I have a class C bought a 2001 with 5000K on it. Got it from a dealer with a 90 day warranty. After first trip and HVY rain found water pouring in for years in the front window (hate that window). It had rotted everything on the bed and front near window. Dealer had to replace it all 5000.00 under warranty because it was a health and saftey hazard. So now I keep everything sealed up and check it all the time. I also have cracking on my seals all the time in the same place you have your leak...I seal that part 2 times a year due to flexing. As another reader wrote its not pretty to seal that part but effective.
