Some are
lightly disguised future production vehicles, while others exhibit an environmentally friendly theme.Here's a look at a few of the more interesting concept vehicles on display at the show, which closes Monday: AUDI ALLROAD QUATTROThe German automaker has been building all - wheel drive
cars for years, so it's no surprise that a beefier version of the A6 station wagon is on the way.The Allroad Quattro show
car uses many of the same mechanical and suspension parts as the A6 wagon but wears a
sport - utility wagon body complete with large fender flares and huge tires.