Driving and operating173adequate force. For maximum
force, e.g. parking with trailer or on
inclines, pull switch m twice.
The electric parking brake is
applied when control indicator m
illuminates 3 114.
The electric parking brake can always
be activated, even if the ignition is off.
Do not operate electric parking brake
system too often without engine
running, as this will discharge the
vehicle battery.
Before leaving the vehicle, check the electric parking brake status. Control
indicator m 3 114.
Releasing
Switch on ignition. Keep brake pedal
depressed and then push switch m.
Drive away function
Depressing clutch pedal (manual
transmission) or engaging drive gear
(automatic transmission) and then
depressing the accelerator pedal
releases the electric parking brake
automatically. This is not possible
when the switch is pulled at the same
time.
This function also helps driving away
on inclines.
Aggressive drive away may reduce
life time of wear parts.
Dynamic braking when vehicle is
moving
When the vehicle is moving and the
switch m is kept pulled, the electric
parking brake system will decelerate the vehicle, but will not apply
statically.
As soon as the switch m is released,
dynamic braking will be stopped.
Fault
Failure mode of electric parking brake
is indicated by control indicator j and
by a code number or a vehicle
message which is displayed in the
Driver Information Centre (DIC).
Vehicle messages 3 125.Apply electric parking brake: pull and
hold the switch m for more than
5 seconds. If control indicator m
illuminates, electric parking brake is
applied.
Release electric parking brake: push and hold the switch m for more than
2 seconds. If control indicator m
extinguishes, electric parking brake is released.
Control indicator m flashes: electric
parking brake is not fully applied or released. When continuously
flashing, release electric parking
brake and retry applying.
Brake assist
If the brake pedal is depressed
quickly and forcefully, maximum
brake force is automatically applied
(full braking).
Maintain steady pressure on the
brake pedal for as long as full braking
is required. Maximum brake force is
automatically reduced when the
brake pedal is released.
Driving and operating195Parking assistRear parking assist9 Warning
The driver 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.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. 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 may be shown in the Driver
Information Centre (DIC).
Deactivation
The system automatically switches
off when reverse gear is disengaged.
To switch on the system again,
engage reverse gear.
Manual deactivation is also possible by pressing r.
196Driving and operating
When the system is deactivated, the
LED in the button extinguishes.
Additionally, Park Assist Off pops-up
in the DIC when the system is
deactivated manually.
Fault
In the event of a fault in the system or if the system does not work due to
temporary conditions, e.g. ice
covered sensors, control indicator
r illuminates or a message is
displayed in the DIC.
Vehicle messages 3 125.
Control indicator r 3 115.
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. 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. The signal
for front obstacles sounds via the
front speakers, for rear obstacles it
sounds from the rear of the vehicle.Parking assist button and operation
logic
Front-rear parking assist is equipped
with button r. If the vehicle is
additionally equipped with advanced parking assist (see the following
separate description) the system is
equipped with button D. In this
case, both systems will be operated
by D .
Short press of r or D deactivates
or activates the front parking assist.
Long press of D (approx.
one second) activates or deactivates the advanced parking assist.
Driving and operating197
Button logic operates the systems by
pressing as following:
■ Front-rear parking assist is active: short press deactivates front-rear
parking assist.
■ Front-rear parking assist is active: long press activates advanced
parking assist if a forward gear is engaged.
■ Advanced parking assist is active: short press activates front-rear
parking assist.
■ Advanced parking assist is active: long press deactivates advanced
parking assist.
■ Advanced parking assist and front- rear parking assist are active: shortpress deactivates both systems.
Activation
When reverse gear is engaged, the
front and rear parking assist is ready
to operate.
The front parking assist is also
activated automatically at a speed up to 7 mph.An illuminated LED in the parking
assist button r or D indicates that
the system is ready to operate.
If the vehicle exceeds a speed of
7 mph, the front parking assist is
deactivated. The front parking assist
is always reactivated when vehicle
speed drops below 7 mph.
Indication
The system warns the driver with
acoustic signals against potentially
hazardous obstacles behind and in
front of the vehicle. Depending on
which side of the vehicle is closer to
an obstacle, you will hear acoustic warning signals on the respective
side of the vehicle. 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
may be shown in the DIC 3 118.
The distance to a front and rear
obstacle is indicated by changing
distance lines around the vehicle.
Rear obstacles are indicated
acoustically and visually at the same time.
Front obstacles are indicated visually
first. At distances less than 80 cm an
acoustic signal also sounds.
The distance indication in the DIC 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.
198Driving and operating
Deactivation
The rear parking assist automatically
switches off when reverse gear is
disengaged.
The front parking assist is deactivated
automatically at a speed above
7 mph.
Manual deactivation is possible by
pressing r or D briefly.
When the system is deactivated, the
LED in the button extinguishes.
Additionally, Park Assist Off pops-up
in the DIC when the system is
deactivated manually.
After a manual deactivation, the front
parking assist is activated again if
r or D is pressed or if reverse
gear is engaged.
Fault In the event of a fault in the system orif the system does not work due to
temporary conditions, e.g. ice
covered sensors, control indicator
r illuminates or a message is
displayed in the DIC.
Vehicle messages 3 125.
Control indicator r 3 115.
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
advanced parking assist.
The advanced parking assist system manoeuvres the driver into a parkingslot by giving instructions in the DIC
and acoustic signals. The driver must
control acceleration, braking, steering and gear shifting.
The system uses the sensors of the
front-rear parking assist in
combination with two additional
sensors on both sides of the front and rear bumper.
Driving and operating199
Button D and operation logic
Advanced parking assist and front-
rear parking assist (see previous
description) are both operated by
pressing D.
Short press of D deactivates or
activates the front parking assist.
Long press of D (approx.
one second) activates or deactivates the advanced parking assist.
Button logic operates the systems by
pressing as following:
■ Front-rear parking assist is active: short press deactivates front-rear
parking assist.
■ Front-rear parking assist is active: long press activates advanced
parking assist if a forward gear is engaged.
■ Advanced parking assist is active: short press activates front-rear
parking assist.■ Advanced parking assist is active: long press deactivates advanced
parking assist.
■ Advanced parking assist and front- rear parking assist are active: shortpress deactivates both systems.
Activation
When searching for a parking slot, the
system must be activated by pressing D for approx. one second.
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 searching for a suitable
parking slot. When a suitable slot is
detected, a visual feedback in the DIC
and an acoustic signal are given.
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.
200Driving and operating
The parking slot suggestion of the
system is accepted when the vehicle is stopped by the driver within
10 metres after the "Stop" 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.A successful parking manoeuvre is
indicated by the 'End position'
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 by default on the
passenger side. To detect parking
slots on the driver side, switch on turn
indicator to the driver side for the
duration of searching.
Driving and operating201
As soon as turn indicator is switched
off, the system searches for parking
slots on the passenger side again.
Display priorities
After activating the advanced parking assist, a message appears in the DIC.
Advanced parking assist indication in
the DIC 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:
■ short press of D if advanced
parking assist and front-rear
parking assist are activated
■ long press of D if advanced
parking assist is activated
■ parking manoeuvre successfully ended
■ driving faster than 18 mph
■ switching off the ignitionDeactivation by the driver or by the system during manoeuvring will beindicated by Parking Deactivated in
the DIC.
Fault A message appears in the DIC 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
DIC. Removing the object will resume the parking manoeuvre. If the object
is not removed, the system will be
deactivated. Press D for approx.
one second to 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