My A4 Avant's alarm has started to go off at night. Don't know if it's something to do with the cold weather (-3C). There is also a ticking noise that's coming from a black plastic box in the driver' side storage compartment in the boot. Could be a pump or something. It ticks once i activate the central locking and, gets faster, then stops, all in about 10 seconds.

This is the first winter i've had with the car. The previous owner obviously deactivated the horns as the alarm iself is just a beeping noise. Could be a clue there........

Anyone know what's going on?

Cheers

Chris.