CITROËN C4 PICASSO Handbook page 176

Driving
Limits of operation
The system cannot exceed the limits of the
laws of physics.
It is recommended that the system be
deactivated when the "space-saver" spare
wheel is in use.
The system should not be activated when
towing a trailer.
In certain critical situations, the system will
encourage the driver to immediately take back
control:
- if the vehicle in front slows down too much
or too suddenly, and the driver does not
brake,
- if a vehicle comes between your vehicle
and the vehicle in front.
174
As the radar's field of detection is quite narrow,
it is possible that the system may not detect:
- vehicles of reduced width (motorcycles,
scooters...),
- vehicles not running in the middle of the
lane,
- vehicles entering a corner,
- vehicles suddenly pulling out.
The cruise control does not take account of:
- pedestrians, cyclists, animals,
- stationary vehicles (traffic jam, red light,
breakdown...),
- vehicles crossing a junction,
- vehicles driving in the opposite direction.