So it appears details of the new Mercedes E Class are now available on the MBUK website
http://www2.mercedes-benz.co.uk/content/unitedkingdom/mpc/mpc_unitedkingdom_website/en/home_mpc/passengercars/home/new_cars/models/e-class/e-class-saloon.flash.html
However, as someone else commented early on, lets see what the UK team do with options and sure enough all those lovely pictures we have seen, which are likely the German or US aimed models, don't exactly play out in the UK from what I can see.
If you want the AMG Sport line, then you are limited it appears to a black interior, non of the various interesting interior colours options, forcing you to the SE route (so a possible upgrade if you want better wheels). Likewise, if you want a pano roof, you have to have this as part of a bigger package, with elements that you might not want (like improved audio system).
Comand Online has returned back to an expensive cost option (I had it included 3 years ago), which you have to get if you want the new larger screens. Talking of which, you then have to add another £495 if you then want both screens upgraded to the larger ones....total outlay £2000 (for both bits).
All the self drive/advanced (pre-safe and the likes) features still remain an option. Nothing appears to have made a step-up into a standard feature. I have for instance the speed limit reading in mine (was part of command) but appears to be part of safety package...so another lump of cash addon.
Things like the boot autoclosing, which Ford and Vauxhall now have as standard on many models, still not included as standard on a E-Class. I know I'm picking, but you expect a level of refinement.
Exterior colours are also reduced by the looks of it, certainly in the UK. The same 6-7 colours. I suspect other markets will have some further colour options.
For me, unless the dealers are going to offer larger contributions to offset these costs, I personally think after 15 years, I'm going to consider rival brands.