Page 137 of 217

Driving and operating135
Button logic operates the systems by
pressing 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, long press activates
advanced parking assist.
■ If only advanced parking assist is active, a brief press activates front-
rear parking assist.
■ If only advanced parking assist is active, 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.
Operation
When reverse gear is engaged, the
front and rear parking assist is ready to operate.An illuminated LED in the parking
assist button 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 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.
The system is deactivated
automatically when exceeding
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 obstacles
is shown in the Driver Information Centre 3 87 or, depending on the
version, on the Colour-Info-Display 3 91.
Page 138 of 217

136Driving and operating
In the Driver Information Centre, the
distance to a front and rear obstacle
is displayed by changing distance
lines.
In the Colour-Info-Display, distance is displayed by coloured zones in front
of or behind the vehicle.
The distance 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, distance
indication appears again.
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 3 seconds
and then extinguishes. Control
indicator r illuminates in the
instrument cluster 3 85 and a
message pops-up in the Driver
Information Centre.
Vehicle messages 3 93.Advanced parking assist9 Warning
It is the driver who bears full
responsibility for accepting the
parking slot suggested by the
system and the parking
manoeuvre.
Always check the sourrounding
area in all directions when using
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 by the Driver
Information Centre or the Colour-Info-
Display 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.
Page 139 of 217

Driving and operating137
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.
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 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, long press activates
advanced parking assist.
■ If only advanced parking assist is active, a brief press activates front-rear parking assist.
■ If only advanced parking assist is active, long press deactivates
advanced parking assist.
■ If forward gear or neutral is selected, a brief press activates or
deactivates only front parking
assist.
■ If reverse gear is selected, a brief press activates or deactivates front
and 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 6 metres for
perpendicular parking slots) even in
the parking assist mode. Long press
of button D activates advanced
parking assist to start parking
manoeuvre.
Page 140 of 217
138Driving 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.
Functionality
Illustrations show the indications in
Driver Information Centre and Colour-
Info-Display.Parking slot searching mode
Select parallel or perpendicular
parking slot on Driver Information
Centre by pressing the SET/CLR
button or on Colour-Info Display tap
icon 6 or 7.
When a slot is detected, a visual
feedback in the Driver Information
Centre or Colour-Info-Display and an
acoustic signal is given.
Page 141 of 217

Driving and operating139
If the driver does not stop the vehicle
within 10 metres for parallel parking
slots or 6 metres for perpendicular
parking slots after a parking slot is
proposed, the system starts to search
for another suitable parking slot.Parking guiding mode
The parking slot suggestion of the system is accepted when the vehicle
is stopped by the driver within
10 metres for parallel parking slots or
6 metres for perpendicular parking slots after the Stop message is given.
The system calculates the optimal
path into the parking slot.A brief vibration in the steering wheel
after engaging reverse gear indicates
that the steering is controlled by the
system. Then the vehicle is steered
into the slot automatically by giving
the driver detailed instructions for
braking, accelerating and gear
shifting. The driver must keep hands
away from the steering wheel.
Pay always attention on the sound of
the front-rear parking assist.
Continuous sound means that the
distance to an obstacle is less than approx. 30 cm.
If, for any reason, the driver must take over control of the steering, hold the
steering wheel only at the outer edge. Automatic steering is cancelled in thisevent.Display indication
The instructions in the display show:
■ general hints and warning messages
■ a hint when driving faster than 18 mph during parking slot
searching mode, or 5 mph in
guiding mode,■ the demand to stop the vehicle, when a parking slot is detected,
■ the direction of driving during the parking manoeuvre,
■ the demand to shift rearwards or forwards,
■ the demand to accelerate or brake,
■ for some of the instructions a progress bar is shown in the DriverInformation Centre,
■ the successful parking indicated by
a pop-up symbol and a chime,
■ the cancelling of a parking manoeuvre.
Page 142 of 217
140Driving and operating
Selecting of parallel or perpendicular
parking
When searching for a parking slot,
select parallel or perpendicular
parking slot by pressing SET/CLR
button on the turn signal lever.
If the system is equipped with Colour-
Info-Display, select the type of
parking slot by tapping the display
icon 6 or 7.
The display shows the type of parking
slot.
Changing the parking side
The system is configured to detect
parking slots by default on the
passenger side. To detect parking
slots on the driver side, switch on turn
indicator to the driver side for the
durance of the search.
As soon as the turn indicator is
switched off, the system searches for
parking slots on the passenger side
again.
Page 143 of 217

Driving and operating141
Display priorities
After activating the advanced parking assist, a message appears in the
Driver Information Centre or Colour-
Info-Display. 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, advanced
parking assist instructions appear
again and the parking manoeuvre can
be continued.
Deactivation
The system is deactivated by:
■ long press of button D,
■ parking manoeuvre successfully ended,
■ driving faster than 18 mph during parking slot search,
■ driving faster than 5 mph during parking guidance,
■ driver interference on steering wheel detected,■ exceeding number of maximumgear changes: 8 parking cycles
when parallel parking or 5 cycles
when perpendicular parking,
■ switching off the ignition.
Deactivation by the driver or by the
system during manoeuvring will be
indicated by Parking Deactivated in
the Driver Information Centre or
Colour-Info-Display. Additionally an acoustic signal sounds.
Fault
A message appears in the Driver
Information Centre when:
■ there is a fault in the system; control
indicator r illuminates in the
instrument cluster,
■ the driver did not successfully complete the parking manoeuvre,
■ the system is not operational,
■ any of the deactivation reasons described above apply.
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
deactivated. A long press of button
D will activate the system and
search for a new parking slot.
Page 144 of 217

142Driving and operating
Basic notes on parking assistsystems9 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 has to be paid to
low obstacles which can damage
the lower part of the bumper.
Caution
Performance of the system can be reduced when sensors are
covered, e.g. by ice or snow.
Performance of the parking assist
system can be reduced due to
heavy loading.
Special conditions apply if there
are taller vehicles in the vicinity
(e.g. off-road vehicles, mini vans,
vans). Object identification and
correct distance indication 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.
Parking assist systems do not
detect objects outside the
detection range.
Notice
It is possible that the sensor detects a non-existing object caused by
echo disturbance from external
acoustic noise or mechanical
misalignments (sporadic false
warnings might happen).
Make sure that the front license plate
is properly mounted (not bent and no gaps to the bumper on the left or
right side) and the sensors are well
in place.
Advanced parking assist system
may not respond to changes in the
available parking space after
initiating a parking manoeuvre. The
system may recognize an entry, a
gateway, a courtyard or even a
crossing as parking slot. After
selecting reverse gear the system
would start a parking manoeuvre.
Take care of the availability of the
suggested parking slot.
Surface irregularities, e.g. on
construction zones, are not detected
by the system. The driver accepts
responsibility.
Notice
If engaging a forward gear and
exceeding a certain speed, the rear
parking assist will be deactivated
when the rear carrier system is
extended.
If engaging reverse at first, the
parking assist will detect the rear
carrier system and provide a buzzing
sound. Press r or D briefly to
deactivate the parking assist.
Notice
After production, the system
requires a calibration. For optimal
parking guidance, a driving distance
of at least 6 miles, including a
number of bends, is required.