Auto News Roundup 9-10-09: Four-door Smart car being discussed, new GM chairman to star in ads

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-- Renault, Daimler talk about four-door Smart car project. Detroit News

-- GM to feature new chairman in spots pitching carmaker to public. Adage

-- Photos of Audi R8 Spyder are leaked. Leftlanenews.com

-- GM to lay off about 1,000 by Oct. 1. Detroit News

-- Joni Gray