PEUGEOT 3008 Handbook page 166

Driving
Activation
 Press button 1 , the indicator lamp comes on.
The system is activated but will only operate
from 45 mph (70 km/h).
164
Programming the alert
value
 Select the alert value required using
button 2 , in steps of 0.1 second:
- up to increase: "+",
- down to decrease: "-".
Example with a value of 2 seconds:
The alert value can be programmed to between
0.9 second and 2.5 seconds.
The visual alert can be deactivated by
programming a value of 0 second.
Alert
When the time (in seconds) between your
vehicle and the vehicle in front is less than the
programmed time (alert value), a visual alert
flashes.
A safety time of 2 seconds is
recommended in normal driving
conditions (correct traction and speed)
to avoid a collision in the event of
emergency braking.