"lock car with fob,
insert key into drivers door,
twist to unlock and hold until windows are down,
release and then twist again for unlock for 10secs,
release,
twist to lock and hold until windows are in closed position,
release,
twist again to lock and wait for lights to flash."
resets the alarm apparantly, it seems to have helped with my cars alarm if it is this

but please get confirmation from someone else on here, i was told this by my mechanic friend at VW