Alas, the driving mentality in Germany is changing. It's turning from an automotive utopia to a haves-versus-have-nots class war.
Driving there is very expensive - cars, training, fuel, taxes... all turn it into an experience for the rich. Those that can afford cars usually snag the cheapest slowest they can just to be able to transport themselves.
So, a LOT of people look at the high-end cars zooming by at 240ph (130 kph is the defacto national limit - above that in a derestricted zone it starts affecting proportional fault... a great system) as being rich flaunting and insulting poor.
Hence, there are regular movements to abolish derestricted zones. There are also a great many vigilantes trying to force others to slow down.
For an interesting read on the topic, check out the
Turbo Rolf story. In effect, poor single mom (Kia) got startled by a Mercedes that suddenly showed up behind her while she was lollygagging in the fast lane. She panicked, swerved, tumbled, and killed her own child. The court of public opinion convicted Rolf.
I seriously hope the Germans keep their derestricted speed zones - it helps them push their designs better than many other national manufacturers. They're "driving" the industry.