Climate control143
Manual settingsClimate 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 Z
Turn controller Z. The selected fan
speed is indicated by the number of segments in the climate display.
If the fan is switched off, the air
conditioning is also deactivated.
To return to automatic mode: Press AUTO .
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
windowsM=to head area via adjustable air
ventsK=to foot well
Combinations are possible.
Return to automatic air distribution:
press AUTO .
Cooling A/C
Press A/C to switch on cooling.
Activation is indicated by the LED in
the button. Cooling is only functional
when the engine is running and
climate control fan is switched on.
Press A/C again to switch off cooling.
The air conditioning system cools and
dehumidifies (dries) cabin air as
required. Therefore condensation
may form and is drained under the
vehicle.
If no cooling or drying is required,
switch off the cooling system for fuel
saving reasons.
148Climate control
Cooling A/C
Press A/C to switch on cooling.
Activation is indicated by the LED in
the button. Cooling is only functional
when the engine is running and
climate control fan is switched on.
Press A/C again to switch off cooling.
The air conditioning system cools and
dehumidifies (dries) cabin air as
required. Therefore condensation
may form and is drained under the
vehicle.
If no cooling or drying is required,
switch off the cooling system for fuel
saving reasons.
System ON/OFF X
Cooling, fan and automatic mode can
be switched off by pressing X. When
the system is deactivated, the LED in the button X is off.
Activation by pressing X or cooling
button A/C or automatic mode button
AUTO . Activation is indicated by the
LED in the button.
Manual air recirculation 4
Press 4 to activate air recirculation
mode. Activation is indicated by the
LED in the button.
Select air recirculation to assist in cooling the interior or in blocking
outside odors or exhaust. When
recirculation is selected, a partial
ventilation to refresh the interior air
will occur every 10 minutes.
Press 4 again to deactivate
recirculation mode.
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 l.
Automatic air recirculation An air humidity sensor switches
automatically to external air if internal air humidity is too high.
Basic settingsSome basic settings can be changedin the vehicle personalisation menu in
the Colour-Info-Display.
Select the relevant settings in
Settings , I Vehicle in the Colour-Info-
Display.
Colour-Info-Display 3 118.
152Driving and operatingDriving and operatingDriving hints............................... 152
Starting and operating ...............153
Engine exhaust .......................... 160
Automatic transmission .............. 164
Manual transmission ..................168
Drive systems ............................ 169
Brakes ........................................ 169
Ride control systems .................172
Driver assistance systems .........177
Fuel ............................................ 210
Trailer hitch ................................ 218Driving hints
Control of the vehicleNever 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 will be a controlled reduction
in power steering assist and vehicle
speed is reduced.
Stop-start system 3 157.
Pedals
To ensure the pedal travel is
uninhibited, there must be no mats in the area of the pedals.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.
Control indicator c 3 107.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.
Driving and operating153Starting 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 3 160.
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 on power mode: 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.
156Driving and operating
Do not operate accelerator pedal.
Press and release Engine Start/Stop:
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 when vehicle is stationary, press Engine Start/Stop once more
briefly.
During an Autostop, the engine can
be started by depressing the clutch
pedal 3 157.
Emergency shut off during
driving If the engine needs to be switched offduring driving in case of emergency,
press Engine Start/Stop for longer
than 2 seconds or press twice briefly
within 5 seconds.9 Danger
Switching off the vehicle engine
during driving may cause loss of
power support of brake and
steering systems. Assistance
systems and airbag systems are
disabled. Lighting and brake lights will extinguish. Therefore powerdown the engine and ignition while
driving only in case of vehicle
emergency.
Starting 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. 5 minutes.
The selector lever must be in position
P .
Automatic Starter Control
This function controls the engine
starting procedure. The driver does
not need to hold the key in position 3
or to hold Engine Start/Stop pressed.
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.
Driving and operating157Stop-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 vehicle battery is sufficiently
charged for a restart.
Activation The stop-start system is available assoon 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 eco. 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.
160Driving and operating
Activate the anti-theft alarm system
3 33.
■ The engine cooling fans may run after the engine has been switchedoff 3 223.Caution
After running at high engine
speeds or with high engine loads,
operate the engine briefly at a low load or run in neutral for
approx. 30 seconds before
switching off, in order to protect
the turbocharger.
Notice
In the event of an accident with airbag deployment, the engine is
turned off automatically if the vehicle
comes to a standstill within a certain time.
Engine exhaust9 Danger
Engine exhaust gases contain
poisonous carbon monoxide,
which is colourless and odourless and could be fatal if inhaled.
If exhaust gases enter the interior
of the vehicle, open the windows.
Have the cause of the fault
rectified by a workshop.
Avoid driving with an open load
compartment, otherwise exhaust
gases could enter the vehicle.
Diesel particle filter
The diesel particle filter system filters
harmful soot particles out of the
exhaust gases. The system includes
a self-cleaning function that runs
automatically during driving without
any notification. The filter is cleaned
by periodically burning off the soot
particles at high temperature. This
process takes place automatically
under set driving conditions and may
take up to 25 minutes. Typically it
needs between 7 and 12 minutes.
Autostop is not available and fuel
consumption may be higher during
this period. The emission of smells
and smoke during this process is
normal.
Under certain driving conditions, e.g.
short distances, the system cannot
clean itself automatically.
If the cleaning of the filter is required
and if previous driving conditions did
not enable automatic cleaning, it will
be indicated by control indicator %.
Simultaneously Diesel partic. filter is
full continue driving appears in the
Driver Information Centre.
% illuminates when diesel particle
filter is full. Start cleaning process as
soon as possible.
Driving and operating161
% flashes and a warning chime
sounds several times when diesel particle filter has reached the
maximum filling level. Start cleaning
process immediately to avoid
damage to the engine.
Cleaning process
To activate cleaning process,
continue driving, keep engine speed
above 2000 revolutions per minute.
Shift down if necessary. Diesel
particle filter cleaning is then started.
If additionally a message appears in
the Driver Information Centre that
cleaning is not possible, seek the
assistance of a workshop.Caution
If the cleaning process is
interrupted, there is a risk of
provoking severe engine damage.
Cleaning takes place quickest at high engine speeds and loads.
The control indicator % extinguishes
as soon as the self-cleaning
operation is complete.
Catalytic converter
The catalytic converter reduces the
amount of harmful substances in the
exhaust gases.Caution
Fuel grades other than those listed on pages 3 210, 3 279 could
damage the catalytic converter or
electronic components.
Unburnt petrol will overheat and
damage the catalytic converter.
Therefore avoid excessive use of the starter, running the fuel tank
dry and starting the engine by
pushing or towing.
In the event of misfiring, uneven
engine running, a reduction in engine performance or other unusual
problems, have the cause of the fault
rectified by a workshop as soon as
possible. In an emergency, driving
can be continued for a short period,
keeping vehicle speed and engine
speed low.
AdBlue 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 (DEF) into the exhaust system.
The designation of the DEF used is AdBlue Ⓡ 1)
. It is a non-toxic, non-
flammable, colourless and odourless fluid which consists of 32% urea and
68% water.1) Registered trademark of the Verband der Automobilindustrie e.V. (VDA).