BMW Touring plug-in hybrid 3 Series Owner's Handbook Manual page 216

CONTROLS
Advance warning
An advance warning is given for example if there
is an impending risk of collision or the distance
from the vehicle ahead is too short.
The driver must intervene personally when an
advance warning is given.
Acute warning with braking function
An acute warning is given when the vehicle is ap‐
proaching another object at a high differential
speed and there is an immediate risk of a colli‐
sion.
The driver must intervene personally when an
acute warning is given. Depending on the driving
situation and the vehicle's equipment, the acute
warning may be supported by a brief jolt in the
brakes.
If the warning time setting is "Late", the jolt does
not occur.
If necessary, the system can also assist by brak‐
ing the vehicle automatically if there is a risk of a
collision.
An acute warning can be triggered even without
a previous advance warning.
Brake intervention
The warning prompts the driver to take action.
When the brake is operated during a warning, the
maximum necessary brake force is applied. Brak‐
ing assistance requires that the brake pedal is
depressed sufficiently quickly and firmly before‐
hand.
The system can also assist by braking the vehi‐
cle automatically if there is a risk of a collision.
At low speeds, the vehicle can be braked to a
stop.
City braking function: brake intervention takes
place at up to approx. 80 km/h, 50 mph.
With radar sensor: brake intervention takes place
at up to approx. 250 km/h, 155 mph.
At speeds above approx. 210 km/h, 130 mph,
brake intervention takes the form of a brief jolt.
There is no automatic deceleration.
216
Safety
Online Edition for Part no. 01405A1EA53 - X/20
Braking can be discontinued either by pressing
the accelerator pedal or by actively moving the
steering wheel.
Object detection may be limited. Take into ac‐
count the detection range limits and the func‐
tional limitations.
System limits
Safety note
WARNING
The system may not respond at all, or may re‐
spond too late, incorrectly or without justifica‐
tion due to system limitations. There is a risk of
accident or material damage. Observe the in‐
formation on the system limits and intervene
actively if necessary.
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.
For example it is possible that the following may
not be detected:
▷ Slow-moving vehicle when approaching it at
high speed.
▷ Vehicles suddenly cutting in or braking heav‐
ily.
▷ Vehicles with an unusual rear appearance.