A nice video of prototypes caught testing at the Nurburgring. Among others, you can see a new Cadillac, a couple of Lamborghinis (Gallardo and Murcielago LP640) , the Audi R8, the Maserati due-porte, and the BMW 1-Series Cabrio.
The most impressive ? The supposed Panamera Mule with the BMW M5 body and with extra-wide wheel arches. What kind of engine is lurking under the trunk to push it around like that ?
You can find some photos of this test-session by Hanjo Van Heiningen in the Autoweek.nl forums.
Via | Autopareri Forum