I took delivery last Wednesday and have used Autopilot several times successfully but have not been able to get auto lane change to work. I have it enabled in settings and I see the gray lines indicating the adjacent lanes on the display. When I signal the blue line in the direction I'm signaling momentarily changes to a dashed line then it goes solid again and the gray lines momentarily disappear. I've tried it about 20 times now, all on a major interstate with well marked lines and no cars in the adjacent lanes.