When I had my 38 Contessa, I had several water leak issues, all documented here.
Almost a year has passed since I bought the Monaco Dynasty. It is 9 years newer than the Contessa, but it seems that in that time, the factory learned nothing from the leaks that affected the older designs. When it rains on an old coach, even as youthful as 2007, it still comes inside!
In order to determine the origin of the water that is coming in, I have started on the inside. There is a significant amount of water dripping onto the Allison control pad. If ever there was a place to absolutely ensure no leaks, this would be it! In the Contessa, I had to replace the Allison control pad when it started intermittent failures. I think (can't be 100% sure) those failures were due to its sealed surfaces permitting some of that moisture to get inside. Bad enough the leak rotted the structure. That was easily repairable, but the Allison pad cost me $1500 to fix. Then I made absolutely sure there would never be rain on it again. I took the window out and put Blueskin around the opening, then Lexel to seal the window in once it was back in place.
In this coach, I have removed the trim around the inside of the window, so as to get a look at what is wet. The top of the opening shows some water creeping along at the outside edge of the opening, and no wetness on the inside except where it crosses over, then the screw holes at the nearest 2 positions show some rust, and the drips from those positions fall right onto the Allison pad. Good news is that the opening in the sidewall is properly covered in a black, tar-like material that may even prevent the water from doing damage to the side wall of the coach. I don't expect to be removing the window to see for sure.
On the outside, there is some obvious caulking around the top of the window, so I think a previous owner has attempted to fix this. The caulking around the window appears good. It even appears to have been a good type of caulking, ie NOT SILICONE. Further away, however, there is evidence of openings in the caulking that is on the top side of the 3/4x1/2" cover strip that I presume hides the join between the front cap/roof and the sides. That caulking appears to be silicone. When this rainy weather stops, I will dig into that area to prove it is the problem area, then repair with Lexel.
Watch this space for progress reports.