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http://www.edmunds.com/insideline/do/News/articleId=120487 BMW's new Concept CS, a four-door, four-passenger luxury coupe believed to preview a model that will be produced soon, will be unveiled Friday at the Auto Shanghai show. The automaker says the concept's combination of luxury and sports car is a "unique combination never seen before" and emphasizes that with it, BMW is entering a segment where it has not been in the past.