Ford 1.4/ 1.6 TCDI are Peugeot based and have their own well documented problems
2.0 TCDI is Fords own and the injectors are weak. Later shape also went back to cambelt with early failures - cam chain kit a must for the taxi fleet.
2.2 is the Peugeot based diesel found in Jags, Pugs, Citroens, Fords, Range Rover and Land Rover albeit in highly modified forms. My neighbours Evoke scrapes about 29mpg regardless of driving style.
Archaic 2.0 TDDI is the fit and forget engine. One time, at band camp, I didnt bother changing the oil for 2 years. It was still going on the original turbo at 380,000, written off at 420,000.
Older 1.8 TD was just awful.
VAG PD130 was great but let down for me by water pump and early turbo failure.
The 8v Fiat diesel can be found in many Vauxhalls but for whatever reason, they managed to f that up. The 16v version too - say 'swirl flaps' to any older SAAB/ Vauxhall owner and they'll shudder
The big concern with my budget is that the available mercs can hide structural rust.
The Stilo is soldering on. Will hit the 100k point next week.
I've even been looking at Doblos again... Will I ever learn??