This is video showing the interaction design of a Surface interface to configure the Audi A4.

Audi A4 Car Configurator by Neue Digitale / Razorfish in collaboration with Realtime Technology AG. Showcased at this year’s IAA - the world’s leading automotive fair. The application allows multiple users to configure an Audi A4 simultaneously by changing the car's paint finishes, rims and by selecting and coloring style package components. The configured A4 is experienced in an immersive 3d environment, in which users can navigate seamlessly by zooming and panning using a multitouch-enabled interface

View the video on Vimeo.