Yep, Giller you're right.
That is a no brainer of course:
High Speed ONLY where it is legal. Illegal speeding endangers EVERYONE as it cannot be anticipated, ERGO endangers everyone.
As I regularly drive on US/Canadian roads, I know there are a lot of "scary" star wars drivers on your roads, you guys just don't like to follow "rules" as happily as we do over here
...oh and I have seen some junkers on the roads, they would not last a day over here, would be a feast for the Polizei telling people how to keep roads safe. Just install stricter laws (mandatory driving schools, Tüv, zero alcohol tolerance, point system with the possibility to loose your drivers license, etc.) and there is no reason, why you guys should not have a "safe" Autobahn.