Unfortunately I don't have any experience with any of the diesel BMWs at all, I don't even think they offer them over here stateside.
I do remember diesels all makes and models basically being the way to go for everyday cars back in Ireland and England with how cheap the fuel was, your best bet might be to check one of the regional forums ether on here or another site to see if you can find anyone else with one.
Best of luck.
https://www.2addicts.com/forums/forumdisplay.php?f=569