14In briefHazard warning flashers
Operated with the ¨ button.
Hazard warning flashers 3 98.
Horn
Press j.
Washer and wiper systems
Windscreen wiper7:offAUTO or K:interval wiping or
automatic wiping with
rain sensor1:slow2:fast
Windscreen wiper 3 76, Wiper
blade replacement 3 153.
76Instruments and controlsWindscreen wiper/washerWindscreen wiper7:offAUTO or K:interval wiping or
automatic wiping with
rain sensor1:slow2:fast
Do not use if the windscreen is frozen.
Switch off in car washes.
Adjustable wiper interval
Wiper lever in position AUTO or P.
Turn the adjuster wheel to adjust the
desired wipe interval:
short interval:turn adjuster
wheel upwardslong interval:turn adjuster
wheel downwards
Automatic wiping with rain sensor
Wiper lever in position AUTO or P.
The rain sensor detects the amount of water on the windscreen and
automatically regulates the frequency
of the windscreen wiper.
Automatic wiping will need to be
reselected whenever the ignition has
been switched off.
Adjustable sensitivity of the rain
sensor
Turn the adjuster wheel to adjust the
sensitivity:low sensitivity:turn adjuster
wheel upwardshigh sensitivity:turn adjuster
wheel downwards
The rain sensor is located on the
windscreen. Keep the sensor free
from dust, dirt and ice.
Windscreen washer
88Instruments and controlsIlluminates red when the engine is
running
Stop, switch off engine.Caution
Coolant temperature too high.
Check coolant level 3 148.
If there is sufficient coolant, consult a workshop.
The control indicator must be blue
before continuing driving.
Preheating
! illuminates yellow.
Preheating is activated. Only
activates when outside temperature
is low.
AdBlue Y illuminates yellow.
AdBlue level is low. Refill AdBlue as
soon as possible, to avoid prevention
of engine starts.
Illuminates together with control
indicator F to indicate a system
failure or as a warning that engine starting may not be possible after a
certain distance. Seek the assistance
of a workshop immediately.
A corresponding message appears in the Driver Information Centre (DIC)
3 90.
Adblue percentage remaining can
also be checked by pressing button
repeatedly on end of wiper lever. Trip
computer 3 93.
AdBlue 3 123.
Tyre pressure monitoring
system
w illuminates or flashes yellow.
Illuminates briefly when the ignition is
switched on.
Illuminates
Tyre pressure loss. Stop immediately
and check tyre pressure.
Control indicator w illuminates
together with C 3 86 and a
corresponding message appears inthe Driver Information Centre (DIC)
when a puncture or severely under- inflated tyre is detected.
Flashes
Fault in system. After a delay the
control indicator illuminates
continuously. Consult a workshop.
Control indicator w illuminates
together with A 3 86 and a
corresponding message appears in
the DIC when a tyre without a
pressure sensor is mounted (e.g.
spare wheel).
Tyre pressure monitoring system (TPMS) 3 166.
Engine oil pressure
I illuminates red.
Illuminates briefly when the ignition is
switched on.
Driving and operating119Notice
When the fast idle function is
activated, the stop-start system is
automatically deactivated.
Stop-start system 3 119.
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 (DIC)3 90.9 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
3 116.
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.
Resetting 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 3 116.
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 3 116.
Refuelling 3 141.
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 is released.
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 the
vehicle battery is sufficiently charged
for a restart.
Driving and operating137
The system consists of four ultrasonicparking sensors in the rear bumper.
Notice
Attached parts in the detection area
cause system malfunction.
Activation
When reverse gear is engaged, the
system switches itself on
automatically. Readiness for
operation is indicated by a brief
acoustic signal.
An obstacle is indicated by buzzers
and, depending on vehicle, is also
indicated in the Info-Display. The
interval between the buzzers
becomes shorter as the vehicle gets
closer to the obstacle. When the
distance is less than 30 cm, the
buzzer is continuous.
Notice
In versions with Info-Display
indication, the volume of the buzzer can be adjusted via the Infotainment system. Refer to Infotainment
system manual for further
information.
Deactivation
It is possible to deactivate or
temporarily deactivate the system.
Notice
In versions with Info-Display
indication, the function can be
deactivated via the Infotainment
system. Refer to Infotainment
system manual for further
information.
Temporary deactivation
Temporarily deactivate the system by
pressing r on the instrument panel
with the ignition on. LED illuminates in
the button when deactivated.
When reverse gear is selected no
acoustic signal will sound, indicating
deactivation.
The function is reactivated by
pressing r again or the next time
the ignition is switched on.
Permanent deactivation
Permanently deactivate the system
by pressing and holding r on the
instrument panel for approx.
3 seconds with the ignition on. Control
indicator in the button illuminates
continuously.
138Driving and operatingThe system is deactivated and will not
operate. When reverse gear is
selected no acoustic signal will
sound, indicating deactivation.
The function is reactivated by
pressing and holding r for approx.
3 seconds.
Fault
If the system detects an operating
fault, when selecting reverse gear a
continuous acoustic alarm will sound
for approx. 5 seconds, a
corresponding message appears in
the Driver Information Centre (DIC)
3 90 and F illuminates in the
instrument cluster 3 86. Consult a
workshop to have the cause of the
fault remedied.Caution
When reversing, the area should
be free from obstacles which could impact on the underside of the
vehicle.
Impact to the rear axle, which may
not be visible, could lead to
uncharacteristic changes in the
vehicle handling. In the event of
such an impact, consult a
workshop.
Vehicle messages 3 91.
Basic notes on parking assist system
9 Warning
Under certain circumstances,
various reflective surfaces on
objects or clothing as well as
external noise sources may cause the system to fail to detect
obstacles.
Special attention must be paid to
low obstacles which can damage
the lower part of the bumper.
Caution
Performance of the sensors can
be reduced when sensors are
covered, e.g. by ice or snow.
Performance of the parking assist
systems can be reduced due to
heavy loading.
Special conditions apply if there
are taller vehicles involved (e.g.
off-road vehicles, mini vans,
vans). Object identification in the
upper part of these vehicles
cannot be guaranteed.
Objects with a very small reflection
cross-section, e.g. objects of
narrow size or soft materials, may
not be detected by the system.
The parking assist system will not
avoid a collision with objects which are out of the detection range of
the sensors.
166Vehicle careTyre pressure monitoring
system
The Tyre Pressure Monitoring
System (TPMS) uses radio and
sensor technology to check tyre
pressure levels.Caution
Tyre pressure monitoring system
warns only about low tyre pressure condition and does not replace
regular tyre maintenance by the
driver.
All wheels must be equipped with pressure sensors and the tyres must
have the prescribed pressure.
Notice
In countries where the tyre pressure
monitoring system is legally
required, the use of wheels without
pressure sensors will invalidate the
vehicle type approval.
The TPMS sensors monitor the air
pressure in the tyres and transmit tyre pressure readings to a receiver
located in the vehicle.
Tyre pressure chart 3 198.
Low tyre pressure condition
A detected low tyre pressure
condition is indicated by illumination
of control indicator w 3 88 and a
corresponding message appears in
the DIC.
If w illuminates, stop as soon as
possible and inflate the tyres as
recommended 3 198.
After inflating, some driving may be
required to update the tyre pressure
values in the system. During this time
w may illuminate.
If
w illuminates at lower temperatures
and extinguishes after some driving,
this could be an indicator for
approaching a low tyre pressure
condition. Check tyre pressure of all
four tyres.
If the tyre pressure must be reduced
or increased, switch off ignition.
Only mount wheels with pressure
sensors, otherwise w flashes for
several seconds then illuminates
continuously together with control
indicator F 3 86 and a corresponding
message appears in the DIC.
A spare wheel or temporary spare
wheel is not equipped with pressure
sensors. TPMS is not operational for
these wheels. For the further three
wheels, TPMS remains operational.
Control indicator w and the
corresponding message appears at
each ignition cycle until the tyres are
inflated to the correct tyre pressure.
Driver Information Centre (DIC) 3 90.
Vehicle messages 3 91.
Vehicle care167PunctureA puncture or severely under-inflated
tyre is indicated by illumination of
control indicator w together with C
3 86 and a corresponding message
appears in the DIC. Stop vehicle and
switch off engine.
Tyre pressure 3 198, Tyre repair kit
3 169, Spare wheel 3 173, Wheel
changing 3 171.
Relearn function
After a puncture has been repaired
and the driver has inflated the tyres to
the correct tyre pressure, TPMS
needs to recalculate.
Tyre pressure 3 198, Tyre repair kit
3 169.
During driving, select the tyre
pressure menu in the DIC by pressing button on end of wiper lever. Press
and hold button for approx.
5 seconds to initialise recalculation. A
corresponding message appears in
the DIC.
Several minutes of driving at a speed above 25 mph may be required tocomplete the relearn process. The
system can only provide limited
information during this time.
If problems occur during the relearn
process, control indicator w remains
illuminated and a warning message is
displayed in the DIC.
Driver Information Centre (DIC) 3 90.
Vehicle messages 3 91.
General information The use of tyre chains or
commercially available liquid tyre
repair kits can impair the function of
the system. Factory-approved tyre
repair kits can be used.Tyre repair kit 3 169, Tyre chains
3 168.
External high-power radio equipment
could disrupt the tyre pressure
monitoring system.
Each time the tyres are replaced,
TPMS sensors must be dismounted
and serviced by a workshop.
Tread depth
Check tread depth at regular
intervals.
Tyres should be replaced for safety
reasons at a tread depth of 2-3 mm
(4 mm for winter tyres).
For safety reasons it is recommended
that the tread depth of the tyres on
one axle should not vary by more than 2 mm.