The Nurburgring webcam (click here) is one of our favorite free-time activities as the fact that you never know what you're going to stumble upon makes it rather addicting. Just a few minutes ago, after a couple of bimmers, a Volkswagen Scirocco and a Ford Focus RS, we saw two camouflaged prototype models. We are not 100 percent sure, but we reckon that the first car up front is the 2010 Opel Astra followed closely behind by Buick's small-sized sedan. What's your guess?