I picked up our brand new, fresh from the factory 36FB15 yesterday. After driving home for about an hour, I stopped at a rest stop. When I inspected my wheels, I noticed what appeared to be black streaks on a couple of my rotors. Having read alot of axle topics on this forum for the last 4 months, I believed that I had leaking grease seals on my wheels.
I decided to turn around and go back to the dealer.
At the dealer, they inspected the rotors and agreed that it appeared that I had grease on the rotors. Although one of the rotors had seemed to clean itself up nice and bright.
They then made the statement that you hate to hear: "This is the first 5th wheel we've seen with disc brakes".
I took a break while they called Crossroads and Lippert.
After about an hour, I was happy to learn that I didn't have a problem. Turns out that there was not any grease on the rotors. Lippert coats (paints?) something on the rotors when they manufacture them. Since they don't know how long the unit might be sitting on the dealer's lot, they don't want the rotors to rust.
My unit had about three hundred miles on it and hadn't worn the coating off completely yet.
Just thought I would share this information in case someone else picks up a new unit and see the same thing.
So far the only problem I have found is a bad crimp on a 12 volt wire. It only took me a couple minutes to correct.