The next generation Mercedes S-class, currently in an advanced stage of development, will grow from just being a sedan into filling the rolls of the Maybachs and of the CL coupe. This is the first time the replacement for the CL-Class has been spotted out in the open. Image galleryThe model will be known as the S-class Coupe, filling a niche much like the C and E-class two-door models.COMING SOONFront styling looks slightly different to the S-class. The headlights look like slimmer versions of the ones on the SL. Engine-wise; we should still see the twin-turbo V8 and V12 units seen on current Mercedes models. The automaker is also working on a twin-turbo three-litre V6 for the C400.The new S-class could debut as early as April 2013 at the Shanghai auto show.