Some behind the scenes footage. Notice how race director Jochen Neerpasch spills the beans @ 5:45 and gives a clue to Mercedes' future involvement in Formula One. Altough I don't know if it was public knowledge at the time, the commentator certainly seems surprised. And look who's there too: Michael Schumacher

http://en.wikipedia.org/wiki/Mercedes-Benz_C11

. (less info)