The Cadillac ATS coupe was revealed recently at the North American international Auto Show at Cobo Center in Detroit. The two-door ATS coupe, painted in a color called opulent blue will be built alongside the sesan and the Cadillac CTS line of coupes, sedans and wagons starting this summer at GM's Lansing Grand River assembly plant. The coupe is part of a strategy by the Detroit automaker's luxury brand to update its image, attract younger buyers and compete with German rivals BMW and Mercedes.