Hello, recently I bought a second hand Volvo S40 (2004) and I dont know if the car has an alarm system or not. During locking/unlocking it never emits any sound. None of the tests from the owner's manual succeeded to trigger the alarm. However it has
this LED on the dashboard (which is never blinking), this
button for deactivating some alarm's sensors too. Is there any chance that the Volvo has an alarm but is is malfunctioning and how can I verify this?