Most electrical things are aren't they!? lol I thought it might not be equipped but then why would it have the button? I have seen a light come on the dash for a few seconds on engine start up that could be it (a wheel with a number of small rectangles all around it!?) I have no warning lights on and thus no error codes would come up. My ASC button is on the dash, tucked down next to the steering column by the drivers door.
The only thing I can think of from what you suggested is that a fuse has gone, or that it's not equipped (but again, surely it would have a blank instead of the actual ASC button?). I'll go check the fuse as soon as I get time....
Cheers for the suggestions bud!