Climate control155Basic settingsSome settings can be changed in theSettings menu in the Info-Display.Vehicle personalisation 3 125.
Auxiliary heater Air heater Quickheat is an electric auxiliary airheater which automatically warms up
the passenger compartment more
quickly.Air vents
Adjustable air vents
At least one air vent must be open
while cooling is on.
To open the vent, turn the adjuster
wheel towards the bigger W symbol.
Adjust the air amount at the vent
outlet by turning the adjuster wheel.
Direct the flow of air by tilting and
swivelling the slats.
To close the vent, turn the adjuster
wheel towards the smaller W symbol.
9 Warning
Do not attach any objects to the
slats of the air vents. Risk of
damage and injury in case of an
accident.
Fixed air vents
Additional air vents are located
beneath the windscreen and door windows and in the foot wells.
Driving and operating157Driving and
operatingDriving hints ............................... 158
Control of the vehicle ...............158
Steering ................................... 158
Starting and operating ...............158
New vehicle running-in ............158
Ignition switch positions ...........158
Power button ........................... 159
Retained power off ..................160
Starting the engine ..................161
Overrun cut-off ........................ 163
Stop-start system ....................163
Parking .................................... 166
Engine exhaust .......................... 168
Diesel particle filter ..................168
Catalytic converter ...................169
Automatic transmission ..............169
Transmission display ...............169
Selector lever .......................... 170
Manual mode ........................... 171
Electronic driving programmes 171
Fault ........................................ 171
Interruption of power supply ....172
Manual transmission ..................173Manual transmission automa‐
ted .............................................. 173
Transmission display ...............174
Selector lever .......................... 174
Manual mode ........................... 175
Electronic driving programmes 176
Fault ........................................ 176
Brakes ........................................ 176
Antilock brake system .............176
Parking brake .......................... 177
Brake assist ............................. 179
Hill start assist ......................... 179
Ride control systems .................179
Traction Control system ..........179
Electronic Stability Control ......180
Sport mode .............................. 182
Driver assistance systems .........182
Cruise control .......................... 182
Speed limiter ........................... 184
Adaptive cruise control ............186
Forward collision alert .............193
Following distance indication ...196
Active emergency braking .......197
Parking assist .......................... 200
Side blind spot alert .................207
Rear view camera ...................209
Traffic sign assistant ................211
Lane keep assist .....................215Fuel............................................ 217
Fuel for petrol engines .............217
Fuel for diesel engines ............218
Fuel for natural gas operation . 219
Refuelling ................................ 219
Fuel consumption - CO 2-
Emissions ............................... 221
Trailer hitch ................................ 222
General information .................222
Driving characteristics and towing tips .............................. 222
Trailer towing ........................... 223
Towing equipment ...................223
Trailer stability assist ...............226
160Driving and operatingfunctions remain active until driver's
door is opened, provided the ignition
was on previously.Emergency shut off during driving
Press Engine Start/Stop for longer
than two seconds or press twice
briefly within five seconds 3 161.
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.
Place the electronic key solely
centred in the transmitter area in
longitudinal direction flat with buttons
upside as shown in the illustration.
Other objects, e.g. other keys,
transponder, tags, coins etc. must be removed from the centre console.
Depress the clutch pedal (manual
transmission) or the brake pedal
(automatic transmission or manual
transmission automated) and press
Engine Start/Stop .
To switch off the engine, press
Engine Start/Stop again. Remove the
electronic key from the centre
console.
This option is intended for
emergencies only. Replace the
electronic key battery as soon as
possible 3 22.
For unlocking or locking the doors,
see fault in radio remote control unit
or electronic key system 3 24.
Retained power off
The following electronic systems can
work until the driver's door is opened
or for ten minutes after the ignition is
switched off:
● power windows
● sunroof
● power outlets
166Driving and operatingNote
If a trailer or a bike carrier is
attached, early Autostop and late
restart is deactivated.
Parking9 Warning
● Do not park the vehicle on an
easily ignitable surface. The
high temperature of the
exhaust system could ignite the
surface.
● Always apply the parking brake. Activate the manual
parking brake without pressing the release button. Apply as
firmly as possible on a downhill slope or uphill slope. Depress
brake pedal at the same time to
reduce operating force.
For vehicles with electric
parking brake, pull switch m for
a minimum of one second until
control indicator m illuminates
constantly and electric parking
brake is applied 3 111.
● Switch off the engine.
● If the vehicle is on a level surface or uphill slope, engage
first gear or set the selector
lever to position P before
removing the ignition key or
switching off ignition on
vehicles with power button. On
an uphill slope, turn the front
wheels away from the kerb.
If the vehicle is on a downhill
slope, engage reverse gear or
set the selector lever to position
P before removing the ignition
key or switching off ignition on
vehicles with power button.
Turn the front wheels towards
the kerb.
● Close the windows and the sunroof.
● Remove the ignition key from the ignition switch or switch off
ignition on vehicles with power
button. Turn the steering wheel until the steering wheel lock is
felt to engage.For vehicles with automatic
transmission, the key can only
be removed when the selector
lever is in position P.
For vehicles with manual
transmission automated, the key can only be removed from
the ignition switch when the
parking brake is applied.
● Lock the vehicle.
● Activate the anti-theft alarm system.
● The engine cooling fans may run
after the engine has been
switched off 3 229.
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.
Driving and operating169Caution
If possible, do not interrupt
cleaning process. Drive until
cleaning is completed to avoid the need for service or repair by a
workshop.
Cleaning process not possible
If cleaning is not possible for anyreasons, control indicator Z
illuminates and a warning message
appears in the Driver Information
Centre. Engine power may be
reduced. Seek the assistance of a
workshop immediately.
Catalytic converter
The catalytic converter reduces the
amount of harmful substances in the
exhaust gases.
Caution
Fuel grades other than those listed on pages 3 217, 3 285 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.
Automatic transmission
The automatic transmission permits
automatic gearshifting (automatic
mode) or manual gearshifting
(manual mode).
Manual shifting is possible in manual mode by tapping the selector lever to
+ or - 3 171.
Transmission display
The mode or selected gear is shown
in the Driver Information Centre.
In automatic mode, the driving
programme is indicated by D.
Driving and operating171ParkingApply the parking brake and engage
P .
The ignition key can only be removed
when the selector lever is in position
P .
Manual mode
Move selector lever out of position D
towards the left in position M.
Tap selector lever upwards + to shift
to a higher gear.
Tap the selector lever downwards - to
shift to a lower gear.
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.
Gear shift indication
The symbol R or S with a number
beside it is indicated when
gearshifting is recommended for fuel
saving reasons.
Shift indication appears only in
manual mode.
Electronic driving programmes
● Following a cold start, the operating temperature
programme increases engine
speed to quickly bring the
catalytic converter to the required
temperature.● Special programmes automatically adapt the shifting
points 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 select
manually 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 selected driving
mode. The transmission shifts to a
lower gear depending on engine
speed.
Fault
In the event of a fault a message is
displayed in the Driver Information
Centre. Vehicle messages 3 123.
Electronic transmission control
enables only fourth gear. The
transmission no longer shifts
automatically.
176Driving and operatingShift indication appears only in
manual mode.
Electronic driving programmes
● Following a cold start, the operating temperature
programme increases engine
speed to quickly bring the
catalytic converter to the required
temperature.
● The adaptive programme tailors gearshifting to the driving
conditions, e.g. greater load or
gradients.
Kickdown If the accelerator pedal is pressed
down completely in automatic mode,
the transmission shifts to a lower gear
depending on engine speed.
Fault
To prevent damage to the manual
transmission automated, the clutch is
engaged automatically at high clutch
temperatures.In the event of a fault, a warning
message is displayed in the Driver
Information Centre. Vehicle
messages 3 123.
Continued driving is restricted or not
possible, depending on the fault.
Have the cause of the fault remedied
by a workshop.Brakes
The brake system comprises two
independent brake circuits.
If a brake circuit fails, the vehicle can
still be braked using the other brake
circuit. However, braking effect is
achieved only when the brake pedal
is depressed firmly. Considerably
more force is needed for this. The
braking distance is extended. Seek the assistance of a workshop before
continuing the journey.
When the engine is not running, the
support of the brake servo unit
disappears once the brake pedal has been depressed once or twice.
Braking effect is not reduced, but
braking requires significantly greater
force. It is especially important to bear this in mind when being towed.
Control indicator R 3 111.
Antilock brake system Antilock brake system (ABS)
prevents the wheels from locking.
Driving and operating191Switching off
Press C to switch off adaptive cruise
control. C in the Driver Information
Centre extinguishes. The stored
speed is deleted.
Switching off the ignition also
switches off adaptive cruise control
and deletes the stored speed.
Driver's attention ● Use adaptive cruise control carefully on bends or mountainroads, as it can lose the vehicle
ahead and needs time to detect it again.
● Do not use the system on slippery roads as it can create
rapid changes in tyre traction
(wheel spinning), so that you
could lose control of the vehicle.
● Do not use adaptive cruise control during rain, snow or
heavy dirt, as the radar sensor
can be covered by a water film,
dust, ice or snow. This reduces or suppresses completely thevisibility. In case of sensor
blockage, clean the sensor
cover.
System limits ● The system's automatic brake force does not permit hard
braking and the braking level
may not be sufficient to avoid a
collision.
● After a sudden lane change, the system needs a certain time to
detect the next preceding
vehicle. So if a new vehicle is
detected, the system may
accelerate instead of braking.
● Adaptive cruise control does ignore the oncoming traffic.
● Adaptive cruise control does not consider pedestrians and
animals for braking and driving off.
● Adaptive cruise control considers
stopped vehicles only at low
speed.● Do not use adaptive cruise control when towing a trailer.
● Do not use adaptive cruise control on roads with an incline ofmore than 10%.
Bends
The adaptive cruise control calculates
a predicted path based on the
centrifugal force. This predicted path
considers the current bend
characteristic, but cannot consider a
future bend change. The system may lose the current vehicle ahead or
consider a vehicle which is not in the
actual lane. This can happen when
entering or exiting a bend or if the
bend gets stronger or weaker. If it no
longer detects any vehicle ahead,
then control indicator A will
extinguish.