The four door cars have drains in the bottom of the doors to expel water which gets inside the door. On a coupe I am not sure how it is supposed to get out but fact is it does not work very well. There may be a drain tube in there somewhere which needs attention from time to time.

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.