What makes you think the wood on the dash is fake? Jaguar has a similar treatment to their dashes and they use a huge swath of wood, even on the X-type.
I'm still trying to figure out what exactly the point of this thing is. As much as they call it a coupe, it seems to me like it's a chop-top sedan. The proportions suggest the exterior dimensions will be as big as an S-Class but the interior will be less roomy than an E-Class.
Maybe now that Jaguar has made the XJ roomy, Mercedes decided to steal the formula for the old one?