It's now 10 months and 10000 miles into our ownership of our 520d M Sport LCI. Car is on 33000 miles in total and recently turned four years old.
Absolutely no issues to report failure/repair wise. The average MPG since ownership is an impressive 57mpg - the old F11 520d was at 43mpg.
A quiet August leads to more long distance journeys in September with Wales, Northumberland and then taking daughter back to Uni in Portsmouth. We have also booked to drive down to Southern Spain in January to get out of the British winter for 6 weeks.
Best features of the car are: Driving Assistant Professional where the radar cruise control can take the heat pain out of motorway jams, this mode can be "upgraded" to steering assistance whereby the car stays in the lane with input on the wheel (just a touch) about every ten seconds or so. The 360 degree cameras - it's a big car and these are superb when parking, reversing or on the motorway where they blind spot monitor with warning triangles in the rear view mirrors that light up only when a vehicle is there. The Android Auto for Waze and Goggle Maps works superbly and finally the Head Up Display which I now would not be without.
The first MOT is due in October when the AUC warranty expires so it will go back to BMW beforehand and then the decision whether to extend the warranty or not.
Overall an absolutely brilliant car - well recommended.