Originally Posted by Bill

While this is good advice, you don't need to get carried away with it. In the old days - say the 1950s - precise levelling was important. But more recently, the manufacturers have figured out that this is a pain. In particular, the Norcold manual, or the Norcold web site FAQ, says that the refrig should be level within 6 degrees of level front-to-back. Since the refrig is mounted sideways in the TM, front-to-back on the refrig is side-to-side on the TM. The tires on the TM are about 90 inches apart. If you run the math out, 6 degrees on the refrig corresponds to the tires being about 9 inches out of level. It is hard to be that far out of level!

On the Dometic web site (Dometic and Norcold build very similar products, and TM has used them both), it says "When the recreational vehicle is stationary it must be leveled to be comfortable to live in... So once more, before you start the refrigerator, make sure the recreational vehicle is leveled to be comfortable to live in." In other words, if the trailer is level enough that you don't lurch as you walk down the hallway, then that is plenty level for the refrigerator.

Bill