Renault trafic is a good bet I found mine great and very comfy, worst fuel consumption I've ever had though that was the 1.9 DCi it was having £10 everyday in that for just a few short trips, gearboxes are very prone too (as I found out with mine was chattering). Very nice though 
Does it have to be a 7 seater? If not we use Merc e classes 2002 onwards shape some have around 300k miles (no older than 53 plates) and they still drive good most of them. Good on fuel, quick and a nice drive 
I will say though don't be taken in by Renaults claimed fuel consumption for the trafics if you're looking at one of those, mine was never loaded with anything and it was using £10 per day, good comfy van though, nice to drive, good to look at, nice levels of kit 
Dont understand why the poor fuel consumption :-/
Ive driven a trafic before and i was suprised how good it was on fuel.....mind you it was only about a year old with a 6 speed box in it.
Thats one of my considerations.....a trafic is a 9 seater.....2 more than my viano.....so potentially more work for it

A 53 plate vehicle is too old to get licensed where i work unfortuantely....
Dont go and buy a new shape E class at the moment, Merc have an engine problem with all new merc diesels at the moment....injector failures.....the firm i work for has a 59 plate 2.2 E class.....its broken down 3 times so far.....all injector faults.