Audi paints giant A7 billboard – Click above to watch the video after the jump

This is an ad for the all-new 2012 Audi A7 Sportback in Berlin. It looks perfectly normal, but would you believe that it's nearly 10,800 square feet in size? How about the fact that it was painted with 200 cans of spray paint and took 14 days to create?Translated to English, the billboard roughly reads, "Nothing is more inspiring than a blank sheet of paper. It is the opportunity to create something unique." Unique, indeed, and very fitting for a vehicle as segment-warping as the new Audi A7 Sportback. It's Audi 's answer to the Porsche Panamera , and if we're honest, we find it absolutely stunning. Follow the jump to watch a video showing how Audi's latest (and largest) marketing campaign came to life.