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Driving and operating151
A precondition is that forward collision
alert is not deactivated by pressing
button V.
Activation
Forward collision alert operates
automatically above 25 mph, if it is not deactivated by pressing button V,
see below.
Selecting the alert sensitivity
The alert sensitivity can be set to
near, medium or far.Press button V, the current setting is
shown on the Driver Information
Centre (DIC). Press button V again
to change the alert sensitivity.
Alerting the driver
A green illuminated vehicle ahead
control indicator A illuminates in the
instrument cluster when the system has detected a vehicle in the driving
path.
When the distance to a preceding
moving vehicle becomes too small or
when approaching another vehicle
too rapidly and a collision is imminent,
a red LED warning light is reflected
flashing in the windscreen in front of
the driver's view.
Simultaneously a warning chime
sounds. Depress the brake pedal, if it
is required by the situation.
Deactivation The system can be deactivated.
Press button V repeatedly until the
following message appears in the
DIC.
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152Driving and operating
General information
9Warning
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 onother objects.
In the following cases, forward
collision alert may not detect a vehicle ahead or sensor performance is
limited:
■ on winding roads
■ when weather limits visibility, such as 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 front camera in
the windscreen is used to detect the
distance of a vehicle directly ahead in the vehicle's path. 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 93 . Press
the MENU button on the turn signal
lever to select Vehicle Information
Menu X and turn the adjuster
wheel to choose following distance
indication page.
The minimum indicated distance is
0.5 seconds.
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Driving and operating153
If there is no vehicle ahead or the
vehicle ahead is out of range, two
dashes will be displayed: -.- s.
Parking assist
Rear parking assist9 Warning
It is the driver who bears full
responsibility for the parking
manoeuvre.
Always check the surrounding
area while reversing and using the rear parking assist system.
The rear parking assist makes
parking easier by measuring the
distance between the vehicle and
rear obstacles. It informs and warns
the driver by giving acoustic signals
and display indication.
The system has four ultrasonic
parking sensors in the rear bumper.
Activation
When reverse gear is engaged, the
system is ready to operate
automatically.
An illuminated LED in the parking
assist button r indicates that the
system is ready to operate.
Indication
The system warns the driver with
acoustic signals against potentially
hazardous obstacles behind the
vehicle in a distance range up to
1.5 metres. The interval between the
sounds becomes shorter as the
vehicle gets closer to that obstacle.
When the distance is less than
approx. 30 cm, the sound is
continuous.
Additionally, the distance to rear obstacles is displayed by changing
distance lines in the Driver
Information Centre (DIC) 3 93 or,
depending on the version, on the Colour-Info-Display 3 98.
The distance indication 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,
distance indication appears again.
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154Driving and operating
Deactivation
The system automatically switches
off when reverse gear is disengaged.
Manual deactivation is also possible
by pressing the parking assist button
r .
In both cases, the LED in the button
extinguishes.
Fault
In the event of a fault or if the system does not work temporarily, e.g.
because of high external noise level
or other interference factors, the LED
in the button flashes for
three seconds and then extinguishes.
Control indicator r illuminates in
the instrument cluster 3 90 or a
message is indicated in the Driver Information Centre.
Front-rear parking assist9 Warning
The driver bears full responsibility
for the parking manoeuvre.
Always check the surrounding
area when driving backwards or
forwards while using parking
assist system.
The front-rear parking assist
measures the distance between the vehicle and obstacles in front and
behind the vehicle. It informs and
warns the driver by giving acoustic
signals and display indication.
It uses two different acoustic warning
signals for the front and rear
monitoring areas, each with a
different tone frequency.
The system has four ultrasonic
parking sensors each in the rear and front bumper.
If the vehicle is equipped with
advanced parking assist, the system
has six ultrasonic parking sensors
each in both the rear and front
bumper.
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Driving and operating155
Vehicles with rear or front-rear
parking assist are equipped with
button r.
Vehicles with front-rear parking assist
and advanced parking assist are
recognisable by button D.
Advanced parking assist, see section
below.
Activation and deactivation
When reverse gear is engaged, the
front and rear parking assist is ready
to operate.
An illuminated LED in the parking
assist button r or D indicates that
the system is ready to operate.
The front parking assist can also be
activated at a speed up to 7 mph with
a brief press of the parking assist
button.
If the r or D button is switched on
once within an ignition cycle, the front parking assist is deactivated at a
speed above 7 mph. It will be
reactivated if vehicle speed has not
exceeded 16 mph beforehand. If vehicle speed has exceeded 16 mph
beforehand, front parking assist
remains deactivated when speed
drops below 7 mph.When the system is deactivated, the
LED in the button extinguishes and
Park Assist Off pops-up in the Driver
Information Centre (DIC).
The system is deactivated
automatically when vehicle speed
exceeds 16 mph.
Indication
The system warns the driver with acoustic signals against potentially
hazardous obstacles behind the
vehicle in a distance range up to
1.5 metres and in front up to
1.2 metres . Depending on which side
of the vehicle is closer to an obstacle, you will hear acoustic warning signals
in the vehicle on the respective side.
The interval between the sounds
becomes shorter as the vehicle gets closer to that obstacle. When the
distance is less than approx. 30 cm, the sound is continuous.
Additionally, the distance to rear and
front obstacles is displayed by
changing distance lines in the Driver
Information Centre (DIC) 3 93 or,
depending on the version, on the
Colour-Info-Display 3 98.
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156Driving and operating
The distance to rear and front
obstacles is displayed by changing
distance lines in the Driver
Information Centre (DIC) 3 93.
The distance indication 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,
distance indication appears again.The distance to obstacles is shown on the Colour-Info-Display by coloured
zones in front of or behind the vehicle
3 98.
Fault
In the event of a fault or if the system does not work temporarily, e.g.
because of high external noise level
or other interference factors, a
message pops-up in the DIC.
Vehicle messages 3 100.
Advanced parking assist9 Warning
The driver bears full responsibility
for accepting the parking slot
suggested by the system and the
parking manoeuvre.
Always check the surrounding
area in all directions when using
the advanced parking assist.
The advanced parking assist
measures a suitable parking slot
while passing, calculates the
trajectory and automatically steers
the vehicle into a parallel or
perpendicular parking slot.
Instructions are given in the Driver
Information Centre (DIC) 3 93 or,
depending on the version, on the
Colour-Info-Display 3 98, supported
by acoustic signals.
The driver must control acceleration,
braking and gear shifting, while
steering is done automatically.
Advanced parking assist can only be
activated when driving forwards.
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Driving and operating157
Advanced parking assist is always
combined with front-rear parking assist, see previous section. Both
systems use the same sensors in the front and rear bumper.
Button D and operation logic
Advanced parking assist and front-
rear parking assist both use the same
button for activation and deactivation:
A brief press of button D activates
or deactivates the parking assist.
A long press of button D (approx.
one second) activates or deactivates
the advanced parking assist, see
separate description below.
Button logic operates the systems by
pressing D as follows:
■ If only front-rear parking assist is active, a brief press deactivates
front-rear parking assist.
■ If only front-rear parking assist is active, a long press activates
advanced parking assist.
■ If only advanced parking assist is active and the system is in parking
slot searching mode, a brief press
activates front-rear parking assist.
■ If only advanced parking assist is active and the system is in park
guiding mode, a brief press
deactivates advanced parking
assist.
■ If only advanced parking assist is active, a long press deactivates
advanced parking assist.
■ If forward gear or neutral is selected, a brief press activates ordeactivates only front parking
assist.
■ If reverse gear is selected, a brief press activates or deactivates frontand rear parking assist.Activation
When searching for a parking slot, the
system is ready to operate with a long press of button D.
The system recognises and
memorises (10 metres for parallel
parking slots or six metres for
perpendicular parking slots) even in
the parking assist mode. A long press
of button D activates advanced
parking assist to start parking
manoeuvre.
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158Driving and operating
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 for
parallel parking and 2.5 metres for
perpendicular parking.
FunctionalityParking slot searching mode
Vehicles with indication in the Driver
Information Centre
Select parallel or perpendicular
parking slot in Driver Information
Centre (DIC) by pressing the
SET/CLR button.
When a slot is detected, a visual
feedback in the Driver Information
Centre (DIC) and an acoustic signal is given.
Vehicles with indication on the
Colour-Info-Display
Select parallel or perpendicular
parking slot by tapping the icon 6 or
7 on the Colour-Info-Display.