This was exactly what I was looking for. I figured there must be a fuse (someplace...) but I never would have guessed how to extract the radio from the console of my Opel Corsa (same radio of course) and find the fuse at the back of the radio (great place to put a fuse by-the-way).
I'd add that to remove the radio push in the nails maybe an inch and a half to move the spring clips towards the interior of the radio. Then the whole radio comes out. Don't try to take just the face of the radio off, which is what I first thought...
Thanks!
Lee
May 2012