Taking its world premiere at Detroit Motor Show with the CST-V 556HP Cadillac Coupe, a new Cadillac XTS Platinum Concepts. GM calls it the concept model, but 203.5 inches (5170 mm) long XTS expected to greatly affect the upcoming flagship Cadillac sedans that will replace the Cadillac DTS, and very likely that STS. Full-size Cadillac sedan, which most likely vehicle shares a platform with 2010 Buick Lacrosse, and all the usual styling cues as a contemporary Cadillac models sharp and (more…)