The drivers seat is very unstable when turning corners. there seems to be 2 blocks underneath your butt and while turning corners or when your weight shifts in the seat they, shift, pop up, and move. you can hear an audible pop noise when this movement occurs. i've taken this to lincoln of troy (248) 905-6260 in troy michigan on 2 occasions to have this corrected and so far they have not been able to correct the problem. i'm scheduled to take this in for a 3rd time tomorrow. it's very unsafe when your turning a corner and your seat starts moving. this could very easily lead to an accident. the vehicle currently has about 6500 miles on it and this has been happening since about 4000 miles.