Rear leak on 199

What year is the 190...did you buy it used or new from a dealership?  If purchased used / new to you it does not come with a warrantee and I had a small leak at both bottom corners of the rear window every time it rained on my 179 that would puddle on the kitchen counter top.  At the time my trailer was still under warrantee and the dealer fixed it.  They said an internal seal in the window was not seated properly which was causing the leak.  After they disassembled and reassembled the window it has not leaked.  If you are wanting to do the repair yourself, you may find some instructions on YouTube.  Hope this helps and enjoy your 190.