166Driving and operatingThe driver can only accelerate up to
the preset speed. Deviations from the
limited speed may occur when driving downhill.
The preset speed limit is displayed in
the Driver Information Centre when
the system is active.
Activation
Press L.
If cruise control has been activated
beforehand, it is switched off when
speed limiter is activated and the
control indicator m extinguishes.
Set speed limit
Accelerate to the desired speed and
briefly press SET/-: the current speed
is stored as maximum speed.
Speed limit is displayed in the Driver
Information Centre.
Change speed limit
With speed limiter active, press
RES/+ to increase or SET/- to
decrease the desired maximum
speed.
Exceeding the speed limit
When exceeding the limited speed
without driver input, the speed will
flash in the Driver Information Centre
and a chime sounds during this
period.
In the event of an emergency, it is
possible to exceed the speed limit by
depressing the accelerator pedal
firmly nearly to the final point. In this
case no chime sounds.
Release the accelerator pedal and
the speed limiter function is
reactivated once a speed lower than
the limit speed is obtained.
Deactivation The limited speed will be stored andis indicated in brackets in the Driver
Information Centre. Additionally, a
corresponding message appears.
Speed limiter is deactivated, but not
switched off. Last stored speed
remains in memory for later speed
resume.
168Driving and operating
Simultaneously a warning chime
sounds. Depress the brake pedal and
steer the vehicle, if it is required by the
situation.
Selecting the alert sensitivity The alert sensitivity to near, medium
or far.Press V, the current setting is shown
on the Driver Information Centre.
Press V repeatedly to change the
alert sensitivity. The selected setting
is also displayed in the Driver
Information Centre. The last selected
setting will be stored when the vehicle
is switched off.Deactivation
The system can be deactivated in the
personalisation menu 3 92.
If the forward collision alert was
deactivated, alert sensitivity is set to
"medium" when the vehicle is
switched on next time.
General information
9 Warning
Forward collision alert is just a
warning system and does not
apply the brakes. When
Driving and operating169approaching 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
Forward collision alert is designed to warn about vehicles only, but may
react also to other 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,
windscreen damage or affected
by foreign items, e.g. stickers
Following distance
indication
The following distance indication
displays the distance in seconds 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 8 km/h.
When a preceding vehicle is detected
ahead, the distance is indicated in
seconds, displayed on a page in the
Driver Information Centre.
Select Information menu via steering
wheel buttons and press G to select
following distance indication 3 83.
The minimum indicated distance is
0.5 seconds.
If there is no vehicle ahead or the vehicle ahead is out of range, two
dashes will be displayed: -.- sec.
Active emergency braking
Active emergency braking can help toreduce the damage and injury from
crashes with vehicles, pedestrians and obstacles directly ahead, when a
collision can no longer be avoided
either by manual braking or by
steering. Before the active
emergency braking applies, the driver
is warned by the forward collision
alert 3 167 and front pedestrian
protection 3 172.
The feature uses various inputs (e.g.
camera sensor, brake pressure,
vehicle speed) to calculate the
probability of a frontal collision.9 Warning
This system is not intended to
replace the driver responsibility for driving the vehicle and looking
ahead. Its function is limited to
Driving and operating171not brake outside of its operating
speed range and only responds to
detected vehicles.
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,
depressing the brake pedal less
strongly results in immediate hard
braking. This function helps the driver brake quicker and harder before an
imminent collision.
The system operates up to a speed of 80 km/h.
9 Warning
Active emergency braking is not
designed to apply hard
autonomous braking or to
automatically avoid a collision. It is designed to reduce the vehicle
speed before a collision. It may not
react to animals. After a sudden
lane change, the system needs a
certain time to detect the next
preceding vehicle.
The complete attention of the
driver is always required while
driving. The driver must always be
ready to take action and apply the brakes and steer to avoid
collisions.
Intelligent brake assist
Intelligent brake assist may activate
when the brake pedal is applied
quickly by providing a boost to
braking based on the speed of
approach and distance to a vehicle
ahead.
Minor brake pedal pulsations or pedal movement during this time are normal and the brake pedal should continue
to be applied as required. Intelligent
brake assist will automatically
disengage only when the brake pedal is released.
9 Warning
Intelligent brake assist may
increase vehicle braking in
situations when it may not be
necessary. You could block the
flow of traffic. If this occurs, take
your foot off the brake pedal and
then apply the brakes as needed.
Front pedestrian protection
Front pedestrian protection 3 172.
Deactivation Active emergency braking can be
deactivated in the personalisation
menu in the Info display 3 92.
If deactivated, a message is
displayed in the Driver Information
Centre.
The system is reactivated the next time the vehicle is switched on.
System limitations In some cases, the active emergencybraking system may provide
automatic braking in situations that
seem to be unnecessary, for instance
172Driving and operatingin parking garages, due to traffic signsin a curve or due to vehicles in
another lane. This is normal
operation, the vehicle does not need
a service. Firmly apply the accelerator
pedal if the situation and
surroundings permit to override the
automatic braking.
In the following cases, active
emergency braking performance is
limited:
● When driving on winding or hilly roads.
● When not all vehicles are detected, especially vehicles witha trailer, tractors, muddy
vehicles, etc.
● When detecting a vehicle when weather limits visibility, such as in
fog, rain, or snow.
● During nighttime driving.
● When weather limits visibility, such as fog, rain, or snow.
● When the sensor in the windscreen is blocked by snow,
ice, slush, mud, dirt, windscreen
damage or affected by foreign
items, e.g. stickers.To avoid malfunction keep the areas
of the camera sensor in the
windscreen always clear of dirt, dust,
ice and snow.
Complete attention is always required while driving, and you should beready to take action and apply the
brakes and/or steer the vehicle to
avoid crashes.
Fault
In case the system requires a service, a message is displayed in the Driver
Information Centre.
If the system does not work as it
should do, vehicle messages are
displayed in the Driver Information
Centre.
Vehicle messages 3 90.
Front pedestrian protection
The front pedestrian protection
system may help avoid or reduce the
harm caused by front-end crashes
with nearby pedestrians when driving in a forward gear.The system uses the front camera inthe windscreen to detect a pedestrian
directly ahead in your path.
The front pedestrian protection
system can detect and alert about
pedestrians when in a forward gear at
speeds between 8 km/h and
80 km/h.
Additionally, the front pedestrian protection system can provide a
boost to braking or automatically
brake the vehicle.
During daytime driving, the system
detects pedestrians up to a distance
of approximately 40 metres. During
nighttime driving, system
performance might be limited.
The front pedestrian protection can
be set to Off, Alert or Alert and
Brake in the vehicle personalisation
3 92.
174Driving and operatingAutomatic braking can be disabled
through vehicle personalisation 3 92.
General information9 Warning
The driver must always be ready
to take action and apply the brakes and steer to avoid collisions.
9 Warning
Front pedestrian braking may alert
or automatically brake the vehicle
suddenly in situations where it is
unexpected and undesired. It
could falsely alert or brake for
objects similar in shape or size to
pedestrians, including shadows.
This is normal operation and the
vehicle does not need a service.
To override Automatic braking,
firmly depress the accelerator
pedal, if it is safe to do so.
System limitations
In the following cases, front
pedestrian protection may not detect
a pedestrian ahead or sensor
performance is limited:
● When vehicle speed is out of range from 8 km/h to 80 km/h .
● When the distance to an pedestrian ahead is more than
40 metres.
● When weather limits visibility, such as fog, rain, or snow.
● During nighttime driving.
● When the sensor in the windscreen is blocked by snow,
ice, slush, mud, dirt, windscreen
damage or affected by foreign
items, e.g. stickers.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.
Driving and operating175
The system has three ultrasonic
parking sensors in the rear bumper.
Activation
After 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 metres 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 83.
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
three seconds and then extinguishes. A message is indicated in the Driver
Information Centre.
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.