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Driving and operating175The 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 three ultrasonic
parking sensors in the rear bumper.
Activation
After the vehicle is switched on, the
rear parking assist is activated.
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
50 cm while a forward gear is
engaged, or up to 1.5 m while reverse gear is engaged.
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
obstacles is displayed by changing
distance lines in the Driver
Information Centre 3 82.
The distance indication can be
inhibited by vehicle messages with a
higher priority. After dismissing the
message, distance indication
appears again.Deactivation
Press parking assist button r to
deactivate, 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 3 seconds
and then extinguishes. A message is
indicated in the Driver Information
Centre.
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176Driving and operatingFront-rear parking 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.
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 in front bumper and three ultrasonic parking sensors in
the rear bumper.
Activation
The system is activated automatically
at a speed up to 11 km/h.An illuminated LED in the parking
assist button r indicates that the
system is ready to operate.
If r is switched off, the front parking
assist is deactivated until the vehicle
is switched on again.
If vehicle speed has exceeded
25 km/h beforehand, parking assist
will be reactivated when speed drops below 11 km/h.
When the system is deactivated, the
LED in the button extinguishes and
Park Assist off pops-up in the Driver
Information Centre.
Page 179 of 273

Driving and operating177Indication
The system warns the driver with
acoustic signals against potentially
hazardous obstacles in front of the
vehicle in a distance range up to
80 cm and against potentially
hazardous obstacles behind the
vehicle in a distance range up to
50 cm while a forward gear is
engaged, or up to 1.5 m while reverse
gear is engaged.
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 3 82 or,
depending on the version, on the Info Display 3 85.
The distance indication can be
inhibited by vehicle messages with a higher priority. After dismissing themessage distance indication appears again.
Deactivation
The system is deactivated
automatically when vehicle speed
exceeds 11 km/h.
Manual deactivation is also possible
by pressing the parking assist button
r .
When the system is deactivated
manually, the LED in the button
extinguishes and Park Assist off
pops-up in the Driver Information
Centre.
After a manual deactivation, the front- rear parking assist is activated again
if r is pressed or if reverse gear is
engaged.
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 Driver
Information Centre.
Vehicle messages 3 89.
Page 180 of 273

178Driving and operatingAdvanced parking assist9Warning
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 3 82 or,
depending on the version, on the Info Display 3 85, supported by acoustic
signals.
The driver must control acceleration, braking and gear shifting, while
steering is done automatically.Advanced parking assist is always
combined with front-rear parking assist. Both systems use the same
sensors in the front and rear bumper.
The system has six ultrasonic parking
sensors in the front bumper and five
ultrasonic parking sensors in the rear
bumper.
Activation of advanced parking assist Advanced parking assist can only be
activated when driving forwards.When searching for a parking slot, the system is ready to operate with a
short press of (.
The system recognises and
memorises 10 m for parallel parking
slots or 6 m for perpendicular parking
slots in the parking assist mode.
The system can only be activated at
a speed up to 30 km/h and the system
searches for a parking slot at a speed up to 30 km/h.
The maximum allowed parallel
distance between the vehicle and a
row of parked cars is 1.8 m for parallel
parking and 2.5 m for perpendicular
parking.
Page 181 of 273

Driving and operating179FunctionalityParking slot searching mode,
indication in the Info Display
Select parallel or perpendicular
parking slot by touching the
respective icon on the Info Display.
Select parking side by touching the respective icon on the Info Display.
When a slot is detected, a visual
feedback on the Info Display and an
acoustic signal is given.
If the driver does not stop the vehicle after a parking slot is proposed, the
system starts to search for another
suitable parking slot.
Park guiding mode
The parking slot suggestion of the
system is accepted when the vehicle is stopped by the driver within 10 m
for parallel parking slots or 6 m 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
Page 182 of 273

180Driving and operatingbraking, accelerating and gear
shifting. The driver must keep hands
away from the steering wheel.
Always pay attention to the sound of
the front-rear parking assist.
Continuous sound indicates 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 Info Display
show:
● General hints and warning messages.
● A hint when driving faster than 30 km/h during parking slot
searching 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 into reverse gear or drive mode.● The demand to stop or to driveslowly.
● For some of the instructions a progress bar is shown in the
Driver Information Centre.
● The successful completion of the
parking manoeuvre indicated by
a pop-up symbol and a chime.
● The cancelling of a parking manoeuvre.
Display priorities
Advanced parking assist indication in
the Info Display can be inhibited by
vehicle messages with a higher
priority. After approving the message, advanced parking assist instructions
appear again and the parking
manoeuvre can be continued.
Deactivation
The system is deactivated by:
● a short press of (
● parking manoeuvre successfully ended●driving faster than 30 km/h during
parking slot search without
braking despite message in the
Info Display
● driving faster than 8 km/h during parking guidance
● driver interference on steering wheel detected
● exceeding number of maximum gear changes: eight cycles when
parallel parking or five cycles
when perpendicular parking
● switching off the vehicle
Deactivation by the driver or by the
system during manoeuvring will be indicated by a message on the
display. Additionally, an acoustic
signal sounds.
Fault
A message appears when:
● There is a fault in the system.● The driver did not successfully complete the parking
manoeuvre.
● The system is not operational.
● Any of the deactivation reasons described above apply.
Page 183 of 273

Driving and operating181If an object is detected during parking
instructions, Stop is indicated on the
display. Removing the object will
resume the parking manoeuvre. If the
object is not removed, the system will be deactivated. A long press of ( will
activate the system and search for a new parking slot.
Basic notes on parking assist
systems9 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 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.
Note
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 may occur).
Make sure that the front number
plate is properly mounted, vertically
and horizontally centred and the
sensors are firmly in place. The
performance of the parking assist
could be reduced if the number plate is bent or a number plate holder is
used.
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 a parking slot. After
selecting reverse gear the system
will start a parking manoeuvre. Take care regarding the availability of the
suggested parking slot.
Low curbs and surface irregularities,
e.g. on construction zones, are not
detected by the system. The driver
accepts responsibility.
Page 184 of 273

182Driving and operatingNote
Each new vehicle requires a
calibration. For optimal parking
guidance, a driving distance of at
least 10 km, including a number of
bends, is required.
Side blind zone assistant The side blind zone assistant detects
and reports objects on either side of
the vehicle, within a specified "blind
zone". The system displays a visual
alert in each exterior mirror, when
detecting objects that may not be
visible in the interior and exterior
mirrors.
The radar distance sensors are
located in the rear bumper.9 Warning
Side blind zone assistant 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 lights.
When the system detects a vehicle in
the side blind zone while driving
forwards, either while passing a
vehicle or being passed, a yellow
warning symbol F will illuminate in
the relevant exterior mirror. If the
driver then activates the turn light, the warning symbol F starts flashing
yellow as a warning not to change
lanes.
When the vehicle is started, both
exterior mirror displays will briefly illuminate to indicate that the system
is operating.
The system can be activated or
deactivated in the Info Display.
Vehicle personalisation 3 91.
Side blind zone assistant will be
deactivated when Lane change alert
is deactivated. Deactivation is
indicated by a message in the Driver Information Centre.
Detection zones
The detection zones start at the rear bumper and extend approx. 3 m
rearwards and to the sides. The
height of the zone is approx. between 0.5 m and 2 m off the ground.
Side blind zone assistant is designed
to ignore stationary objects, e.g.
guardrails, posts, curbs, walls and
beams. Parked vehicles or oncoming
vehicles are not detected.