Mate has a 9 month old Audi A3 fitted with the factory alarm. It goes off for no apparent reason - but only after dark.
He's at his place in Spain (minus the car) for the summer, and I'm looking after things here. Luckily, a next door neighbour also has a set of the car keys as I live a short way off and wouldn't hear the alarm. Basically I've been charging the car battery every two weeks.
I read the car owner's manual and you can disable both the motion and ultrasonic sensors via push buttons on the driver's door jam - but this apparently didn't work as it went off again. And simply resetting the alarm with the zapper switches those interrupts back to normal.
I've tried rocking the car with the alarm on and this doesn't set it off - nor does slapping a window hard. Both of which set off the alarm on my car
- which doesn't false trigger.
I've disconnected the battery and will contact the dealer today but wondered if anyone had any fixes?