By Steve Johnson, Chicago Tribune. To the showrooms, America! Automobile advertising dominated Sunday's Super Bowl XLVI, with everything from apocalypse-defying Chevy trucks to a vampire-killing Audi. Meanwhile, Clint Eastwood, Chrysler and General Electric pushed economic recovery and patriotism during the marketing 'n' football extravaganza, while Budweiser and the NFL delivered history lessons. Pop cultu ...