Some excerpts from the manual:
Indicator lamp displays
> The indicator lamp beneath the interior mirror
flashes continuously:
The system is armed.
> The indicator lamp flashes immediately
after the vehicle is locked:
Doors, hood or luggage compartment lid/
tailgate are not properly closed. Even if you
do not close the alerted area, the system
begins to monitor the remaining areas, and
the indicator lamp flashes continuously
after approx. 10 seconds. However, the
interior motion sensor is not activated.
> If the indicator lamp goes out immediately
after the vehicle is unlocked:
Your vehicle has not been disturbed while
you were away.
> If the indicator lamp flashes for 10 seconds
immediately after the vehicle is unlocked:
Your vehicle has been disturbed while you
were away.
After an alarm has been triggered, the indicator
lamp will flash continuously.
The vehicle alarm system responds:
> When a door, the hood or the luggage compartment
lid/tailgate is opened
> When attempts are made to start the vehicle
> When there are movements in the vehicle
interior: interior motion sensor, refer to
page 24
> When the car's inclination changes, for
instance if an attempt is made to jack it up
and steal the wheels or to raise it prior to
towing away: Tilt alarm sensor, refer to
page 24
> When there is an interruption in the power
supply from the battery