In the United States, Audi is online since the beginning of the year with a project called Truth in Engineering, a virtual showcase of all its models with a strong luxury touch.
The latest mini-site of the series, has gone live recently, and is dedicated to the A4 model. Althought it is a very corporate (boring) site (if you aren't specifically interested it in the car) I like it because of its autoplay system for navigation.
Basically, when you get on the site a flash video starts automatically, taking you through an overview of the five content sections.
The autoplay solution for navigation has already been used recently by Russian Standard Vodka and I believe it's a good trick to engage users in a two minutes (one way) experience on the site and trigger them to further explore the contents.