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112Climate control9Warning
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 might mist up from outside, when cold air is
directed to it. If windscreen mists up
from outside, activate windscreen
wiper and deactivate s.
Auxiliary heater Air heater
Quickheat is an electric auxiliary air
heater which automatically warms up
the passenger compartment more
quickly.
Coolant heater
Diesel-engined vehicles have a fuel-
powered auxiliary heater.Air vents
Adjustable air vents At least one air vent must be open
while cooling is on in order to prevent
the evaporator from icing up due to
lack of air movement.
Set the direction of the air flow by
turning the adjuster wheel from right to left and raise or lower the horizontal slats.
Page 118 of 231

116Driving and operating
During an Autostop, the engine can
be started by depressing the clutch
pedal.
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. 5 minutes. The selector lever must be in position
P .
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 is released. Overrun cut-
off is deactivated if catalytic converter
temperature is high.
Stop-start system
The 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 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 by the
LED in the button going off.
Autostop
If the vehicle is at a low speed or at a standstill, activate an Autostop as
follows:
■ Depress the clutch pedal
■ shift the selector lever to neutral
■ release the clutch pedal
The engine will be switched off while the ignition stays on.
Page 139 of 231

Driving and operating137Refuelling9Danger
Before refuelling, switch off engine
and any external heaters with
combustion chambers (identified
by sticker on fuel filler flap). 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 vehicle.
With a central locking system with
remote control, the tank flap is
unlocked at the same time as the
doors.
Pul flap at the recess and open.
Unlock the fuel filler cap with the
ignition key. To open, turn the cap
slowly to the left. The fuel filler cap
can be retained in the bracket on the
fuel filler flap.
For refuelling, fully insert the pump
nozzle and switch it on.
After automatic cut-off, it can be
topped up with max. two doses of fuel.
Caution
Wipe off any overflowing fuel
immediately.
Page 170 of 231
168Vehicle care
No.Circuit1Starter2Air conditioning system3Diesel fuel filter heater4Horn5Manual transmission auto‐
mated, automatic transmission6Engine control unit7Fog lights8Engine cooling9Engine cooling10Manual transmission auto‐
mated11Glow plugs, ignition system12Headlight range adjustment,
Adaptive forward lighting13Air conditioning system14Manual transmission auto‐
mated15High beam (right)No.Circuit16High beam (left)17Main relay18Engine control unit19Airbags20Main relay21Main relay22Central control unit23Tyre repair kit24Fuel pump25ABS26Heated rear window27ABS28Interior fan29Cigarette lighter30Air conditioning system31Power window (left)32Power window (right)No.Circuit33Heated exterior mirrors34–35–
Instrument panel fuse box
In left-hand drive vehicles, the fuse
box is behind the light switch. Pull the top edge of the panel and fold down.
Page 172 of 231
170Vehicle care
The fuse box is on the left side of theload compartment behind a cover.
Remove the cover.No.Circuit1Adaptive forward lighting2–3Seat heater (left)4Seat heater (right)5–6–No.Circuit7–8Rear carrier system, towing
equipment9–10–11–12–13–14–15Rear carrier system, towing
equipment16–17SunroofVehicle tools
Tools
To open the compartment, disengagethe cover and open it, or, depending
on the version, lift the floor cover.
Page 226 of 231

224IndexAAccessories and vehicle modifications .......................... 145
Active head restraints ..................35
Adaptive forward lighting ..........
.................................. 85, 100, 156
Adjustable air vents ...................112
Airbag and belt tensioners ...........80
Airbag deactivation ................46, 80
Airbag label................................... 41 Airbag system .............................. 41
Air conditioning regular operation ................................ 113
Air conditioning system .............. 107
Air intake .................................... 113
Air vents...................................... 112
Antilock brake system ................ 128
Antilock brake system (ABS) .......82
Anti-theft alarm system ................25
Anti-theft locking system .............. 25
Appearance care ........................191
Apply footbrake ............................ 84 Ashtrays ....................................... 75
Automatic anti-dazzle ..................29
Automatic light control .................98
Automatic locking ........................24
Automatic transmission .............120
Auxiliary heater ........................... 112B
Battery discharge protection ......105
Battery voltage ............................. 90
Bicycle rack .................................. 54
Bonnet ....................................... 147
Brake and clutch fluid .................195
Brake and clutch system .............81
Brake assist ............................... 130
Brake fluid .................................. 150
Brake light switch ......................... 90
Brakes ............................... 128, 150
Breakdown.................................. 189
Bulb replacement ....................... 153
C Capacities .................................. 216
Car Pass ...................................... 19
Catalytic converter .....................120
Central locking system ................21
Centre console lighting ..............105
Changing tyre and wheel size ...176
Charging system .......................... 80
Child locks ................................... 24
Child restraint installation locations ................................... 49
Child restraints.............................. 48
Child restraint systems ................48
Cigarette lighter ........................... 75
Climate control ............................. 15