Following a recent spin in a new E250cdi, I popped into MB Brooklands to see if they had any literature and price lists and there was an MB marketing chap giving a presentation on the new E-class. Following the presentation I went up to find out whether he had driven the car and if so what engines, specifically the E350cdi. It transpires that he had driven all the engines extensively at the launch event in Majorca, where he also drove the coupe and sat in but didn't get drive the new estate. A sales chap subsequently joined the conversation and he had also been to the launch and confirmed the range of vehicles. It would therefore seem very peculiarly that the estate would be presented to dealers and marketing at the launch only to be held back for such a lengthy period. From all I read, off the back of mostly favourable reviews I guess, the new saloon looks on course to reclaim the number one sales spot from the Audi A6, and if there is a delay, perhaps the sales figures were greater than expected and have led to a shortfall of engines.
The 4 cylinder S-class sounds unlikely as the 250cdi, though probably powerful enough, has a noise level somewhere in between the 520d and the 525d, which I suspect would hardly be refined enough for this level.
Could be wrong, but to my eyes the entire report reads like a late April fools.