Sabine is no longer a BMW ring taxi driver.
She now drives her own 911 GT3RS but I bet she is booked up for months ahead given she has other commitments.
Stay in the Pistenklause Tiergarten hotel restaurant if you want the chance to meet her.
Games are used even by race drivers and give a feel for what the track looks like but the changes in camber, gradient and surface are absent from that experience.
Get onto vimeo and youtube and search for gt3 and nordscliefe nurburgring and watch those instead.
And of course the Nurburgring crash videos on youtube.
This is a BMW film which is well worth watching about the ring
http://youtu.be/F-ATN8z2exc