http://germanyiswunderbar.com/
There's a lot of great roads in Germany, maybe too many to sort through. My wifes relations live in the Old East Germany and the Hartz mountains have some truely great roads, although there are still a few bad roads left from the former times.
In Germany there are still plenty of private B&B's you need to look up 'Pension' they tend to have signs out side the house or you can stay in a Gasthof which is more like a pub with overnight accomodation.