Bit of a random one, A3 was locked with the windows down the other day (rare british sunny day), approached my car, casually threw my phone onto the seat through the open window and it set the alarm off. Good to know that the sensors are that sensitive! Read a couple of weeks ago about someone being concerned about just how sensitive theirs were so thought I would share.
Also, not sure how many people know this (or if everyone knows ) but I am LOVING the 'button start' style ignition. Found out from someone on another forum that you can turn the key and release it and the car will start itself. Very useful for 'putting seat belt on time' hahaha peace out