We have that on our Jag. Tried it once, never again. Our new Mercedes has some kind of anti collision, lane swipe thing, heck not even sure. Hubby turned it off immediately.
Mine has the same kind of thing.The same sensors that control the "active" cruise control can,it's claimed,sense that a crash is imminent and,in some situations,applies the brakes itself.Not long ago I had a near miss (got distracted for a second) and that feature activated and probably saved me from a serious accident.I'm now a big believer in *that* feature but still not a fan of "active" cruise control.