BMW Saloon 3 Series Owner's Handbook Manual page 216

CONTROLS
WARNING
Displays and warnings do not relieve you of
your personal responsibility. System limitations
can mean that warnings or system responses
are not issued or are issued too late, incorrectly
or without justification. There is a risk of acci‐
dent. Adapt your driving style to the traffic con‐
ditions. Observe the traffic situation and inter‐
vene actively if the situation warrants it.
Overview
Radar sensors
The radar sensors are located in the rear
bumper.
Keep the bumpers clean and unobstructed in the
area of the radar sensors.
Switching on/off
The system is automatically activated at the start
of each journey.
The system is deactivated in the following situa‐
tions:
▷ When reversing.
▷ If the trailer socket is occupied, for example
when operating with a trailer or bicycle carrier.
System limits
The system may have limited functionality in the
following situations:
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Safety
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Road priority warning
Principle
The system provides support in situations where
signs or light signal systems indicate that the
driver must give way.
General
The system uses a camera to evaluate the road
signs and light signal systems.
The navigation system forwards information re‐
garding the route to the system.
A warning is given if a right-of-way is about to be
violated in the following traffic situations, for ex‐
ample:
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Starting from a variable minimum speed, the sys‐
tem issues warnings up to approximately
65 km/h, 40 mph.
Online Edition for Part no. xxx - VI/19
If the speed of the approaching vehicle is sig‐
nificantly higher than the driver's own speed.
If the approaching vehicle is travelling slowly.
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.
If the sensors' field of view is obscured, for
example due to garage walls, hedges or
mounds of snow.
When a projecting load is being transported.
At a junction.
At a T-junction.
On a slip road.
At a roundabout.
In the event of a red traffic light.