BMW 4 Coupe Series Manual page 208

CONTROLS
All other systems can be restored to the desired
setting.
PostCrash – iBrake
Principle
In the event of an accident, PostCrash can bring
the vehicle to a halt automatically without inter‐
vention by the driver in certain situations.
General information
PostCrash can reduce the risk of another colli‐
sion and subsequent consequences.
At standstill
After coming to a halt, the brake is released auto‐
matically.
Harder vehicle deceleration
In certain situations, it can be necessary to bring
the vehicle to a halt more quickly than the Brake
Assistant allows.
To do this, quickly apply extra force to the brake.
For a brief period, the braking pressure will be
higher than the braking pressure that is achieved
by the automatic braking function. Automatic
braking is interrupted.
Interrupting automatic braking
It can be necessary to interrupt automatic brak‐
ing in certain situations, for instance for an eva‐
sive maneuver.
Interrupt automatic braking:
▷ By pressing the brake pedal.
▷ By pressing the accelerator pedal.
208
Safety
Online Edition for Part no. 01405A392C9 - VI/21
Fatigue alert
Principle
The Fatigue Alert can detect decreasing alert‐
ness or fatigue of the driver during long, monoto‐
nous trips, for instance on highways. The system
recommends a break.
Safety information
Warning
The system cannot serve as a substitute for the
driver's personal judgment in assessing one's
physical state. An increasing lack of alertness or
fatigue may not be detected or not be detected
in time. There is a risk of accident. Make sure
that the driver is rested and alert. Adjust driving
style to traffic conditions.
Function
The system is switched on each time drive-ready
state is switched on.
After travel has begun, the system monitors cer‐
tain aspects of the driver's behavior, so that de‐
creasing alertness or fatigue can be detected.
This procedure takes the following criteria into
account:
▷ Personal driving style, for instance steering
behavior.
▷ Driving conditions, for instance time, length of
trip.
▷ Depending on the equipment: attention of
the driver through the Driver Attention Cam‐
era.
Starting at approx. 43 mph/70 km/h, the system
is active and can also display a recommendation
to take a break.