I ran a Suzuki Swift from rent4ring on the nordschleife. The car was great with a friendly setup and the tires had very forgiving breakaway characteristics. Plan to be there for two days at least if you can. The track can close unpredictability for last minute events, accident cleanup, bad weather, etc and you don't want your visit spoiled because you didn't plan enough time to account for these possibilities. Also, try to go weekday mornings as the track will be least busy. I had planned a Friday and Saturday following a business trip and the track ended up being closed Friday and Saturday morning. It was a gorgeous Saturday afternoon though so everybody was at the track and traffic was absolutely nuts! It reminded me of my street racing days growing ups round NYC.
