Have you thought about a Ford Mondeo? They do a diesel model, have a huge boot, have European styling and they're made overseas.
If you weren't after something European, I would recommend the Ford G6 eco boost. It's their new four cylinder engine, as much grunt as the 6 cylinder but much more environmentally friendly ( can you tell we just bought a new car?! All the research is still fresh in my head!!) the boot is massive, seriously I could sleep in there!!
I think you might have trouble finding all of that in a manual, but others might be able to help!