okay, i lied.
Hi Howard; Thanks for those pictures. Sorry that it looks like the water intrusion started at the roof in the back starboard side. I didn't quite understand the issue in the rear starboard side marker light. Loose screw somewhere (as in a person?) . The tail light wiring didn't look up to the standards I'm used to seeing from LD. The 2001MB I worked on was screwed up, but I figured it had been done by someone paid to change some trailer wiring, or a previous-previous owner. Those bolts evidently holding your step on, certainly were the wrong type heads. I would expect rounded carriage bolt heads. RonB