Function of Active Brake Assist
Active Brake Assist consists of the following func‐
tions:
R
Distance warning function
R
Autonomous braking function
R
Situation-dependent braking assistance
Active Brake Assist can help you to minimise the
risk of a collision with vehicles or pedestrians or
to reduce the effects of such a collision.
If Active Brake Assist has detected a risk of colli‐
sion, you will be warned visually and acoustically.
If you do not react to the visual or acoustic warn‐
ing, autonomous braking can be initiated in criti‐
cal situations.
If there are pedestrians and cyclists crossing: in
especially critical situations, Active Brake Assist
can initiate autonomous braking directly. In this
case, the visual and acoustic warning occurs
simultaneously with the braking application.
If you apply the brake yourself in a critical situa‐
tion, or apply the brakes during autonomous
braking, situation-dependent braking assistance
occurs. The brake pressure increases up to maxi‐
mum full-stop braking if necessary. Situation-
dependent braking assistance only intervenes
when the brakes are applied firmly; otherwise, it
remains within the autonomous braking process.
&
WARNING Risk of accident caused by
limited detection performance of Active
Brake Assist
Active Brake Assist cannot always clearly
identify objects and complex traffic situa‐
tions.
Due to the nature of the system, complex
driving conditions may also cause Brake
Assist to intervene or not intervene without
reason. In such cases, and in the event of
Active Brake Assist malfunctioning, the brake
system will continue to be available with full
brake boost and BAS.
#
Always pay careful attention to the traf‐
fic situation; do not rely on Active Brake
Assist alone. Active Brake Assist is only
an aid. The driver of the vehicle is
responsible for keeping a sufficiently
safe distance to the vehicle in front, for
vehicle speed and for braking in good
time.
#
Be prepared to brake or swerve if nec‐
essary.
Also observe the system limitations of Active
Brake Assist.
The individual subfunctions are available in
the following speed ranges:
Distance warning function
The distance warning function warns you in the
following situations:
R
At speeds greater than approximately
30 km/h, if over several seconds the distance
maintained to the vehicle travelling in front is
insufficient for the driven speed.
The
·
distance warning lamp then lights
up in the instrument cluster.
R
At speeds greater than approximately
7 km/h, if your vehicle is critically close to a
vehicle or pedestrian.
An intermittent warning tone sounds and the
·
distance warning lamp lights up in the
instrument cluster.
Brake immediately or take evasive action, provi‐
ded it is safe to do so and the traffic situation
allows this.
The distance warning function can aid you in the following situations with an intermittent warn‐
ing tone and a warning lamp:
Vehicles travel‐
ling in front
Stationary vehi‐
cles
Crossing vehi‐
cles
Crossing pedes‐
trians/cyclists
Stationary
pedestrians
Up to approx.
250 km/h
Up to approx.
200 km/h
No reaction
Up to approx.
60 km/h
No reaction
Driving and parking 155
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