Thanks folks (interesting read). Was aware of front collision, but thought this was non-standard unless you order it.
Anyway, I think the interesting/important thing is that my car beeped like crazy when the person raced up my rear-end... it happened... so am happy for that feature whatever it is !
Alpine White (
) F10 520d M Sport Auto - 8 speed Auto/paddles - 350M 18" Dunlop Rear/Michelin Front RFT's - Deleted Sports Suspension