Also found this interesting onboard video for the Supertest on the Sachenring:
http://www.autobild.de/videos/video-...4-5139032.html
Best time: 1:37,74
Audi R5: 1:40, 81
M6: 1:37,67
M3 GTS: 1:37,17
Other Sachenring times:
http://fastestlaps.com/tracks/sachsenring.html