What car - Diesel motorway muncher, radar cruise, for 10k or

[RikJonAtk]

I've been running my 2007 350z up and down the motorways a lot for work recently and feel the need to swap for a barge.

I want a diesel auto with radar cruise. 10k budget (Petrol maybe, but it needs steady motorway MPG of 35 or more).

What ya got?