142Climate controlClimate controlClimate control systems.............142
Heating and ventilation system 142
Air conditioning system ...........143
Electronic climate control system .................................... 144
Auxiliary heater ........................148
Air vents ..................................... 148
Adjustable air vents .................148
Fixed air vents ......................... 149
Maintenance .............................. 149
Air intake ................................. 149
Pollen filter ............................... 149
Air conditioning regular
operation ................................ 149
Service .................................... 149Climate control systems
Heating and ventilation system
Controls for: ● temperature
● air distribution
● fan speed
● demisting and defrosting
Heated rear window Ü 3 33.
Temperature
red:warmblue:coldHeating will not be fully effective until
the engine has reached normal
operating temperature.
Air distributionl:to windscreen and front door
windowsM:to head area via adjustable air
ventsK:to foot well and windscreen
All combinations are possible.
Fan speed
Adjust the air flow by switching the fan to the desired speed.
Demisting 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.
148Climate controldirected 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 3 125.
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.
Driving and operating153Turn 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.
Manual transmission: during an
Autostop, the engine can be started
by depressing the clutch pedal
3 154.
Automatic transmission: during an
Autostop, the engine can be started
by releasing the brake pedal 3 154.
Before restarting or to switch off the
engine, turn the key back to position
0 .9 Danger
Switching off the engine during
driving may cause loss of power
support for brake and steering
systems. Assistance systems and
airbag systems are disabled.
Lighting and brake lights will
extinguish. Therefore power down
the engine and ignition while
driving only when required in case of emergency.
Starting the vehicle at low
temperatures
The start of the engine without
additional heaters is possible down to -25 °С for diesel engines and -30 °C
for petrol engines. Required is an engine oil with the correct viscosity,
the correct fuel, performed services
and a sufficiently charged battery.
With temperatures below -30 °C the
automatic transmission need a
warming phase of approx. five
minutes. The selector lever must be
in position P.
Automatic Starter Control This function controls the engine
starting procedure. The driver does
not have to hold the key in position 3.
Once applied, the system will go on
starting automatically until the engine
is running. Because of the checking
procedure, the engine starts running
after a short delay.Possible reasons for a non-starting
engine:
● Clutch pedal not operated (manual transmission).
● Brake pedal not operated or selector lever not in P or N
(automatic transmission).
● Timeout occurred.
Turbo engine warm-up
Upon start-up, engine available
torque may be limited for a short time,
especially when the engine
temperature is cold. The limitation is
to allow the lubrication system to fully protect the engine.
Overrun cut-off The fuel supply is automatically cut off
during overrun, i.e. when the vehicle
is driven with a gear engaged but accelerator pedal is released.
Depending on driving conditions, the
overrun cut-off may be deactivated.
Driving and operating155● The stop-start system is notmanually deactivated.
● The bonnet is fully closed.
● The driver's door is closed or the driver's seat belt is fastened.
● The vehicle battery is sufficiently charged and in good condition.
● The engine is warmed-up.
● The engine coolant temperature is not too high.
● The engine exhaust temperature is not too high, e.g. after driving
with high engine load.
● The ambient temperature is above -5 °C.
● The climate control system allows an Autostop.
● The brake vacuum is sufficient.
● The self-cleaning function of the diesel particle filter is not active.
● The vehicle was driven at least at
walking speed since the last
Autostop.
Otherwise an Autostop will be
inhibited.Certain settings of the climate control
system may inhibit an Autostop. See
Climate control chapter for more
details 3 144.
Immediately after motorway driving,
an Autostop may be inhibited.
New vehicle running-in 3 151.
Vehicle battery discharge protection
To ensure reliable engine restarts,
several battery discharge protection
features are implemented as part of
the stop-start system.
Power saving measures
During an Autostop, several electrical
features such as auxiliary electric
heater or rear window heating are
disabled or switched into a power-
saving mode. The fan speed of the
climate control system is reduced to
save power.
Restart of the engine by the driver
Depress the clutch pedal to restart the
engine.
When the engine is restarted, control
indicator D in the Driver Information
Centre extinguishes.If the selector lever is shifted out of
neutral before depressing the clutch
pedal first, control indicator -
illuminates or is shown as a message
in the Driver Information Centre.
Control indicator - 3 112.
Restart of the engine by the stop-
start system
The selector lever must be in neutral
to enable an automatic restart.
If one of the following conditions
occurs during an Autostop, the
engine will be restarted automatically
by the stop-start system.
● The stop-start system is manually deactivated.
● The bonnet is opened.
● The driver's seat belt is unfastened and the driver's door
is opened.
● The engine temperature is too low.
● The charge level of the vehicle battery is below a defined level.
● The brake vacuum is not sufficient.
Driving and operating159AdBlue
General information
The selective catalytic reduction
(BlueInjection) is a method to
substantially reduce the nitrogen
oxides in the exhaust emission. This
is achieved by injecting a Diesel
Exhaust Fluid into the exhaust
system. The ammonia released by
the fluid reacts with nitrous gases
(NO x) from the exhaust and turns it
into nitrogen and water.
The designation of this fluid is
AdBlue ®
. It is a non-toxic, non-
flammable, colourless and odourless
fluid which consists of 32% urea and
68% water.9 Warning
Avoid contact of your eyes or skin
with AdBlue.
In case of eye or skin contact,
rinse off with water.
Caution
Avoid contact of the paintwork with AdBlue.
In case of contact, rinse off with water.
AdBlue freezes at a temperature of
approx. -11 °C. As the vehicle is
equipped with an AdBlue pre-heater,
the emissions reduction at low
temperatures is ensured. The AdBlue
pre-heater works automatically.
The typical AdBlue consumption is
approx. 1.2 litres per 1000 km for
vehicles with engine B16DTH or
B16DTJ and approx. two litres per
1000 km for vehicles with engine
B20DTH. The consumption can also
be higher depending on driving
behaviour (e.g. high load or towing).
AdBlue tank
At a remaining volume of approx. five litres, there is a liquid level switch.
Warning messages are displayed
only below that threshold. Tank
volume 3 273.
Level warnings
Depending on the calculated range of AdBlue, different messages are
displayed in the Driver Information
Centre. The messages and the
restrictions are a legal requirement.
The first possible warning is AdBlue
Range: 2400 km .
This warning will show up once briefly with the calculated range. Driving is
possible without any restrictions.
The next warning level is entered with
a range below 1750 km. The
message with the current range will
always be displayed when ignition is
switched on and needs to be
confirmed 3 117 . Refill AdBlue before
entering the next warning level.
At an AdBlue range below 900 km,
the following warning messages are
alternately displayed and cannot be
dismissed:
● AdBlue Low Refill Now
● Engine Restart Prevented in 900
km .
Additionally, control indicator Y
flashes continuously.
Driving and operating203Note
In the event of an accident, switch off
the ignition and lights.
Refuelling9 Danger
Before refuelling, switch off
ignition and any external heaters
with combustion chambers.
Switch off any mobile phones.
Follow the operating and safety
instructions of the filling station
when refuelling.
9 Danger
Fuel is flammable and explosive.
No smoking. No naked flames or
sparks.
If you can smell fuel in your
vehicle, have the cause of this
remedied immediately by a
workshop.
Caution
In case of misfuelling, do not
switch on ignition.
Fuel filler flap is located at right rear
side of the vehicle.
The fuel filler flap can only be opened
if the vehicle is unlocked. Release the
fuel filler flap by pushing the flap.
Petrol and Diesel refuelling To open, turn the cap slowly
anticlockwise.
Vehicle care233No.Circuit16Starter17Transmission control module18Heated rear window19Front power windows20Rear power windows21Rear electrical centre22Left high beam (Halogen)23–24Right headlight (LED)25Left headlight (LED)26Front fog lights27Diesel fuel heating28Stop-start system29Electric parking brake30ABS31Adaptive cruise control32AirbagNo.Circuit33Adaptive forward lighting/Auto‐
matic light control34Exhaust gas recirculation35Exterior mirror/Rain sensor36Climate control37Canister vent solenoid38Vacuum pump39Central control module40Windscreen washer/Rear
window washer system41Right high beam (Halogen)42Radiator fan43Windscreen wiper44Windscreen wiper45Radiator fan46–47Horn48Radiator fanNo.Circuit49Fuel pump50Headlamp levelling/Adaptive
forward lighting51Air shutter52Auxiliary heater/Diesel engine53Transmission control module/
Engine control module54Vacuum pump/Instrument
panel cluster/Heating ventila‐
tion/Air conditioning system
After having changed defective fuses,
close the fuse box cover and press
until it engages.
If the fuse box cover is not closed
correctly, malfunctions may occur.
286IndexAAccessories and vehicle modifications .......................... 215
Active Emergency Braking .........186
Active head restraints ...................37
Adaptive cruise control .......117, 176
AdBlue ........................ 115, 159, 260
Adjustable air vents ...................148
Airbag and belt tensioners .........111
Airbag deactivation ..............59, 112
Airbag label................................... 54
Airbag system .............................. 54
Air conditioning regular operation ................................ 149
Air conditioning system .............. 143
Air intake .................................... 149
Air vents...................................... 148
Antilock brake system ................ 166
Antilock brake system (ABS) .....113
Anti-theft alarm system ................26
Anti-theft locking system .............. 26
Appearance care ........................255
Armrest ......................................... 42
Armrest storage ........................... 69
Ashtrays ..................................... 103
Automatic anti-dazzle ..................30
Automatic light control ...............133
Automatic locking ........................24
Automatic transmission .............162Autostop..................................... 154
Auxiliary heater ........................... 148
B Battery discharge protection ......141
Battery voltage ........................... 124
Bicycle rack .................................. 70
BlueInjection ............................... 159
Bonnet ....................................... 216
Brake and clutch fluid .................260
Brake and clutch system ...........112
Brake assist ............................... 168
Brake fluid .................................. 220 Brakes ............................... 166, 220
Breakdown.................................. 253
Bulb replacement ....................... 223
C Capacities .................................. 273
Cargo management system ........88
Car Pass ...................................... 21
Catalytic converter .....................158
Central locking system ................22
Centre console lighting ..............140
Centre console storage ...............69
Changing tyre and wheel size ...243
Charging system ........................ 112
Child locks ................................... 25
Child restraint installation locations ................................... 63
Child restraints.............................. 60