At the last track day, we had the Mercedes-AMG GT R, famous for its world record of being the fastest rear-wheel-drive car around the famous Nurburgring circuit. This year we had its more fashionable sibling - the GT Roadster. A convertible with plenty of oomph, it sure is a real eye-catcher. But, apart from its flamboyance, is it also capable of hitting the track with a blistering performance? We found out.