I have acquired a 1991 300 SL. It has had the soft top down for many years and has the hardtop on when needed. At some point before I got the car the trunk had a lot of water in it. The drains were stoped up. It had sat unused for 2 or 3 years. I have put a new battery in and the windows, top and roll bar are not working. For a very short period of time (1 or 2 weeks) they all worked and then went off. I’m wondering if I have a ground issue or a greater problem. Does anyone have a thought as to where to start looking for the problem.