Every two years, Bosch demonstrates a variety of products at its proving ground in Boxberg, Germany. The site includes a hair-raising high-speed oval, a white-knuckle handling course and a range of rough-road tracks peppered with potholes and other nasty surprises. All in all, the perfect location to allow 500 motoring hacks from across the globe put the very latest auto technology through its paces. Shaken but not stirred, Matthew Beecham reports.