CITROËN C4 Owner's Handbook Manual page 170

BLIND SPOT SENSORS
This driving assistance system warns
the driver of the presence of another
vehicle in the blind spot angle of their
vehicle (areas masked from the driver's
fi eld of vision), as soon as this presents
a potential danger.
This system is designed to im-
prove safety when driving and is
in no circumstances a substitute
for the use of the interior rear
view mirror and door mirrors. It
9
is the driver's responsibility to
constantly check the traffi c, to
asses the distances and relative
speeds of other vehicles and to
predict their movements before
deciding whether
lane.
The blind spot sensor system
can never replace the vigilance
and responsibility of the driver.
172
D R I V I N G
A warning lamp appears in the door
mirror on the side in question:
- immediately, when being overtaken,
- after a delay of about one second,
when overtaking a vehicle slowly.
to change
Operation
 On switching on the ignition, or en-
gine running, press this button to
activate the function; the warning
lamp comes on.
Sensors fi tted in the front and rear bum-
pers monitor the blind spots.