Hello and welcome to the forum. If you haven't got a Pre-Delivery Inspection Checklist already, I would suggest that you go to our Keystone Question section of the forum, find and download the PDI which is available for our members to use. It is in the form of a "Sticky" at the top of the column.
After you have downloaded it, read through it and become familiar with it. Take your time going through the unit and make sure everything meets your approval before you sign anything. Insist that you are shown how everything works - remotes, etc., and you are shown the location of the water pump, HW tank shut-off valves for winterizing, all of the drain pulls, and manual over-ride access points for all of the slides. It's better to ask now than to look for or ask about later. Again, be thorough and take as much time as YOU need.
If anything needs repair, adjusting or replacing, get it done now or make sure you have a written record of what will be done and when.
You are spending a considerable amount of your money on your new "toy" so make sure you are completely satisfied with what you are buying.
If you cannot find the PDI on the forum, send me a Private Message.
2008 Cougar 5th Wheel 27RKS
2005 2500 GMC Duramax