Having just driven the 2009 A6 with the new 3.0-liter V-6 I have to say it is unbelievably quick. Not time-travel quick, but plenty fast for leadfoots. The A6 is not really the company’s best-known, nor best-selling product. The 60-second spot – worth around $6 million – is a lot to invest in the model, but it will also build brand identity as Audi looks to continue stealing market share from BMW and Mercedes.