I know everybody Is simply going to point you to the pre delivery inspection check lists here...
http://www.montanaowners.com/RVRelatedLinks.html#pdi
I will list the things I found wrong with mine to maybee help you.
My windows... the ones that crank open did not seal shut all of the way
The refridgerator did not work
The under pinning to seal up the bottom has some gaps between it and the frame in some places.
No o-ring the black tank flush connector, it needed the simple garden hose o-ring.
Some plumbing leaks, the cold supply for the sink and the drain in the bathroom.
There was a small hole in the awning.
A cabinet door was scratched pretty badly
Remote was missing.
Some of the trim work in the bathroom looked shoddy.
The kitched table had a severe wobble.
The rear ladder needed to be sealed better where it screwed to the back cap.
Youll only find this stuff if you take your time and look at everything. Luckily we spent the night at the dealership... twice to find it all. Lazydays did make everything right. It did take a little while but im all good to go now.
Hope that helps you!
Ren