BMW Z4 Roadster Owner's Handbook Manual page 182

CONTROLS
The setting is accepted for all Intelligent Safety
Systems and saved for the currently used driver
profile.
Warning function
Light in the exterior mirror
Advance warning
The dimmed light in the exterior mirror indicates
when vehicles are in the blind spot or are ap‐
proaching from the rear.
Acute warning
If the turn indicator is switched on while a vehicle
is in the critical area, the steering wheel vibrates
briefly and the light in the exterior mirror flashes
brightly.
The warning is terminated when the other vehi‐
cle has left the critical area or the turn signal is
deactivated.
Flashing the light
When the vehicle is unlocked, the system per‐
forms a self-test by flashing the light.
182
Safety
System limits
Safety note
The system may not respond at all, or may re‐
spond too late, incorrectly or without justifica‐
tion due to limits of the system. There is a dan‐
ger of accidents or damage to property.
Observe the information on the system limits
and intervene actively if necessary.
Upper speed limit
At speeds over approx. 250 km/h, 155 mph, the
system is temporarily disabled.
At speeds below approx. 250 km/h, 155 mph,
the system once again responds according to
the setting.
Functional limitations
The system may have limited functionality in the
following situations, for example:
▷
▷
▷
▷
▷
A Check Control message is displayed in the
event of limited functionality.
Warning displays
Depending on the selected setting for warnings,
for example the warning time, it is possible for
more warnings to be displayed. As a result, there
may be an increased number of premature warn‐
ings about critical situations.
Online Edition for Part no. xxx - X/18
WARNING
If the speed of the approaching vehicle is sig‐
nificantly higher than the driver's own speed.
In thick fog, wet conditions or snow.
On sharp bends or narrow roads.
If the bumper is dirty, iced up or covered,
for example by stickers.
When a projecting load is being transported.