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Climate control141
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 3 117.
Vehicle personalisation 3 121.
Temperature preselection
TEMP
Set temperature by turning controller
TEMP to the desired value.
Selected temperature is indicated in
the climate 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 AC 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 button V. Activation is
indicated by 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 button V. To return to automatic
mode: press button AUTO.
Setting of automatic rear window
heating 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 3 117.
Vehicle personalisation 3 121.
Notice
If the V button is pressed while the
engine is running, an Autostop will
be inhibited until the V button is
pressed again.
If the V button is pressed while the
engine is in an Autostop, the engine will restart automatically.
Stop-start system 3 156.
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Climate control145
Temperature preselection SR
Set desired temperature by touching
R for higher temperatures or S for
lower temperatures.
Selected temperature is indicated in
the panels. Using driver's side panel
changes temperatures for both sides (when SYNC is selected), while using
the passenger side panel changes
only the passenger side temperature and turns off SYNC, (if selected
before).
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 AC is switched on, reducing the set
cabin temperature can cause the
engine to restart from an Autostop or
inhibit an Autostop.
Dual zone temperature
synchronisation SYNC
Press SYNC to link passenger side
temperature setting to the driver side.
Activation is indicated by the LED in
the button.
When passenger side settings will be adjusted, the LED extinguishes.Demisting and defrosting the
windows V
■
Press button V. Activation is
indicated by 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 button V. To return to automatic
mode: press button AUTO.
Page 148 of 321

146Climate control
Setting of automatic rear window
heating based on cool outside
temperatures 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 3 117.
Vehicle personalisation 3 121.
Notice
If the V button is pressed while the
engine is running, an Autostop will
be inhibited until the V button is
pressed again.
If the V button is pressed while the
engine is in an Autostop, the engine
will restart automatically.
Stop-start system 3 156.
Manual settings Climate control system settings can
be manually adapted by using the air
distribution buttons and the fan speed
controller as follows. Manual
changing of settings will deactivate
the automatic mode.Fan speed S
ZR
Touch ZS or R. The selected fan
speed is indicated in the Info-Display for a short time.
If the fan is switched off, the air
conditioning is also deactivated.
To return to automatic mode: Press AUTO button.
Air distribution l, M , K
Press appropriate button for desired
adjustment. Activation is indicated by the LED in the button.
l=to windscreen and front door
windows.M=to head area via adjustable air
vents.K=to foot well.
Combinations are possible.
Return to automatic air distribution:
press button AUTO.
Page 152 of 321
150Climate control
Active carbon filterIn addition to the particle filter, the
active carbon filter reduces odours.
Filter replacement must be carried out
during a regular service.
Air conditioning regular
operation In order to ensure continuously
efficient performance, it is
recommended that air coditioning
should be operated for a few minutes once a month, irrespective of the
weather and time of year.
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
Page 154 of 321

152Driving and operatingStarting 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 diesel particle filter may take
place more often.
Diesel particle filter 3 159.
Ignition switch positions
Turn key:0=Ignition off: some functions
remain active until key is
removed or driver's door is
opened, if ignition was on
previously.1=Accessory power mode: Steering
wheel lock released, some
electrical functions are operable,
ignition is off.2=Ignition on power mode: Ignition
is on, diesel engine is preheating.
Control indicators light up and the
most electrical functions are
operable.3=Engine start . Release key after
starting procedure begins.Steering wheel lock
Remove key from the ignition switch
and turn steering wheel until it
engages.
Power button
Electronic key must be inside the
vehicle.
Accessory power mode: press
Engine Start/Stop button once
without operating clutch or brake pedal. The yellow LED in the button
illuminates. Steering wheel lock is
released and some electrical
functions are operable, ignition is off.
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Driving and operating153
Ignition on power mode: press and
hold Engine Start/Stop button for
6 seconds without operating clutch or brake pedal. The green LED in the
button illuminates, diesel engine is
preheating. Control indicators light up
and the most electrical functions are
operable.
Engine start: operate clutch pedal
(manual transmission) or brake pedal (automatic transmission) and press
Engine Start/Stop button once more.
Release button after starting
procedure begins.
Ignition off: press Engine Start/Stop
button briefly in each mode or when
engine is running. Some functions
remain active until driver's door is
opened, if ignition was on before.
Steering wheel lock
The steering wheel lock activates
automatically when:
■ the vehicle is stationary and
■ the ignition has been switched off and
■ the driver's door is opened.To release steering wheel lock, open
and close driver's door and switch on accessory mode or start the engine
directly.9 Warning
If the vehicle battery is discharged,
the vehicle must not be towed,
tow-started or jump-started as the
steering wheel lock cannot be
disengaged.
Emergency operation on
vehicles with electronic key
system
If either the electronic key fails or the
battery of the electronic key is weak,
the Driver Information Centre may
display No Remote Detected or
Replace Battery in Remote Key when
you try to start the vehicle.Open the centre console storage area by lifting up the armrest. Place the
electronic key in the transmitter
pocket. Depress the clutch pedal
(manual transmission) or the brake
pedal (automatic transmission) and
press the Engine Start/Stop button.
To switch off the engine, press the Engine Start/Stop button again.
Remove the electronic key from the
transmitter pocket.
This option is intended for
emergencies only. Replace the
electronic key battery as soon as
possible 3 21.
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154Driving and operating
For unlocking or locking the doors see
fault in radio remote control unit or
electronic key system 3 22.
Retained power off
The following electronic systems can
work until the driver's door is opened
or for 10 minutes after the ignition is
switched off:
■ Power windows
■ Sunroof
■ Power outlets
Power to the Infotainment system will continue to operate for 30 minutes
when ignition is off, regardless of
whether any door will be opened.Starting the engine
Vehicles with ignition switch
Manual transmission: operate clutch
and brake pedal.
Automatic transmission: operate
brake pedal and move selector lever
to P or N.
Do not operate accelerator pedal.
Diesel engine: turn the key to position 2 for preheating until control
indicator ! extinguishes.
Turn key briefly to position 3 and
release: an automatic procedure operates the starter with a short delay
until the engine is running, see
Automatic Starter Control.
Before restarting or to switch off the
engine, turn key back to position 0.
During an Autostop, the engine can
be started by depressing the clutch
pedal 3 156.
Vehicles with power button
Manual transmission: operate clutch
and brake pedal.
Page 158 of 321

156Driving and operatingStop-start systemThe stop-start system helps to save
fuel and to reduce the exhaust
emissions. When conditions allow, it
switches off the engine as soon as the
vehicle is at a low speed or at a
standstill, e.g. at a traffic light or in a
traffic jam. It starts the engine
automatically as soon as the clutch is depressed. A battery sensor ensures
that an Autostop is only performed if
the vehicle battery is sufficiently
charged for a restart.
Activation
The stop-start system is available as
soon as the engine is started, the
vehicle starts-off and the conditions
as stated below in this section are
fulfilled.Deactivation
Deactivate the stop-start system
manually by pressing the eco button.
The deactivation is indicated when
the LED in the button extinguishes.
Autostop
If the vehicle is at a low speed or at a
standstill, activate an Autostop as
follows:
■ Depress the clutch pedal
■ set the lever to neutral
■ release the clutch pedal
The engine will be switched off while
the ignition stays on.
An Autostop is indicated by the
needle at the AUTOSTOP position in
the tachometer. On some versions a
control indicator in the instrument
cluster lights up when engine is in Autostop.
During an Autostop, the heating and
brake performance will be
maintained.