Hi Folks, ive a 2003 TDI Bora and sometimes im hearing a screeching noise coming from what sounds like my rear wheels the noise goes away when i touch the brakes then returns again also when i go over ramps no matter how slow i can hear it again. This happens twice or three times a day lasting 10/15 mins each time then it goes away again. Would anyone have any ideas what this is i was thinking maybe the wheel bearings.