in the
Info Display:
● fan speed regulation in automatic
mode
● settings of automatic rear window
heating
● settings of automatic windscreen
dehumidification
● settings of automatic seat heating
Vehicle personalisation 3 123.
Heated rear window and exterior
mirrors b 3 43.
Heated windscreen , 3 44.
Heated seats q 3 55.
Ventilated seats r 3 55.
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 At least one air vent must be open
while cooling is on.
Illustration shows centre air vents in
instrument panel.
Illustration shows outer air vents in
instrument panel.
Illustration shows air vents for rear
passenger.
Page 238 of 315

236Vehicle careReplacing the vehicle batteryNote
Any deviation from the instructions
given in this section may lead to
temporary deactivation or
disturbance of the stop-start system.
When the vehicle battery is being
replaced, please ensure that there
are no open ventilation holes in the
vicinity of the positive terminal. If a
ventilation hole is open in this area, it
must be closed off with a dummy cap, and the ventilation in the vicinity of the negative terminal must be opened.
Ensure that the battery is always
replaced by the same type of battery.
We recommend that you have the
vehicle battery replaced by a
workshop.
Stop-start system 3 157.Charging the vehicle battery9 Warning
On vehicles with stop-start
system, ensure that the charging potential does not exceed 14.6 V
when using a battery charger.
Otherwise the vehicle battery may be damaged.
Jump starting 3 269.
Discharge protection Battery voltage
When the vehicle battery voltage is
running low, a warning message will
appear in the Driver Information
Centre.
1. Switch off any electrical consumers which are not requiredfor a safe ride, e.g. seat heating,
heated rear window or other main consumers.
2. Charge the vehicle battery by driving continuously for a while or
by using a charging device.
The warning message will disappear
after the engine has been started
twice without a voltage drop.
If the vehicle battery cannot be
recharged, have the cause of the fault
remedied by a workshop.
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 and front window
● heated steering wheel
● heated 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.