If you're using the radar cruise it will come to stop at highway speeds, so it does have the technical ability.
Looking at the website Driving Assistant Pro package, "Emergency Stop Assistant to bring the vehicle to a stop in case of a health emergency; and Evasion Assistant to assist in critical approach situations by reacting to vehicles and pedestrians in front of you."
Under standard features, "BMW's Active Protection System detects imminent accidents, then prepares by automatically pretensioning safety belts, closing windows and moonroof, and activating post-crash braking; includes Fatigue and Focus Alert feature" . So after a crash it'll brake, so we've got that going for us... which is nice.
Video under the user manual section of BMW for owners site says starts breaking which you can finish yourself.
I don't see anywhere where is says will stop. Did we read what we wanted to hear?