Well placed sources tell the Spies that this is the 4-door coupe that BMW will unleash against the Mercedes CLS.
The Concept CS will share underpinnings with the next-generation 7 Series and will come in at just over 200 inches in length, and a huge 78 inches in width, but only 53.5-inches in height.
The Concept CS will attempt bridge the gap between the 7 Series and Rolls-Royce and defend the badge against the Porsche Panamera and Aston Martin. With power coming from a 6.0 liter V12 we expect output to be around 600 ponies.
We also hear rumors that the X6 back end has a small resemblance…