Page 177 of 317

Climate control175Demisting 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 door
windows.
Note
If V is pressed while the engine is
running, an Autostop will be inhibited
until V is pressed again.
If l is pressed with the fan switched
on and the engine running, an
Autostop will be inhibited until l 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 l is pressed with the fan switched
on while the engine is in an
Autostop, the engine will restart
automatically.
Stop-start system 3 185.
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 33, Heated
seats ß 3 42, Heated steering wheel
* 3 83.
Page 178 of 317

176Climate control
Climate control settings are shown onthe Info-Display. Setting
modifications are briefly popped-up,
superimposed over the currently
displayed menu.
The electronic climate control system
is only fully operational when the
engine is running.
Automatic mode AUTO
Basic setting for maximum comfort:
● Press AUTO. The LED in the
button illuminates to indicate
activation. The air distribution
and fan speed are regulated
automatically.
● Open all air vents to allow optimised air distribution in
automatic mode.
● Press n to switch on optimal
cooling and demisting. The LED in the button illuminates to
indicate activation.
● Set the preselected temperatures for driver and front
passenger using the left and right
rotary knobs. Recommended
temperature is 22 °C.
The fan speed regulation in automatic mode can be changed in the
Settings menu in the Info-Display.
Vehicle personalisation 3 108.
All air vents are actuated
automatically in automatic mode. The air vents should therefore always be
open.
Temperature preselection
Temperatures can be set to a desired value between 16 °C and 28 °C.
Page 179 of 317

Climate control177
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.
Note
If n is switched on, reducing the set
cabin temperature can cause the
engine to restart from an Autostop or inhibit an Autostop.
Stop-start system 3 185.
Demisting and defrosting the
windows V
● Press V. 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 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 3 108.
Note
If V is pressed while the engine is
running, an Autostop will be inhibited
until V is pressed again.
If l is pressed with the fan switched
on and the engine running, an
Autostop will be inhibited until l 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 l is pressed with the fan switched
on while the engine is in an
Autostop, the engine will restart
automatically.
Stop-start system 3 185.
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.
Fan speed Z
Page 180 of 317

178Climate controlPress the lower button to decrease or
upper button to increase fan speed.
The fan speed is indicated by the
number of segments in the display.
Pressing and holding the lower
button: fan and cooling are switched
off.
Pressing and holding the upper
button: the fan runs at maximum
speed.
To return to automatic mode: Press
AUTO .
Air distribution l,
M ,
K
Press appropriate button for desired
adjustment. The LED in the button
illuminates to indicate activation.l: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 and windscreen
All combinations are possible.
Return to automatic air distribution:
press AUTO .
Cooling n
Press n 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 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
system is switched off, no engine
restart will be requested by the
climate control system during an
Autostop. Exception: defrost system
is activated and outside temperature
above 0 °C. Stop-start system
3 185.
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
3 108.
Air recirculation mode 4
Press 4 to activate air recirculation
mode. The LED in the button
illuminates to indicate activation.
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
Page 181 of 317
Climate control179directed towards it. If windscreen
mists up from outside, activate
windscreen wiper and deactivate l.
Basic settings
Some settings can be changed in the
Settings menu in the Info-Display.
Vehicle personalisation 3 108.
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 the cooling is on.
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 182 of 317

180Climate control
Air vents for rear passenger are left
and right side behind 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.
Air 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
Note
Refrigerant R-134a contains
fluorinated greenhouse gases.
Page 183 of 317

Driving and operating181Driving and
operatingDriving hints ............................... 182
Control of the vehicle ...............182
Steering ................................... 182
Starting and operating ...............182
New vehicle running-in ............182
Ignition switch positions ...........182
Retained power off ..................183
Starting the engine ..................183
Overrun cut-off ........................ 184
Stop-start system ....................185
Parking .................................... 187
Engine exhaust .......................... 188
Exhaust filter ............................ 188
Catalytic converter ...................189
AdBlue ..................................... 190
Automatic transmission ..............192
Transmission display ...............192
Selector lever .......................... 193
Manual mode ........................... 194
Electronic driving programmes 194
Fault ........................................ 194
Interruption of power supply ....195
Manual transmission ..................196Brakes........................................ 196
Antilock brake system .............196
Parking brake .......................... 197
Brake assist ............................. 199
Hill start assist ......................... 199
Ride control systems .................199
Traction Control system ..........199
Electronic Stability Control ......200
Interactive driving system ........201
Driver assistance systems .........203
Cruise control .......................... 203
Speed limiter ........................... 204
Adaptive cruise control ............206
Forward collision alert .............212
Following distance indication ...215
Active Emergency Braking ......216
Parking assist .......................... 218
Side blind spot alert .................221
Rear view camera ...................222
Traffic sign assistant ................224
Lane departure warning ..........227
Fuel ............................................ 229
Fuel for petrol engines .............229
Fuel for diesel engines ............230
Refuelling ................................ 231
Trailer hitch ................................ 233
General information .................233
Driving characteristics and towing tips .............................. 233Trailer towing........................... 234
Towing equipment ...................234
Trailer stability assist ...............237
Page 184 of 317

182Driving and operatingDriving hints
Control of the vehicle
Never coast with engine not
running
Many systems will not function in this situation ( e.g. brake servo unit, power
steering). Driving in this manner is a
danger to yourself and others. All
systems function during an Autostop.
Stop-start system 3 185.
Idle boost
If charging of the vehicle battery is
required due to battery condition, the
power output of the generator must be increased. This will be achieved by an idle boost which may be audible.
A message appears in the Driver
Information Centre.
Pedals
To ensure the pedal travel is
uninhibited, there must be no mats in
the area of the pedals.Use only floor mats which fit properly
and are fixed by the retainers on the
driver's side.
Steering
If power steering assist is lost
because the engine stops or due to a system malfunction, the vehicle can
be steered but may require increased
effort.
Control indicator c 3 98.Starting and operating
New vehicle running-in
Do not brake unnecessarily hard for
the first few journeys.
During the first drive, smoke may
occur because of wax and oil
evaporating off the exhaust system. Park the vehicle in the open for a
while after the first drive and avoid
inhaling the fumes.
During the running-in period, fuel and engine oil consumption may be
higher and the cleaning process of
the exhaust filter may take place more
often. Autostop may be inhibited to
allow for charging of the vehicle
battery.
Exhaust filter 3 188.
Ignition switch positions
Turn key: