IMDB link
http://www.imdb.com/title/tt1129442/

Like Transporter 2, Transporter 3 will be sponsored by Audi
and, according to Audi France site http://www.audi.com/audi/fr/fr2/0/Evenements/transporteur.html, there will be:
2008 Audi A8 D3 (Typ 4E) and
2008 Audi R8 (Typ 42)