Whoever is interested in touring cars or endurance racing will love this race! For me it's the most fascinating single race event of the year.
There will be a livestream on this website:
http://www.24h-rennen.de/Live.94.0.html?&L=1
AFAIK they will also provide a commentary in English.
171 cars! Here just some of the fastest:
Audi R8 LMS
Aston Martin Vantage GT3
BMW Z4 GT3
Corvette Z06 GT3
Ferrari P 4/5 Competizione
Ford GT40 GT3
Lexus LFA
McLaren MP4 GT3
Mercedes-Benz SLS GT3
Porsche 911 GT3