I have been at the Nordschleife several times and done some laps, but never in a looker :-)
But i have seen some beetle's and even a 181 driving quite fast there.
I will think it's most action on the webcam from 17.15-19,30...due to the opening times for tourist-driving the weekdays at the NS:
http://www.nuerburgring.de/Marvelous track and atmosphere at the Nordschleife.....and one of my best moments there is a sub 8 minute passenger lap in a 911 GT3.
Here's some photos from 1972, a racy 1302 here :
http://20832.com/event.php3?event=720709_h&id=2&lang=eng