Climate control145● Cooling must be activated in theclimate setting menu for optimalcooling and demisting. Press
Climate to enter the menu and
follow the touch button to switch on air conditioning A/C.
● Set the preselected temperatures separately for
driver and front passenger using
the left and right rotary knob.
Recommended temperature is
22 °C. Temperature is indicated
briefly in displays beside the
rotary knobs and in the climate setting menu.
● Air recirculation mode n
should be deactivated. When
deactivated the LED in the button is not illuminated.
Manual settings Climate control system settings can
be changed by activating the buttons
and rotary knobs as described below.
Changing a setting will deactivate the
automatic mode.Fan speed (
)
Press upper button ( to increase or
lower button ) to decrease fan speed.
The fan speed is indicated as pop-up in the Info Display. Fan speed can
also be changed by touch buttons in
the climate setting display. Press
Climate to enter the menu.
Pressing the lower button ) for longer:
fan and cooling are switched off.
To return to automatic mode: press
AUTO .
Air distribution w, x , y
Press Climate to enter the menu.
Touch:
w:to windscreen and front door
windowsx:to head area and rear seats via
adjustable air ventsy:to front and rear foot well and
windscreen
To return to automatic air distribution
press AUTO .
Driving and operating1530: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
operable. To turn the key from
position 2 to 1 or 0, first push the
key all the way in towards the steering column.3:engine start: Release key after
starting procedure begins
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
Electronic key must be inside the
vehicle.
Accessory power mode
Press Engine Start/Stop once without
operating clutch or brake pedal. The yellow LED in the button illuminates.
Steering wheel lock is released and
some electrical functions are
operable, ignition is off.Ignition on power mode
Press and hold Engine Start/Stop for
six seconds without operating clutch
or brake pedal. The green LED in the button illuminates, diesel engine is
154Driving and operatingpreheating. Control indicators
illuminate and most electrical
functions are operable.Engine start
Press Engine Start/Stop briefly while:
● manual transmission: operating clutch pedal,
● automatic transmission: operating brake pedal with
selector lever in P or N.
Starting the engine 3 155.Ignition off
Press Engine Start/Stop briefly when
Autostop is activated or when engine is running and vehicle is stationary.
Automatic transmission: apply the
parking brake and engage P.
Press Engine Start/Stop briefly
without operating clutch or brake pedal when in ignition on power
mode.
Some functions remain active until
driver's door is opened, provided the
ignition was on previously.Emergency engine shut off during
driving
Press Engine Start/Stop for more
than 2 seconds or press twice briefly
within 5 seconds 3 155.
Steering wheel lock The steering wheel lock activates
automatically when:
● The vehicle is stationary.
● The ignition has been switched off.
● The driver's door is opened.
To release steering wheel lock, open
and close driver's door and switch on accessory mode or start the engine
directly.9 Warning
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,
the Driver Information Centre may
display No Remote Detected or
Replace Battery in Remote Key when
you try to start the vehicle.
Open the cover of the centre console
in front of the selector lever. Place the
electronic key across with buttons
upside in the transmitter pocket
beside the power outlet, as shown in
the illustration.
158Driving and operatingIndication
An Autostop is indicated by the
needle at the AUTOSTOP position in
the tachometer.
After restarting, the idle speed is
indicated.
During an Autostop, the heating and
brake performance will be
maintained.
Conditions for an Autostop
The stop-start system checks if each
of the following conditions is fulfilled:
● The stop-start system is not manually 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.
● Between the last restart and a new Autostop must be about10 seconds.
● The self-cleaning function of the exhaust filter is not active.
● The vehicle was driven at least at
walking speed since the last
Autostop.
Otherwise an Autostop will be
inhibited.The stop-start system will be
deactivated on inclines of 12% or
more.
Certain settings of the climate control
system may inhibit an Autostop. See
Climate control chapter for more
details 3 140.
Immediately after motorway driving,
an Autostop may be inhibited.
New vehicle running-in 3 152.
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 e.g. auxiliary electric heater
or heated rear window are disabled or switched to a power saving mode.
The fan speed of the climate control
system is reduced to save power.
Driving and operating167Steering wheel paddles
Move selector lever out of position D
towards the left in position M.
Manual mode M can be activated
from position D in each driving
situation and speed.
Pull steering wheel paddles to select
gears manually.
Pull right paddle + to shift to a higher
gear.
Pull left paddle - to shift to a lower
gear.
Multiple pulls allow gears to be
skipped.
The selected gear is indicated in the
instrument cluster.
Temporary manual mode in drive
mode D
Manual paddle shifting is also
possible in automatic mode D. Upon
completion of manual shifting
operation, transmission changes to
automatic mode D after a defined
time.
To interrupt manual mode and return
to D, do one of the following:
● Press + paddle for 1 second.
● Move selector lever towards the left to manual mode and back to
position D.
If the vehicle is at a standstill and
engine is idling, the transmission will
remain in temporary manual mode. It
changes to automatic mode when
accelerator pedal is operated for a
defined time, and no paddle shifting
at the steering wheel is performed.
General
If a higher gear is selected when
vehicle speed is too low, or a lower
gear when vehicle speed is too high,the shift is not executed. This can
cause a message in the Driver
Information Centre.
In manual mode, no automatic
shifting to a higher gear takes place
at high engine revolutions, except
activating the kickdown function.
Gear shift indication
The symbol R or S with a number
beside it is indicated when gear
shifting is recommended for fuel
saving reasons.
Shift indication appears only in
manual mode.
Electronic driving programmes
● When SPORT mode is engaged,
the vehicle shifts at higher engine speeds (unless cruise control is
on).
SPORT mode 3 176.
168Driving and operating● Special programmesautomatically adapt the shiftingpoints when driving up inclines or
down hills.
● In snowy or icy conditions or on other slippery surfaces, the
electronic transmission control
enables the driver to manually
select first, second or third gear
for starting off.
Kickdown Pressing down the accelerator pedal
beyond the kickdown detent will lead to maximum acceleration
independent of the selected driving
mode. The transmission shifts to a
lower gear depending on engine
speed and shifts to a higher gear at
high engine revolutions.
Overheat protection
In the event of transmission-
overheating due to high outside
temperatures or sporty driving style,
the torque and the maximum speed of the engine can be temporarily
reduced.Fault
In the event of a fault a vehicle
message is displayed in the Driver
Information Centre.
Vehicle messages 3 122.
6-gear automatic transmission:
electronic transmission control
enables only fourth gear; 8-gear
automatic transmission: electronic
transmission control enables only
third gear. The transmission no
longer shifts automatically.
Have the cause of the fault remedied
by a workshop.
Interruption of power supply
In the event of an interruption of
power supply, the selector lever
cannot be moved out of the P
position.
The ignition key cannot be removed from the ignition switch.
If the vehicle battery is discharged,
start the vehicle using jump leads
3 269.
If the vehicle battery is not the cause
of the fault, release the selector lever.1. Apply parking brake.
2. Release the selector lever trim from the centre console. Poke
with a finger into the leather
socket beside the selector lever
and pull the trim up carefully, there
is a cable attached to it. Slide trim slightly forward as it is hinged on
its rear side. Tilt loose trim to the
left side to aviod tensioning the
cable.
Driving and operating173Fault
Failure mode of electric parking brake
is indicated by a control indicator j
and by a vehicle message which is
displayed in the Driver Information Centre.
Vehicle messages 3 122.
Control indicator m flashes: electric
parking brake is not fully applied or released. When continuously
flashing, release electric parking
brake and retry applying.
Brake assist If brake pedal is depressed quickly
and forcefully, maximum brake force
is automatically applied.
Operation of brake assist might
become apparent by a pulse in the
brake pedal and a greater resistance when depressing the brake pedal.
Maintain steady pressure on the
brake pedal as long as full braking is
required. Maximum brake force is
automatically reduced when brake
pedal is released.Hill start assist
The system helps preventing
unintended movement when driving
away on inclines.
When releasing the brake pedal after
stopping on an incline, brakes remain
on for further 2 seconds. The brakes
release automatically as soon as the
vehicle begins to accelerate. The hill
start assist will not activate if one of
the following conditions occurs:
● forward gear is engaged when facing downhill
● reverse gear is engaged when facing uphill
● driver seat belt is unfastened
● driver's door is open
Extended hill start assist
This function holds the vehicle
stationary for up to 5 minutes after the brake pedal is released.
The electric parking brake will be
automatically activated to prevent
vehicle movement when one of the
following conditions occurs:● extended hill start assist is deactivated after 5 minutes
● ignition is switched off
● driver's exit is detected
Hill start assist or extended hill start
assist can be selected in the vehicle
personalisation 3 123.
Note
Automatic transmission only: hill
start assist and extended hill start
assist will not be activated in neutral
gear. If neutral gear is selected
during an active hold, assists will
deactivate and vehicle may start
moving.
Driving and operating195If equipped only with front camera the
active emergency braking operates in
forward gear above walking speed up to 80 km/h.
If equipped with radar sensor, active
emergency braking operates in
forward gear at all speeds above
walking speed. Only front pedestrian
protection is active up to 80 km/h.
Activation A precondition is that Forward
Collision System and Front
pedestrian detection are not
deactivated in the vehicle
personalisation menu 3 123.
Brake preparation system When approaching a vehicle ahead
or a pedestrian so quickly that a
collision is likely, the brake
preparation system slightly
pressurises the brakes. This reduces
the response time, when a manual or
automatic braking is requested.Emergency automatic braking
After activation of brake preparation
system and just before the imminent
collision, this function automatically
applies limited braking to reduce the
impact speed of the collision or
prohibit a crash.
If active emergency braking is
applied, a message appears in the Driver Information Center and a
chime sounds.
Depending on the situation, the
vehicle may automatically brake
moderately or hard. This front
automatic braking can only occur if a
vehicle ahead is detected, indicated by the vehicle ahead indicator A
3 190. On vehicles with front
pedestrian protection, front automatic
braking can also occur when a
pedestrian ahead is detected.
Below a speed of 40 km/h the system can apply full braking.
Emergency automatic braking may slow the vehicle to a complete stop to
try to avoid a potential crash. If this
happens, emergency automatic
braking may engage the electricparking brake to hold the vehicle at a
stop. To release press the electric
parking brake button or firmly press
the accelerator pedal.9 Warning
Emergency automatic braking is
an emergency crash preparation
feature and is not designed to
avoid crashes. Do not rely on the
system to brake the vehicle.
Emergency automatic braking will
not brake outside of its operating speed range and only responds to
detected vehicles and
pedestrians.
Forward looking brake assist
In addition to the brake preparation
system and emergency automatic
braking, the forward looking brake
assist function makes the brake assist more sensitive. Therefore, pressing
the brake pedal less strongly results
in immediate hard braking. This
function helps the driver brake
quicker and harder before the
imminent collision.