I went through the same thing last week. I repaired mine by using the search on this site and found many cases exactly as mine and yours are. The repair involves removing the five screws in the trunk to the latch cover. When uncovered you will find a rod extending from one side to the other attached by a rivet on each end. This bar should move up and down freely. If it will not, take a screwdriver and pry the where the rivets are just enough to loosen them and free the bar. After doing this, I could then close the trunk easily by using the backrest as mentioned in other replies.