Great choice. I have the 220cdi in the E class and it is a lovely engine. It is so good in normal driving you will keep pinching yourself and asking -is this really only just over two litres. And MB estates, IMO, look fabulous and you cannot really tell you aren't driving a saloon (apart from the pleasure of having a rear window wash/wipe system).
I think Elegance is the right choice in many ways for an estate. The ride is better on UK roads and of course on the C class it also gives you the 3 pointed gunsights on the bonnet. Great. Enjoy.