A Czech millionaire whose Bugatti Chiron hit 417 kilometres per hour while blasting down the German autobahn has refuelled a debate about clamping speed restrictions on the country’s famous high-speed highways. Police are investigating the incident after driver Radim Passer, 58, posted a video of the run along an unrestricted three-lane section of the A2 motorway between Berlin and Hanover on his YouTube channel. There is an ongoing debate in Germany over whether or not speed limits should be imposed on unrestricted autobahn sections and the issue was championed by green-leaning political part…