Sure, it looks like an Audi A6 that's foaming at the wheelwells, but it's actually a test mule underpinned by a new chassis Audi's developing to form the basis for the next-generation A4 and A6 — as well as a new Volkswagen four-door coupe. We'll see it first in (under?) Audi's new A5 coupe, which may appear as early as 2007, as a 2008 model.
Audi A5: Spy shots! [German Car Blog]