we have sprinters and transits 315 cdi,s a 140 lwb transit and the 200 bhp transit jumbo, all bought new, and pretty well looked and to be honest i would say we have had more issues with the transits, the 200bhp transit is just 2 years old and we guest its been of the road for 3 months in that timed with gearbox issues. the sprinters are good not to many issuses but oner critisism is the metallic paint is so thin any marks on it shows, its that bad the paint has worn through on the door seals on the front and am not kidding. back up wise merc would seem to be better, i think the ford transits seem to have that many variants that the parts avalibilty are a issue