Hey guys. I have a 99 323is and just recently the a/c went out as I was driving (lucky me I live in Phoenix) The display panel will go dark and the buttons will not respond, then the display will come back on and everything will be fine. It will cut in and out like this pretty frequently and I am thinking that it is the a/c control unit that sits behind the display. Just wanted to check if anyone else has had a similar issue before I drop the $300 on a new unit. Any feedback is appreciated.