Ahh...I think I know who the guy who's driving M3 is...he's swede and very expirienced at Nurburgring. As far as I remember, P-car is 993 RS.
Johan Nimmersjö is going to drive this year 24hr VLN Nurburgring contest this year.
This is his homepage:
http://www.sticka.se/schwedenkreuz/index_frame.asp?lang_id=2