I've owned my MKC for one year. After about 6 months it started making a "clunk" sound with a slight shudder or lurch after backing down the driveway when shifting from R to D on a very slight hill. Dealer downloaded some fix codes but problem continues and is getting worse. Now happens on level ground when car is cold. Seemingly when car (transmission or engine?) are well warmed up the problem is not noticeable. Seems like the transmission is trying to start in 2nd then shifts roughly to first. Dealer seems mystified. Any one else with this problem or solutions?