I have a 2016 Cedar Creek and champagne. When it rains water comes in at the last rib on the ceiling runs down to the wall and over the slide and if you're sitting in the recliner you'll get wet. The dealer has pulled the air-conditioner replace the seal.
Sealed the four lag bolts that hold it on and regular water tested it doesn't leak. But when it rains it leaks. I feel the air conditioner is faulty and when it rains it has an avenue for the water to get in.