Ugh, just did the work around my rear window over the last couple of weeks. Lower rear corners were pulled away from the body enough for water to get between the 2 pieces of the pinch...wicked all the way down to the tail lights ( this is on a Duster ) and I had to replace the trunk gutters on both sides.
Take a look at the pinch area, mine was all wavy almost all the way around so I straightened it with a hammer and body dolly and filled the edges with seam sealer so even if it does leak again, it wont suck water between the sheet metal.