Page 145 of 285
Climate control143Air vents
Adjustable air vents Air vents in the instrument panel
Direct the flow of air by tilting and
swivelling the slats.
To close the vent, swivel the slats
inwards.
Outer air vents in the instrument
panel
Direct the flow of air by tilting and
swivelling the slats.
To close the vent, swivel the slats
outwards.
At least two air vents must be open
while cooling is on.
9 Warning
Do not attach any objects to the
slats of the air vents. Risk of
damage and injury in case of an
accident.
Rear air vents in the centre
console
To activate the distribution of
climatised / heated air via the rear air
vents, press E.
Direct the flow of air by tilting and
swivelling the slats.
Adjust the air flow to select the
desired speed.
x:increase air flowx:decrease air flow
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144Climate controlFixed air vents
Additional air vents are located
beneath the windscreen, the door
windows and in the foot wells.
Glovebox cooler The air conditioning system draws
cooled air into the glovebox through a
noozle.
Turn the slider up or down in order to
enable or disable glovebox cooling.
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
Page 147 of 285

Driving and operating145Driving and
operatingDriving hints ............................... 146
Control of the vehicle ...............146
Steering ................................... 146
Starting and operating ...............146
New vehicle running-in ............146
Ignition switch positions ...........146
Power button ........................... 147
Starting the engine ..................148
Overrun cut-off ........................ 150
Stop-start system ....................150
Parking .................................... 153
Engine exhaust .......................... 154
Exhaust filter ............................ 154
Catalytic converter ...................154
AdBlue ..................................... 155
Automatic transmission ..............158
Transmission display ...............158
Gear selection ......................... 158
Manual mode ........................... 159
Electronic driving programmes 160
Fault ........................................ 160
Eco mode ................................ 160
Manual transmission ..................161Brakes........................................ 162
Antilock brake system .............162
Parking brake .......................... 163
Brake assist ............................. 165
Hill start assist ......................... 165
Ride control systems .................166
Electronic Stability Control and Traction Control system .........166
Descent control system ...........167
Selective ride control ...............168
Driver assistance systems .........170
Cruise control .......................... 170
Speed limiter ........................... 173
Adaptive cruise control ............175
Forward collision alert .............181
Active emergency braking .......183
Front pedestrian protection .....185
Parking assist .......................... 186
Advanced parking assist .........190
Side blind spot alert .................194
Passenger side camera ...........196
Panoramic view system ...........196
Rear view camera ...................199
Lane keep assist .....................201
Driver alert ............................... 204
Fuel ............................................ 206
Fuel for petrol engines .............206
Fuel for diesel engines ............206
Refuelling ................................ 207Trailer hitch................................ 208
General information .................208
Driving characteristics and towing tips .............................. 209
Trailer towing ........................... 209
Towing equipment ...................210
Trailer stability assist ...............212
Page 148 of 285

146Driving 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 3 150.
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 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.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 engine 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.
Additionally, the cleaning process of
the exhaust filter may take place more
often.
Exhaust filter 3 154.
Ignition switch positions
Turn key:
Page 149 of 285

Driving and operating1470:ignition off: some functions
remain active until key is
removed or driver's door is
opened, provided the ignition was
on previously1:ignition on power mode: ignition
is on, diesel engine is preheating, control indicators illuminate and
most electrical functions are
operable2:engine start: release key after
engine has been started
Steering wheel lock
Remove key from ignition switch and
turn steering wheel until it engages.
9 Danger
Never remove the key from
ignition switch during driving as
this will cause steering wheel lock.
Power button
The electronic key must be inside the
vehicle.
Engine start
Operate the clutch pedal (manual
transmission), the brake pedal and
press Start/Stop .Ignition on power mode without
starting the engine
Press Start/Stop without operating
clutch or brake pedal. Control
indicators illuminate and most
electrical functions are operable.Engine and ignition off
Press Start/Stop briefly in each mode
or when engine is running and vehicle
is stationary. Some functions remain
active until driver's door is opened,
provided the ignition was on
previously.Emergency shut off during driving
Press Start/Stop for about three
seconds 3 148. Steering wheel locks
as soon as vehicle is stationary.
Steering wheel lock
The steering wheel lock activates
automatically when:
● The vehicle is stationary.
● The ignition has been switched off.
To release steering wheel lock, open
and close driver's door and switch the ignition on power mode or start the
engine directly.
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148Driving and operating9Warning
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.
Operation on vehicles with
electronic key system in case of
failure
If either the electronic key fails or the
battery of the electronic key is weak,
a message may be displayed in the
Driver Information Centre.
Hold the electronic key with buttons
outside at the marking on the steering column cover as shown in the
illustration.
Operate the clutch pedal (manual
transmission), the brake pedal and
press Start/Stop .
This option is intended for
emergencies only. Replace the
electronic key battery as soon as
possible 3 24.
For unlocking or locking the doors,
see fault in radio remote control unit
or electronic key system 3 26.Starting the engine
Vehicles with ignition switch
Turn key to position 1 to release the
steering wheel lock.
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 engines: wait until control
indicator ! extinguishes.
Page 151 of 285

Driving and operating149Turn key briefly to position 2 and
release after engine has been
started.
Manual transmission: during an
Autostop, the engine can be started
by depressing the clutch pedal
3 150.
Automatic transmission: during an
Autostop, the engine can be started
by releasing the brake pedal 3 150.
Vehicles with power button● 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.
● Press Start/Stop button.
● Release button after starting procedure begins. Diesel engine
starts after control indicator ! for
preheating extinguishes.
● Before restarting or to switch off the engine when vehicle is
stationary, press Start/Stop once
more briefly.
To start the engine during an
Autostop:
● Manual transmission: during an Autostop, the engine can be
started by depressing the clutch
pedal 3 150.
● Automatic transmission: during an Autostop, the engine can be
started by releasing the brake
pedal 3 150.Emergency shut off during driving
If the engine needs to be switched offduring driving in case of emergency,
press Start/Stop for five seconds.9Danger
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.
Page 152 of 285

150Driving and operatingStarting the vehicle at low
temperatures
Starting 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 vehicle battery.
With temperatures below -30 °C the
automatic transmission requires a
warming phase of approx.
five minutes. The selector lever must
be in position P.
Heating functionalities Note
Individual heating functionalities,
such as heated seats or heated
steering wheel, may be temporarily
unavailable in the event of electrical
loading constraints. Functions will
be resumed after some minutes.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.
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.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.
The system is ready to operate when
the LED in the button Ò is not
illuminated. To activate the system
when the system is deactivated,
press Ó.
If the stop-start system is temporarily
not available and the button Ò is
pressed, the LED in the button
flashes.