Our you talking about the slide out unit? Is the slide floor raised up in relation to the main coach floor? If so I would get the 5er back to the dealer and have them readjust the slide so it sits level.
I believe there is a means to level the slide out unit in relation to the coach. This is in the Lippert manuals and you could do it but the dealer should since it is under warranty. I have attached a link to Lippert for you.
http://www.lci1.com/index.php?option...d=54&Itemid=66
I know how to do it since I had to adjust my 4 year old 5er, when it went out of adjustment from the jack screw nut coming loose. I adjusted the unit last year and then traded it in for our 2010 Cougar.
Good Luck.
Jim