The unadulterated beauty that is the BMW CS Concept cannot decide whether it wants to be built. A little more than a year ago the CS Concept was going to be the basis for a new flagship sedan. A month ago, BMW turned heel and walked away from a production version, running instead into the arms of smaller vehicles and EfficientDynamics. Now, Evo claims it has caught BMW testing a CS mule near BMW's headquarters. What is actually pictured, however, is a 7 Series with a CS-style nose and headlights. While a production CS would be based on the 7 Series, this is a long way from BMW actually building the CS. We aren't saying they won't, since every car has to start somewhere... but we are saying be skeptical.