There are some "open road" races in southwest USA. There are even some video clips in the Mustangworks site.
I have no knowledge of DTM cars.
The only time I was in Germany, my friends were too afraid to let me out on the Autobahn, se they never let me leave the airport! (no kidding) We never left the terminal on our 6-hour stop.
------------------
Darius Rudis
Roadracer: Home built t-arm/panhard suspension powered by an S-trimmed motor :-)
My Mustang Page