The red mist has just descended upon me, and that’s a good thing. It’s my second four-lap stint in the 2019 Mercedes-AMG GT 63 S 4-Door Coupe on the Circuit of the Americas outside Austin, Texas, and four-time DTM champion Bernd Schneider is leading the way in an AMG GT-R. He just took off like a, well, like a four-time DTM champion…