Audi Sportback

Watch out Mercedes! Audi has set its sights on the top selling CLS with this stunning concept car.

Christened the Audi Sportback Concept the newcomer hints at the long awaited A7 - a four-door, four-seat luxury grand tourer which places performance and style on an equal footing.

It shares Audi's A4 and A5 chassis, and its powerplants too. So that means the range will include 2.8-litre, 3.0-litre and 4.0-litre petrol engines, and 2.7-litre and 3.0-litre diesels.

The showcar, powered by a 3.0-litre V6 diesel drove onto the show stand under its own power, delighting the crowd... Easily the biggest of the show so far.

Under the skin the Sportback Concept offers quattro four-wheel drive, LED lights and carbon composite brakes. Drivers will also be offered a choice of six speed manual and 7-speed S Tronic gearboxes when the car goes on sale in 2011.

See official pictures of the Audi Concept here.