I've got a 2007 Convertible. I've got water running and coming in at the side panel seem near the seat. Any thoughts on problem? Just leaking on passenger side.

 

This is at rear seat

 

I had that happen , put your topdown take a really bright light shine it under the hinge , if you see water there is a drain down at the bottom that is plugged .
Just ahead of the rear wheel both sides look along the edge about 6" in theres a like 2" gap poke a firm stick up there and watch it start to drain . I put a gold fish in took it to the dealer & they vaccummed both sides out$100.00 😳 So i now made my ownvaccume tube.

When topis up &you spray water onside by rear window you should see it run out of rhe 2" gap under i mentioned.