Do a real good pre delivery inspection. check fit/finish on all woodwork/cabinets, have the dealer instruct on all system operations and appliances. Make sure you turn on refrigerator and use elec and gas options, turn on heater and AC units and make sure they work, take a TV with you and make sure you get reception to all tv connections that do not have a TV attached, check the vacumn cleaner and make sure a bag is in it (unit is in the cellar) check water filter to ensure a filter is emplaced, again, unit is in the cellar. Check battery boxes to ensure you have 2 batteries, extend the awnings and slide outs to ensure they work, extend the antenna and make sure it works with the TVs. If you have a satellite, turn it on and make sure it works, turn the dishwasher on (if you have one) and run it thru a full cycle. Turn on washer and dryer and run through a full cycle. Check paint on the outside, look down the side of the coach for overspray, clear coat not applied correctly, paint runs, etc Check the roof to see if the roof fabric has wrinkles (no wrinkles should be there) fill the grey and black tanks and go through the process of draining and flushing, fill fresh water tanks and turn off "city" water to see if water pump works, turn on hot water heater to see if it works (use gas and electric) Check if Gas Bottles are full. Check tire pressure. Have them instruct you on the operation of the Lippert Level Up system. Check to see if the fireplace works. I am sure there are a few more things but these should help you check your new unit out.