BMW X1 Owner's Manual page 184

CONTROLS
Warning function
Warning light in exterior mirror
The warning light in the exterior mirror warns
of a possible collision with a detected vehicle.
Prewarning
In the event of a prewarning for Active Blind
Spot Detection, the dimmed warning light on
the exterior mirror indicates when vehicles are
in your blind spot or approaching from the rear.
Acute warning
When an acute warning is issued by Active
Blind Spot Detection, the steering wheel vi-
brates briefly. The warning light in the exterior
mirror flashes brightly.
An acute warning is issued if the following con-
ditions are met:
▷ Another vehicle is located in the critical
area.
▷ Your own vehicle is approaching the other
lane.
▷ Depending on the system setting when the
turn signal is turned on.
The warning stops when the other vehicle has
left the critical area.
Steering intervention
Depending on national-market version: The
Active Blind Spot Detection system may per-
form an active steering intervention when
there is no response to the steering wheel
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Safety
Online Edition for Part no. 01405A8A536 - VI/23
vibration and a lane marking is crossed at
speeds of up to 130 mph/210 km/h. The steer-
ing intervention helps return the vehicle into
the lane. The steering intervention can be no-
ticed on the steering wheel and can be man-
ually overridden at any time.
The steering intervention is carried out from
a minimum speed. The minimum speed is dis-
played on the control display.
With trailer towing
No steering intervention is performed when the
trailer power socket is occupied or trailer tow-
ing is activated.
Depending on the vehicle equipment and na-
tional-market version, the system does not is-
sue a prewarning. In the event of a risk of colli-
sion, an acute warning continues to be issued.
The warning function may be restricted. Warn-
ings can be displayed late or not at all, e.g., if
the speed of the approaching vehicle is much
higher than your own speed. An increased
number of unwarranted warnings may occur.
A Check Control message is displayed.
Warning light flashing
As a self-test of Active Blind Spot Detection,
the warning light on the exterior mirror flashes
briefly when the vehicle is unlocked.
System limits
General information
Follow the system limits in the "Collision warn-
ing systems" chapter.
Functional limitations
The Lane Change Warning system may be re-
stricted in the following situations: