BMW M4 COUPE Owner's Manual page 119

Functional limitations
The system may not be fully functional in the
following situations:
▷ When a vehicle is approaching at a speed
much faster than your own.
▷ In heavy fog, rain or snowfall.
▷ In tight curves or on narrow lanes.
▷ If the bumper is dirty or iced up, or covered
with stickers.
▷ If cargo protrudes.
A Check Control message is displayed when
the system is not fully functional.
For US owners only
The transmitter and receiver units comply with
part 15 of the FCC/Federal Communication
Commission regulations. Operation is gov‐
erned by the following:
FCC ID:
▷ NBG009014A.
Compliance statement:
This device complies with part 15 of the FCC
Rules. Operation is subject to the following
two conditions:
▷ This device may not cause harmful inter‐
ference, and
▷ this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modifications or changes to
these devices could void the user's authority to
operate this equipment.
Brake force display
Concept
Additional brake lamps indicate emergency
braking to the traffic behind. This can reduce
the risk of a rear-end collision.
Online Edition for Part no. 01 40 2 974 597 - VI/16
Safety
General information
▷ During normal brake application, the outer
brake lights light up.
▷ During heavy brake application, the inner
brake lights additionally light up.
Attentiveness assistant
Concept
The system can detect decreasing alertness or
fatigue of the driver during long, monotonous
trips, e.g., on highways. In this situation, it is
recommended that the driver takes a break.
Safety information
WARNING
The system does not release from the
personal responsibility to correctly assess
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 an acci‐
dent. Make sure that the driver is rested and
alert. Adjust the driving style to the traffic con‐
ditions.◀
Function
The system is activated each time the engine
is started and cannot be switched off.
After travel has begun, the system monitors
certain aspects of the driver's behavior, so that
decreasing alertness or fatigue can be de‐
tected.
Controls
119