The wifes car has started making a sort of loud screechy sort of sound when reversing for the 1st time that day( doesn't happen every day) like the hand brake has stuck slightly on, there after all reversing is fine that day. Having looked on a Bmw forum this seems to be very normal on the E46 something to do with being damp etc...
someone has stuck a youtube video up and its this sound but not so aggressive.
https://www.youtube.com/watch?v=HwV2rZ5B4s0#t=12" onclick="window.open(this.href);return false;
and then typing the same problem but without any car make it comes up with the same answer.
I've never had a car make this sound before ! but apparently its normal

Have you experienced it ?