Page 139 of 331
Lighting137
■ 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 140 of 331
138Climate controlClimate controlClimate control systems ............. 138
Air vents ..................................... 149
Maintenance .............................. 150Climate control systems
Air conditioning system
Controller and buttons for the
following functions:
■ temperature TEMP
■ air distribution l M K
■ fan speed Z
■ cooling A/C
■ air recirculation 4
■ demisting and defrosting V
Heated rear window Ü 3 41.
Heated seats ß 3 53.
Ventilated seats
A 3 53.
Heated steering wheel * 3 87.
Temperature TEMP
Turn controller:
red=warmblue=cold
Heating will not be fully effective until
the engine has reached normal
operating temperature.
Page 143 of 331

Climate control141
Controller and buttons for the
following functions:
■ temperature TEMP
■ air distribution l M K
■ fan speed Z
■ automatic mode AUTO
■ cooling A/C
■ air recirculation 4
■ demisting and defrosting V
■ system ON/OFF X
Heated rear window Ü 3 41.
Heated front seats ß 3 53.
Ventilated front seats A 3 53.
Heated steering wheel * 3 87.
Indication
Settings of temperature and fan
speed are indicated in the climate
display.
Each change of settings is shown in
the Info-Display for a few seconds.
The electronic climate control system
is only fully operational when the
engine is running.
Climate control system settings are
saved in the key used to lock the vehicle.
Automatic mode AUTO
Basic setting for maximum comfort:
■ Press AUTO, the air distribution
and fan speed are regulated
automatically. Activation is
indicated by the LED in the button.
■ Press A/C to switch on optimal
cooling and demisting. Activation is indicated by the LED in the button.
■ Set temperature by turning controller TEMP. Suggested
comfort setting is 22 °C.
■ Open all air vents to allow optimised air distribution in
automatic mode.
Page 147 of 331

Climate control145
■automatic mode AUTO
■ cooling A/C
■ air recirculation 4
■ demisting and defrosting V
■ system ON/OFF X
■ dual zone temperature
synchronisation SYNC
Heated rear window Ü 3 41.
Heated front seats ß 3 53.
Ventilated front seats A 3 53.
Heated steering wheel * 3 87.
IndicationTemperature settings are indicated
for driver and passenger side
separately on the panels.
Each change of settings is shown in
the Info-Display for a few seconds.
The dual automatic climate control
system is only fully operational when
the engine is running.
Climate control system settings are
saved in the key used to lock the vehicle.
Automatic mode AUTOBasic setting for maximum comfort: ■ Press AUTO, the air distribution
and fan speed are regulated
automatically. Activation is
indicated by the LED in the button.
■ Press A/C to switch on optimal
cooling and demisting. Activation is indicated by the LED in the button.
■ Set temperature by touching R or
S on the driver side. Suggested
comfort setting is 22 °C.
Temperature can be set differently
for driver and passenger. Touch R
or S on the passenger side to allow
different temperature zones.
■ Open all air vents to allow optimised air distribution in
automatic mode.
Setting of fan speed regulation in
automatic mode 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 3 118.
Vehicle personalisation 3 122.
Page 152 of 331
150Climate control
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 246 of 331
244Vehicle care
No.Circuit1Transmission control module2Engine control module3–4–5Ignition/Transmission control
module/Engine control module6Windscreen wiper7–8Fuel injection/Ignition system9Fuel injection/Ignition system10Engine control module11Lambda probe12Starter13Sensor throttle heating14Lighting15Rear window wiperNo.Circuit16Vacuum pump/Mass air flow
meter/Water in fuel sensor/DC
transformer17–18Adaptive forward lighting19Adaptive forward lighting20Fuel pump21Rear power windows22ABS23Variable effort steering24Front power windows25Power outlets26ABS27Electric parking brake28Heated rear window29Left power seat30Right power seatNo.Circuit31Air conditioning system32Body control module33Heated front seats34Sunroof35Infotainment system36–37Right high beam38Left high beam39–40–41Vacuum pump42Radiator fan43Vehicle battery/DC transformer
(only on vehicles with stop-start
system)44Headlamp washer system45Radiator fan
Page 247 of 331
Vehicle care245
No.Circuit46Terminal 87/Main relay47Lambda probe48Fog lights49Right low beam50Left low beam51Horn52Ignition53Ignition/Ventilated front seats54Ignition55Power windows/Mirror folding56Windscreen washer57–58–59Diesel fuel heating/Emission
control system60Mirror heating61Mirror heatingNo.Circuit62–63Rear window sensor64Adaptive forward lighting65Auxiliary pump (only on vehicles
with stop-start system)66Rear window washer system67Fuel system control module68–69Vehicle battery sensor70Rain sensor71Vehicle battery sensor
After changing of defective fuses,
close the fuse box cover and press
until it engages.
If the fuse box cover is not closed
correctly, malfunctions may occur.
Instrument panel fuse box
In left-hand drive vehicles, the fuse
box is behind the storage
compartment in the instrument panel.
Open compartment, compress the
locking tabs, fold compartment down and remove.
Page 248 of 331
246Vehicle care
In right-hand drive vehicles, the fuse
box is located behind a cover in the
glovebox. Open the glovebox and
remove the cover.
No.Circuit1Infotainment system/Info
display2Body control unit3Body control unit4Infotainment system/Info
display5Infotainment system/Info
display6Cigarette lighter7Power outlet8Body control unit9Body control unit10Body control unit11Interior fan12–13–14Diagnostic connector15AirbagNo.Circuit16Central locking system/Tailgate17Air conditioning system18Transportation fuse19Memory20–21Instrument22Ignition23Body control unit24Body control unit25–26Power outlet load compartment
Power seats, No's. 12 and 13, have
an overload protection. The circuit will
be closed again after cooling down.