Had a Passat Tdi 110 for 3 years and 80k – loved it. Went to private car after that. Wanted the 130hp Passat estate, but no VW garage in my region would budge much on price as it was a new model, so I got an Audi A6 130hp Tdi instead (got a great deal on their new model). The A6 has been awesome too. I get 55mpg average, 65mpg on motorway runs. Same engine as a Passat. Variable servicing means that I go 20 months between services which are not that expensive anyway. Factoring in the long service intervals, this works out very cheap indeed.
I had a Mondeo diesel estate on hire (the previous model to the current one). It was a dog! The engine was not gutsy and the handling was unpredictable. By all accounts, the new model is a vastly better car, but i’d be sceptical about the powerplant.
IMHO the VAG 1.9Tdi is the finest midsized power plant around. Fitted to so many cars, it is a complete winner.