They are know as DIN removal tools. The faceplate for the A/C controls won't come off, you'll end up pulling the whole head unit out of the dash.
The tool is sold in pairs and is available at any auto parts store and many audio installation shops as it's used to remove din radios as well.
The tools fit in the little holes on either side of the faceplate, press some latches in, allowing the unit to be pulled out.