I see on the Hyundai site that Forward Collision Warning and Automatic Emergency Braking are optional in the Elantra 2017 Limited model. ConsumersUnion highly recommended these two features in particular. I wonder if anyone here has these features? Are they trickling down from higher end Hyundai models? I wonder if the tech is reasonably mature and the hardware implementation reliable at this point? FCW ad AEB do seem highly desirable if they work as advertised.