I'm currently in an F10, a high mileage driver in a 520 D SE, mines a 107k '11 plate, serviced as and when the car tells me. Even after all those miles it drives like I remember it did when new. The engine is fantastic, particularly when mated to the 8 speed auto box.
Can't really offer any useful info on the DPF for obvious reasons, but if you're worried about the engine on anything with 60-70k, particularly if its been mainly motorway, I'd say those worries are probably unfounded.
I've got several colleagues running 5's (both E60 & F10) and we've all been delighted with them. A couple of the guys have 3's (318 & 320) and there have been issues with the flywheel on those (replaced under warranty) which might be an indication of some issues.
With only low weekly mileage you'd probably get more enjoyment from the petrol version, the diesels are definately the best choice if you're going to up that. I'm getting 50+ mpg out of mine.
Edited by Baffled_Bloke on 21/04/2014 at 19:48
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