Dont know if this has been posted on this forum before...its been out for a while... but here is an illustrated guide to driving the North Circuit with the ideal racing line and suggestions... prepared by BMW Motorsport.

http://www.bmw.com/generic/com/en/fa...rdschleife.pdf

pretty good guide... i just got a chance to drive the "Ring" last month... bad ass track... it lives up to all the hype... the elevation change and blind crests and dips... i got a lot of respect for it...