BMW Z4 Roadster Owner's Handbook Manual page 173

Detection range
The detection ability of the system is limited.
Only objects detected by the system are taken
into account.
For this reason, the system may fail to respond
or only respond after a delay.
It is possible that the following are not detected,
for example:
▷ Slow-moving vehicle when approaching it at
high speed.
▷ Vehicles suddenly cutting in or braking heav‐
ily.
▷ Vehicles with an unusual rear appearance.
▷ Two-wheeled vehicles ahead.
Upper speed limit
At speeds over approx. 250 km/h, 155 mph, the
system is temporarily disabled. As soon as the
speed drops back below this value, the system
responds once again according to its settings.
Functional limitations
The system may have limited functionality in the
following situations, for example:
▷ In thick fog, wet conditions or snow.
▷ On sharp bends.
▷ When Driving Stability Control Systems are
limited or deactivated, for example DSC OFF.
▷ If the field of view of the camera or the wind‐
screen in front of the rear-view mirror is soiled
or covered.
Online Edition for Part no. xxx - X/18
Safety
▷ If the camera has overheated due to exces‐
sively high temperatures and has been tem‐
porarily deactivated.
▷ Depending on the equipment version: if the
radar sensors are soiled or covered.
▷ Up to 10 seconds after starting the engine
using the start/stop button.
▷ During the camera calibration process imme‐
diately after vehicle delivery.
▷ When there is sustained glare due to oncom‐
ing light, for example the sun is low in the sky.
Sensitivity of the warnings
The greater the sensitivity of the warning set‐
tings, for example warning time, the more warn‐
ings will be displayed. As a result, there may be
an increased number of premature or unjustified
warnings and reactions.
Person warning with City
light braking function
Principle
The system can help to avoid accidents with pe‐
destrians and cyclists. If an accident cannot be
avoided, the system helps to reduce the collision
speed.
The system warns of the possible risk of collision
in the urban speed range and brakes automati‐
cally, as necessary.
General
At speeds above approx. 5 km/h, 3 mph, the sys‐
tem warns of the possible risk of collision with
pedestrians and cyclists.
Pedestrians and cyclists are taken into account if
they are located within the detection range of the
system.
The system is controlled using the following sen‐
sors, depending on the equipment:
▷ Camera in the area of the rear-view mirror.
CONTROLS
173