180Driving and operatingThe 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.
Releasing
Switch on ignition. Keep foot brake
pedal depressed and then push
switch m.
Drive away function
Vehicles with manual transmission:
Depressing the clutch pedal and then
slightly releasing the clutch pedal and slightly depressing the accelerator
pedal releases the electric parking
brake automatically. This is not
possible when switch m is pulled at
the same time.
Vehicles with automatic transmission: Engaging D and then depressing the
accelerator pedal releases the
electric parking brake automatically.
This is not possible when switch m is
pulled at the same time.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.
Automatic applying
If the vehicle is equipped with
automatic transmission and adaptive
cruise control is active, electric
parking brake is applied automatically
when vehicle is stopped by the
system for more than two minutes.
Parking brake releases automatically
after moving off.
Functionality check
When the vehicle is not moving, the
electric parking brake might be
applied automatically. This is done to
check the system.Fault
Failure mode of electric parking brake is indicated by a control indicator j
and by a vehicle message which is
displayed in the Driver Information
Centre. Vehicle messages 3 123.
Apply electric parking brake: pull and
hold the switch m for more than
five seconds. If control indicator m
illuminates, electric parking brake is
applied.
Release electric parking brake: push and hold the switch m for more than
two 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 brake pedal is depressed quickly
and forcefully, maximum brake force
is automatically applied.
Driving and operating185If, for example, normal settings are
active in AUTO mode and DMC
detects a sporty driving behaviour, it
automatically changes systems into
sporty settings unless the driver
deselects sporty damping or steering
in the Sport Mode Customisation .
If, for another example, comfort
settings are active in TOUR mode
and whilst driving on a winding road a
sudden hard brake is necessary,
DMC will detect the dynamic vehicle
condition and changes the settings
for suspension back to normal
(default) setting to enhance vehicle
stability.
When the driving characteristic or the dynamic vehicle state returns to the
former state, DMC will change to
preselected settings.Flex Ride visualisation menu
On 8" Info Display a Flex Ride
visualisation menu can be displayed
by touching ê on the screen. On this
page the selected drive mode and
active setup are displayed.
System settings are highlighted in red for sport, blue for comfort and yellowfor normal.
Additionally the personalisation of
adaptive AUTO mode sensitivity as
well as the personalisation of Sport
mode functions can be displayed in
the visualisation menu by selecting
the respective button on the Info
display.
Personalisation of AUTO mode
sensitivity
The driver can change the sensitivity
of adaptive AUTO mode in three
steps via the Flex Ride visualisation
menu.
● Normal: default setting.
● Sport sensitive: systems change to sport settings faster while
driving sporty.
● Comfort sensitive: systems change to comfort settings faster
while cruising.
Additionally any drive mode control adaption can be deactivated.
Flex Ride visualisation menu will be
displayed by touching ê on the 8"
Info display.
Select Auto-Mode Customisation and
change the relevant settings.
The settings can also be changed in
the personalisation menu in the Info
display, I Settings 3 125.
Info display 3 119.
190Driving and operatingAdaptive cruise control automatically
decelerates the vehicle when
approaching a slower moving vehicle. It then adjusts the vehicle speed to
follow the vehicle ahead at the
selected following distance. The
vehicle speed increases or decreases
to follow the vehicle in front, but will
not exceed the set speed. It may
apply limited braking with activated
brake lights.
To facilitate overtaking a vehicle on
the motorway, the activation of the
turn signal reduces the following
distance for a short time. This function is implemented only on the respective
driver's side depending on left or right
hand drive vehicle configuration.
The adaptive cruise control can store set speed over 19 mph for manual
transmission. On vehicles with
automatic transmissions the system can brake until a full stop and drive off
from a stop.
Adaptive cruise control uses radar
and camera sensors to detect the
vehicles ahead. If no vehicle is
detected in the driving path, the
adaptive cruise control will behave
like a conventional cruise control.
Adaptive cruise control is mainly
advised to be used on long straight
roads like highways or country roads
with steady traffic. Do not use the
system if it is not advisable to
maintain a constant speed.
Control indicator A 3 111, C 3 111.
9 Warning
The complete driver attention is
always required while driving with adaptive cruise control. The driver
stays fully in control of the vehicle
because the brake pedal, the
accelerator pedal and the cancel
switch have priority over any
adaptive cruise control operation.
Switching on
Illustrations show different versions.
196Driving and operating● Do not use adaptive cruisecontrol when towing a trailer.
● Do not use adaptive cruise control on roads with an incline of
more than 10%.
Bends
The adaptive cruise control calculates
a predicted path based on the
centrifugal force. This predicted path
considers the current bend
characteristic, but cannot consider a
future bend change. The system may lose the current vehicle ahead or
consider a vehicle which is not in the
actual lane. This can happen when
entering or exiting a bend or if the
bend gets stronger or weaker. The
camera applies a certain correction
based on the detectable lane
markings. The control indicator A will
extinguish, if a vehicle ahead is no longer detected.
If the centrifugal force is too high in a
bend, the system slows down the
vehicle slightly. This braking level is
not designed to avoid spinning-off the
bend. The driver is responsible for
reducing the selected speed before
entering a bend and in general to
adapt the speed to the road type and
to existing speed limits.
Motorways
On motorways, adapt the set speed
to the situation and the weather.
Always consider that adaptive cruise
control has a limited visibility range, a
limited braking level and a certain
reaction time to verify if a vehicle is on
the driving path or not. Furthermore,
Adaptive cruise control was designed to brake as late as possible to allow
changing the lane before the
automatic braking. Adaptive cruise
control may not be able to brake the
vehicle in time to avoid a collision with
a much slower vehicle or after a lane
change.This is particularly true while
driving fast or if the visibility is
reduced due to weather conditions.
While entering or exiting a motorway, adaptive cruise control may lose the
vehicle ahead and accelerate up to
the set speed. For this reason,
decrease the set speed before the
exit or before the entry.
Vehicle path changes
If another vehicle enters your driving
path, adaptive cruise control will first
consider the vehicle when it is
completely in your path. Be ready to
take action and depress the brake
pedal, if you need to brake more
quickly.
198Driving and operatingIf the vehicle is equipped with
conventional cruise control, the
forward collision alert uses the front
camera in the windscreen to detect a
vehicle directly ahead, in your path.
If the vehicle is equipped with
adaptive cruise control, the forward
collision alert uses the radar sensor
and front camera to detect a vehicle
directly ahead, in your path.
A vehicle ahead is indicated by the
control indicator A.
If a vehicle directly ahead is
approached too quickly, a warning
chime and alert in the Driver
Information Centre is provided.
Additionally the driver gets notified by
a flashing red LED stripe or a pop up
symbol in the head-up display which
is projected on the windscreen in the
driver's field of view.
A precondition is that forward collision
alert in the vehicle personalisation
menu is not deactivated 3 125.
Activation
Forward collision alert with front
camera detects vehicles to distances
of approximately 60 metres and
operates automatically at all speeds
above walking speed.
Forward collision alert with radar
sensor detects vehicles to distances
of approximately 150 metres and
operates automatically at all speeds
above walking speed.
Alerting the driver The vehicle ahead control indicator
A illuminates green in the instrument
cluster when the system has detected
a vehicle in the driving path. On
vehicles with head-up display, A is
projected on the windscreen.
The control indicator A changes to
yellow when the distance to a
preceding moving vehicle gets too
small.Caution
The colour lighting of this control
indicator does not correspond to
local traffic laws on following
distance. The driver bears full
responsibility for maintaining safe
following distance according to
applicable traffic rules, weather
and road conditions etc. at all
times.
When the time to a potential collision
with a vehicle in front gets too small
and a collision is imminent, the
collision alert symbol pops-up in the
Driver Information Centre and the
driver gets notified by a flashing red
LED stripe or the pop-up symbol in
the head-up display which is
projected on the windscreen in the
driver's field of view.
202Driving and operatingA precondition is that forward collision
alert with front camera system is not
deactivated in the vehicle
personalisation menu 3 125.
The system includes: ● brake preparation system
● emergency automatic braking
● forward looking brake assist
● intelligent brake assist (only with radar sensor)
● front pedestrian protection system
Brake preparation system
When approaching a vehicle ahead
or a pedestrian so quickly that a
collision is likely, the brake
preparation system slightly
pressurizes the brakes. This reduces
the response time, when a manual or automatic braking is requested.
The brake system is prepared so that braking can occur more rapidly.
If equipped only with front camera the
system operates up to a speed of 50
mph.Emergency automatic braking
After activation of brake preparation
system and just before the imminent
collision, this function automatically
applies limited braking to reduce the
impact speed of the collision or
prohibit a crash. Depending on the situation, the vehicle may
automatically brake moderately or
hard. This front automatic braking can
only occur if a vehicle ahead is
detected, indicated by the vehicle ahead indicator A 3 197 . On vehicles
with front pedestrian protection, front
automatic braking can also occur
when a pedestrian ahead is detected,
indicated by the pedestrian ahead
indicator 7.
If equipped only with front camera the
system operates up to a speed of 50
mph.
Below a speed of 25 mph the system
can apply full braking.
Emergency automatic braking may
slow the vehicle to a complete stop to try to avoid a potential crash. If this
happens, emergency automatic
braking may engage the electricparking brake to hold the vehicle at a stop. To release press the electric
parking brake button or firmly press
the accelerator pedal.9 Warning
Emergency automatic braking is
an emergency crash preparation
feature and is not designed to
avoid crashes. Do not rely on the
system to brake the vehicle.
Emergency automatic braking will
not brake outside of its operating speed range and only responds to
detected vehicles and
pedestrians.
Forward looking brake assist
In addition to the brake preparation
system and emergency automatic
braking, the forward looking brake
assist function makes the brake assist more sensitive. Therefore, pressing
the brake pedal less strongly results
in immediate hard braking. This
function helps the driver brake
quicker and harder before the
imminent collision.
220Driving and operatingSystem limitationsCaution
For optimal operation of the
system, it is important to keep the
lenses of the cameras in the front
grille, the housings of outside
mirrors and in the tailgate between the number plate lights always
clean. Rinse the lenses with water and wipe with a soft cloth.
Do not clean the lenses with a
steam-jet or high-pressure jet
cleaner.
The panoramic view system may not
operate properly when:
● The surrounding is dark.
● The sun or the beam of headlights is shining directly into
the camera lenses.
● During nighttime driving.
● Weather limits visibility, such as fog, rain, or snow.
● The camera lenses are blocked by snow, ice, slush, mud, dirt.
● The vehicle is towing a trailer.
● The vehicle had an accident.
● There are extreme temperature changes.
Rear view camera The rear view camera assists the
driver when reversing by displaying a
view of the area behind the vehicle.
The view of the camera is displayed
in the Info-Display.9 Warning
The rear view camera does not
replace driver vision. Note that
objects that are outside the
camera's field of view and the
parking assist sensors, e.g. below
the bumper or underneath the
vehicle, are not displayed.
Do not reverse or park the vehicle
using only the rear view camera.
Always check the surrounding of
the vehicle before driving.
Activation
Rear view camera is automatically
activated when reverse gear is
engaged.
Functionality
The camera is mounted between the
number plate lights.
222Driving and operatingchanged in the Settings menu in the
Info-Display. Select the relevant
setting in Settings, I Rear Camera .
Info-Display 3 119.
Vehicle personalisation 3 125.
System limitations
The rear view camera may not
operate properly when:
● The surrounding is dark.
● The sun or the beam of headlights is shining directly into
the camera lenses.
● During nighttime driving.
● Weather limits visibility, such as fog, rain, or snow.
● The camera lenses are blocked by snow, ice, slush, mud, dirt.
Clean the lense, rinse with water,
and wipe with a soft cloth.
● The vehicle is towing a trailer.
● The vehicle had a rear end accident.
● There are extreme temperature changes.Fault messages are displayed with a
9 on the top line of the Info-Display.
Rear cross traffic alert Additional to the rear view camera
3 220 , rear cross traffic alert warns of
cross traffic from left or right side
when driving rearwards. When cross
traffic is recognized and the rear view
camera is activated, a warning
triangle with a direction arrow K
appears on the Colour-Info-Display,
showing the direction of the traffic.
Furthermore, three beeps will sound
from the speaker on the respective
side.The radar distance sensors are
located in the rear bumper.9 Warning
The rear cross traffic alert does not
replace driver vision. Note that
objects that are outside sensors,
e.g. below the bumper or
underneath the vehicle, are not
displayed.
Pedestrians, children or animals
are not detected.
Do not reverse the vehicle by only
looking at the Info-Display and
check the surrounding behind and
around the vehicle before
reversing.
Activation
Rear cross traffic alert is
automatically activated together with
the rear view camera when reverse
gear is engaged.