The completely redesigned car sits on a modified version of the current E-Class's floorpan, albeit with a lower and wider track.
Design wise it retains the E-Class's rear wheelarch bulges, but loses the car-length crease of the original.
The CLS' extra length is said to have been used to make the rear more accessible, though only four seats will be offered.
The new car will be powered by the usual range of petrol and diesels - albeit with some eco tweaks. Like just about every other manufacturer, Mercedes has found a way to extract more power and increased efficiency from smaller engines.
Prices will follow shortly, probably with a bit of wincing all around.