Page 129 of 233
Climate control127ServiceFor 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
Notice
Refrigerant R-134a contains
fluorinated greenhouse gases with a global warming potential of 1430.
Front air conditioning system is filled
with 0.58 kg and has a CO 2
equivalent of 0.83 tonnes, the front
and rear air conditioning system is
filled with 0.88 kg and has a CO 2
equivalent of 1.26 tonnes.Depending on vehicle, information
regarding air conditioning refrigerant
appears on a label located in the
engine compartment.
Page 130 of 233

128Driving and operatingDriving and
operatingDriving hints ............................... 128
Driving economically ...............128
Control of the vehicle ...............129
Steering ................................... 129
Starting and operating ...............130
New vehicle running-in ............130
Ignition switch positions ...........130
Power button ........................... 130
Starting the engine ..................132
Idle speed control ....................133
Vehicle shutdown ....................133
Overrun cut-off ........................ 134
Stop-start system ....................134
Parking .................................... 137
Engine exhaust .......................... 138
Diesel particle filter ..................138
Catalytic converter ...................138
AdBlue ..................................... 139
Manual transmission ..................145
Brakes ........................................ 145
Antilock brake system .............146
Parking brake .......................... 146Brake assist............................. 147
Hill start assist ......................... 147
Ride control systems .................147
Traction Control system ..........147
Electronic stability program .....148
Driver assistance systems .........150
Cruise control .......................... 150
Speed limiter ........................... 153
Parking assist .......................... 153
Rear view camera ...................155
Fuel ............................................ 158
Fuel for diesel engines ............158
Refuelling ................................ 158
Fuel consumption - CO 2-
Emissions .............................. 159
Trailer hitch ................................ 160
General information .................160
Driving characteristics and towing tips .............................. 160
Trailer towing ........................... 161
Trailer stability assist ...............161Driving hints
Driving economically
ECO mode
ECO mode is a function that
optimises fuel consumption. It affects engine power and torque,
acceleration, gear shift indication,
heating, air conditioning and electrical consumers.
Activation
Press ECO. Control indicator ECO
illuminates in the instrument cluster when activated.
Page 131 of 233

Driving and operating129Notice
The use of ECO mode may affect the
performance of the climate control
system 3 114.
During driving, it is possible to
temporarily disable ECO mode, e.g.
to increase engine performance, by
depressing the accelerator pedal
firmly.
ECO mode is reactivated when
pressure is reduced on the
accelerator pedal.
Deactivation
Press ECO again. Control indicator
ECO extinguishes in the instrument
cluster.
Control of the vehicle
Never coast with engine not
running (except during Autostop)
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,
but there may be a controlled
reduction in power steering assist and
vehicle speed is reduced.
Stop-start system 3 134.
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.
Driving downhill
Engage a gear when driving downhill
to ensure that sufficient brake
pressure is available.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.Caution
Vehicles equipped with hydraulic
power steering:
If the steering wheel is turned until it reaches the end of its travel, and
is held in that position for more
than 15 seconds, damage may
occur to the power steering
system and there may be loss of
power steering assist.
Page 132 of 233

130Driving and operatingStarting and operating
New vehicle running-in
Do not brake unnecessarily hard for
the first few journeys and after new
disc brake pads have been fitted.
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. Autostop may be
inhibited to allow for charging the
vehicle battery.
Stop-start system 3 134.
Diesel particle filter 3 138.
Ignition switch positions
Turn key:0:ignition off: Some functions
remain active until key is
removed or driver's door is
opened, provided the ignition was on previously1:accessory power mode: Steering
wheel lock released, some
electrical functions are operable,
ignition is off2:ignition is on, diesel engine is
preheating. Control indicators
illuminate and most electrical
functions are operable3:engine start: Release key after
starting procedure beginsSteering 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
Electronic key must be inside the
vehicle, either in the card reader or
the front passenger compartment.
Page 133 of 233

Driving and operating131If the electronic key is not inside the
vehicle, a corresponding message
appears in the Driver Information
Centre 3 100.
Notice
Do not put the electronic key in the
load compartment during driving, as
this is outside of the detection zone
(indicated by a warning chime at low
speed 3 102 and a message in the
Driver Information Centre 3 101).
Notice
In the event the electronic key is kept in the front passenger compartment
and a message appears in the Driver
Information Centre (possibly
accompanied by a warning chime) indicating that it is out of reception
range, we recommend inserting the
electronic key in the card reader.
Some functions, e.g. Infotainment
system, are available for use as soon
as you enter the vehicle.Accessory power mode
Press START/STOP without
operating clutch or brake pedal to
enable further electrical functions to
be operated.
These functions switch off
automatically after a delay.
Engine start
Operate clutch and brake pedal and
press START/STOP . Release button
after starting procedure begins.
If a gear is engaged, the engine can
be started only by operating the clutch
pedal and pressing the
START/STOP button.
In some cases, it may be necessary
to move the steering wheel slightly
while pressing START/STOP to
release the steering wheel lock. A
corresponding message appears in
the Driver Information Centre 3 100.
At very low outside temperatures (e.g. below -10 °C) keep the clutch pedal
depressed while pressing
START/STOP until the engine starts.If one of the starting conditions is not
applied, a corresponding message
appears in the Driver Information
Centre 3 100.
Vehicle messages 3 101.
Engine stop
Electronic key must be inside the
vehicle, either in the card reader or the front passenger compartment.
With the vehicle stationary, press
START/STOP to stop the engine. The
steering wheel lock is engaged when
the driver's door is opened and the
vehicle is locked.
If the electronic key is not detected, a corresponding message appears in
the Driver Information Centre 3 100.
In this event, press START/STOP for
two seconds to stop the engine.
Central locking system 3 24.
Retained power off
Press START/STOP for more than
two seconds; the engine is stopped
while some functions, e.g.
Infotainment system, are available for
use for approx. 10 minutes.
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132Driving and operatingThese functions stop working when
the driver's door is opened and the
vehicle is locked.
Notice
Always take the electronic key with you when exiting the vehicle.
The electronic key being left in the
card reader is indicated by a warning
chime 3 102 and a message in the
Driver Information Centre 3 101
when the driver's door is opened.9 Danger
Never leave an electronic key
inside the vehicle when children or animals are left in the vehicle, to
avoid unintended operation of
windows, doors or engine. Risk of
fatal injury.
Fault
If the engine cannot be started, the
cause may be one of the following:
● Fault in electronic key.
● Electronic key out of reception range.
● Battery voltage too low.
● Overload of the central locking system by operating at frequentintervals, the power supply is
interrupted for a short time.
● Interference from higher-power radio waves from other sources.
Battery replacement 3 20.
Central locking system 3 24.
Electronic key system 3 22.
Starting the engine
Manual transmission: operate clutch.
Do not accelerate.
Diesel engines: turn the key to
position 2 for preheating until control
indicator ! extinguishes in the
instrument cluster 3 98.
Turn key to position 3 and release.
The increased engine speed
automatically returns to normal idling
speed as the engine temperature
rises.
Start attempts should not last longer
than 15 seconds. If engine does not
start, wait 15 seconds before
repeating starting procedure. If
necessary, depress accelerator
before repeating starting procedure.
Before restarting or to switch off the
engine, turn key back to 0.
During an Autostop, the engine can
be started by depressing the clutch
pedal.
Stop-start system 3 134.
Page 135 of 233

Driving and operating133Turbo engine warm-upUpon 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.
Idle speed control
To increase the idle speed, press the switch. After a few seconds the
function will be activated.
The function will be deactivated
when:
● The clutch pedal is depressed.
● The accelerator pedal is depressed.
● Vehicle speed is above 0 mph. ● Control indicator F, W or C
illuminate in the instrument
cluster.
To increase or decrease the fast idle
speed rate, consult a workshop.
Notice
When the fast idle function is
activated, the stop-start system is
automatically deactivated.
Stop-start system 3 134.
Vehicle shutdown
Fuel cut-off system
If the vehicle runs out of fuel, the fuel
system is cut-off and must be reset
after refuelling. A corresponding
warning message may also appear in the Driver Information Centre 3 100.9
Danger
If you can smell fuel in the vehicle,
or a fuel leak is present, have thecause of this remedied
immediately by a workshop. Do
not reset the fuel cut-off system, to avoid the risk of fire.
Resetting with remote control
key / manual key
To reset the fuel cut-off system and
enable the vehicle to be driven:
1. Turn the ignition key to position 2
3 130.
2. Wait a few minutes to allow the fuel system to be reset.
3. Turn key to position 3 to start the
engine.
If the engine does not start, repeat the
procedure.
Page 136 of 233

134Driving and operatingResetting with electronic key
system
To reset the fuel cut-off system and
enable the vehicle to be driven:
1. Insert the electronic key in the card reader 3 130.
2. Press START/STOP without
depressing any pedals.
3. Wait a few minutes to allow the fuel system to be reset.
If the engine does not start, repeat the
procedure.
Electronic key system 3 22.
Power button 3 130.
Refuelling 3 158.
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. It restarts the engine
automatically as soon as the clutch
pedal is depressed.
A vehicle battery sensor ensures that an Autostop is only performed if thevehicle 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.
If the below conditions are not
fulfilled, an Autostop is prohibited and
control indicator \ illuminates in the
instrument cluster 3 99.Deactivation
Deactivate the stop-start system
manually by pressing Î. LED in the
button illuminates to indicate
deactivation and a corresponding message appears in the Driver
Information Centre 3 100.
If deactivated manually, it is possible to reactivate the stop-start system by
pressing Î again; LED extinguishes
in the button and a corresponding
message appears in the Driver
Information Centre. The system is
reactivated automatically the next
time the ignition is switched on.
Vehicle messages 3 101.