Germany doesn't need a space program. It has the Autobahn. High on the to-do list of any self-respecting auto enthusiast, driving the German Autobahn is Himmel on earth. But if you're going to do it, you need the right venue and the right vehicle. It's often misunderstood, but only about half the system is without speed restrictions (much of it in the southern region). And while many modern European cars have 155-mph limiters installed, they're easily undone.

So here are some must-drive German cars for the must-drive German highway. We've even matched the rides and roads to optimize the experience.

1- Audi RS 4
2- BMW M6
3- Porsche 911 GT3
4- Mercedes-Benz SLR McLaren
5- Porsche Carrera GT
6- Volkswagen GTI

More details here