184Driving and operating
Press button E, the current setting is
shown in the Driver Information
Centre. Press button E again to
change the alert sensitivity. The
setting is also displayed in the Driver
Information Centre.Note that the alert timing sensitivity
setting is shared with the following
distance setting of the adaptive cruise
control 3 175. So changing the alert
timing sensitivity changes the
adaptive cruise control following
distance setting.
Alerting the driver
A green illuminated vehicle ahead
control indicator A lights up in the
instrument cluster when the system has detected a vehicle in the driving
path. The control indicator A
changes to yellow when the distance
to a preceding moving vehicle gets
too small or when approaching
another vehicle too rapidly.
Simultaneously the collision alert
symbol pops up in the Driver
Information Centre.
If a collision is imminent a warning
chime sounds. Depress the brake
pedal, if it is required by the situation.
Settings
Settings can be changed in the
vehicle personalisation menu in the
Colour-Info-Display.
Select the relevant setting in Settings,
I Vehicle in the Colour-Info-Display.
Colour-Info-Display 3 117.
Vehicle personalisation 3 121.
186Driving and operating
General information for bothvariants of forward collision alert9 Warning
Forward collision alert is just a
warning system and does not
apply the brakes. When
approaching a vehicle ahead too
rapidly, it may not provide you
enough time to avoid a collision.
The driver accepts full
responsibility for the appropriate
following distance based on traffic, weather and visibility conditions.
The complete attention of the
driver is always required while
driving. The driver must always be
ready to take action and apply the
brakes.
System limitations
The system is designed to warn only for vehicles, but may react also to
other metallic objects.
In the following cases, forward
collision alert may not detect a vehicle ahead or sensor performance may be limited:
■ on winding roads,
■ when weather limits visibility, e.g. fog, rain, or snow,
■ when the sensor is blocked by snow, ice, slush, mud, dirt, or
windscreen damage.
Following distance
indication
The following distance indication
displays the distance to a preceding
moving vehicle. The system uses,
depending on the vehicle equipment,
either the radar behind the radiator
grille or the front camera in the
windscreen to detect the distance of
a vehicle directly ahead in your lane.
It is active at speeds above 25 mph.
When a preceding vehicle is detected
ahead, the distance is indicated in
seconds, displayed on a page in the
Driver Information Centre 3 110.On Baselevel display set Settings
X with the Menu button and select
Following distance indication via the
adjuster wheel on the turn signal lever 3 110.
On Midlevel or Uplevel display, select
Info menu and press o to select
Following distance indication 3 110.
The minimum indicated distance is
0.5 seconds.
If there is no vehicle ahead or the vehicle ahead is out of range, two
dashes will be displayed: -.- s.
188Driving and operatingspeed before a collision. It may not
react for stopped vehicles,
pedestrians or animals. After a
sudden lane change, the system
needs a certain time to detect the
next preceding vehicle.
The complete attention of the
driver is always required while
driving. The driver shall always be ready to take action and apply the brakes and steer to avoid
collisions. The system is designed
to work with all occupants wearing their seat belts.
System limitations
The active emergency braking has
limited or no function during rain,
snow or heavy dirt, as the radar
sensor can be covered by a water
film, dust, ice or snow. In case of
sensor blockage, clean the sensor
cover.
In some cases, the active emergency braking system may provide an
automatic braking in situations that
seem to be unnecessary, for instance
in parking garages, due to traffic signs
in a curve or due to vehicles in
another lane. This is normal
operation, the vehicle does not need
service. Firmly apply the accelerator
pedal to override the automatic
braking.
Settings Settings can be changed in the
vehicle personalisation menu in the
Colour-Info-Display.
Select the relevant setting in Settings,
I Vehicle in the Colour-Info-Display.
Colour-Info-Display 3 117.
Vehicle personalisation 3 121.
Fault
In the event of a system service
requirement, a message is displayed
in the Driver Information Centre.
If the system does not work as it
should do, vehicle messages are
displayed in the Driver Information
Centre.
Vehicle messages 3 119.
Driving and operating189Parking assist9Warning
The driver bears full responsibility
for the parking manoeuvre.
Always check the surrounding
area when driving backwards or
forwards while using parking
assist system.
Front-rear parking assist
The front-rear parking assist
measures the distance between the vehicle and obstacles in front and
behind the vehicle. The system gives acoustic signals and display
messages.
The system has four ultrasonic
parking sensors each in the rear and front bumper.
It uses two different acoustic warning
signals for the front and rear
monitoring areas, each with a
different tone frequency.
Activation
When reverse gear is engaged, the
front and rear parking assist is ready
to operate.
An illuminated LED in the parking
assist button r indicates that the
system is ready to operate.
When driving forward at low speeds,
the front parking assist can also be
activated by pressing the parking
assist button r.
Once the button r is pressed within
an ignition cycle, the front parking
assist is always reactivated when the vehicle underruns a certain value.
Indication
The system warns the driver with
acoustic signals against potentially
hazardous obstacles in front of or
behind the vehicle. An obstacle
detection is indicated by beeps
sounding respective from the front or
rear of the vehicle. The intervall
between the beeps becomes shorter
as the vehicle gets closer to the
obstacle. when the distance is less
than 30 cm, a continuous tone
sounds.
190Driving and operating
The distance to a front and rear
obstacle is indicated by changing
distance lines around the vehicle.
The parking assist page in the display
can be hidden by vehicle messages
with a higher priority. If the parking
assist page is overwritten by a vehicle message, distance is no longer
indicated until parking assist is
activated again.
Deactivation
Deactivate the system by pressing
the r button.
The LED in the button will extinguish
and Park Assist Off will be displayed
in the Driver Information Centre.
The system is automatically disabled
above a certain speed.
Fault
In the event of a fault in the system,
or if the system does not work due to
temporary conditions, e.g. snow
covered sensors, r illuminates or a
message is displayed in the Driver
Information Centre.
Vehicle messages 3 119.
Advanced parking assistThe advanced parking assist system
manoeuvres the driver into a parking slot by giving instructions in the Driver Information Centre and acoustic
signals.
The system uses the sensors of the
parking assist system in combination
with two additional sensors on both
sides of the front and rear bumper.
Activation
When looking for a parking slot, the
system must be activated by pressing
the ( button.
Driving and operating191
The system can only be activated at
a speed up to 18 mph and the system searches for a parking slot at a speed
up to 18 mph.
The maximum allowed parallel
distance between the vehicle and a
row of parked cars is 1.8 metres.
Functionality
When the vehicle passes a row of
cars and the system is activated, the
advanced parking assist system
begins looking for a suitable parking
slot. When a suitable slot is detected,
a visual feedback and acoustic
signals are given in the Driver
Information Centre.
If the driver does not stop the vehicle
within 10 metres after a parking slot is
proposed, the system starts to search for another suitable parking slot.
The suggestion of the system is
accepted when the vehicle is stopped
by the driver within 10 metres after the message is given. The system
calculates the optimal route into the
parking slot. Then it manoeuvres the
driver into the slot by giving detailed
instructions.
The instructions in the display show:
■ a hint when driving faster than 18 mph,
■ the demand to stop the vehicle, when a parking slot is detected,
■ the direction of driving during the parking manoeuvre,
■ the steering wheel position during parking,
■ for some of the instructions a progress bar is shown.
192Driving and operating
A successful parking manoeuvre is
indicated by a confirmation symbol.
Always pay attention to the sound of
the front-rear parking assist.
Continuous sound means that the
distance to an obstacle is less than approx. 30 cm.
Changing the parking side
The system is configured to detect
parking slots on the passenger side.
To detect parking slots on the driver
side, press button ( for approx.
2 seconds.
Display priorities
After activating the advanced parking assist, a message appears in the
Driver Information Centre. Advanced
parking assist indication in the Driver
Information Centre can be inhibited
by vehicle messages with a higher
priority. After approving the message
by pressing the SET/CLR button on
the turn signal lever or the 9 button
in the steering wheel controls,
advanced parking assist instructions
appear again and the parking
manoeuvre can be continued.
Deactivation
The system is deactivated by:
■ pressing the ( button
■ parking manoeuvre successfully ended
■ driving faster than 18 mph
■ switching off the ignition
Deactivation by the driver or by the system during manoeuvring will beindicated by Parking Deactivated in
the Driver Information Centre.Fault
A message appears in the Driver
Information Centre when:
■ there is a fault in the system
■ the driver did not successfully complete the parking manoeuvre
■ the system is not operational
If an object is detected during parking instructions, Stop is indicated in the
Driver Information Centre. Removing
the object will resume the parking
manoeuvre. If the object is not
removed, the system will be
194Driving and operating9Warning
Side blind spot alert does not
replace driver vision.
The system does not detect: ■ Vehicles outside the side blind zones which may be rapidly
approaching.
■ Pedestrians, cyclists or animals.
Before changing a lane, always
check all mirrors, look over the
shoulder and use the turn signal.
When the system detects a vehicle in the side blind zone while driving
forward, either while passing a
vehicle or being passed, the amber
warning symbol B will illuminate in
the relevant exterior mirror. If the
driver then activates the turn signal,
the warning symbol B starts flashing
amber as a warning not to change
lanes.
When the vehicle is started, both
exterior mirror displays will briefly
come on to indicate that the system is
operating.
If the vehicle is equipped with lane change alert 3 195, the symbol F
is displayed in the mirrors.The system can be activated or
deactivated in the vehicle
personalisation.
Select the relevant setting in Settings,
I Vehicle in the Colour-Info-Display.
Colour-Info-Display 3 117.
Vehicle personalisation 3 121.
Deactivation is indicated by a
message in the Driver Information
Centre (DIC).
Detection zones
The system sensor covers a zone of
approx. 3.5 metres on both sides of
the vehicle. This zone starts at each