We visited this joint a few years ago. Actually we legged it all the way from Dresden, quite a hike, but totally worth it.
They have a Phaeton (the quick one) set up on hydraulics like a flight simulator you can sit in and do a do a few virtual laps of their test track. I managed to put it into the wall at 240, much to the amusement of the attendant. Who said the Germans don't have a seance of humor?
Here's a picture from the men's bathroom. Very impressive and with a lovely floral aroma.