I will piggyback on this topic if you don`t mind. We had the same problem only the other way around. On our MKI we could not get the passenger side door to lock unless one held the key in the drivers or rear door in the locking direction for about 3-4 seconds. While doing that one could see the handle going to the locking position and then kind of "bouncing back to the unlock position. Again any idea would be appreciated for me as well