I'll go a step further than staying on the dealer's lot a night or two or even a nearby campground. Instead, I recommend you plan a short trip - one week - around the dealer. Drive that motorhome; use every single appliance; open the awnings; not only do hookups but also use the water pump/fresh water tank and dump the tanks; use the dump cleanout, use the levelers, etc. Then you can do your circle and take it back to the dealer for help/repairs, if needed. Definitely don't leave the area right away. Enjoy!
Full-timed for 16 Years . . .
Traveled 8 yr in a 2004 Newmar Dutch Star 40' Diesel
& 8 yr in a 33' Travel Supreme 5th wheel