Sorry, I misunderstood too. Leveling front to back for the van or the fridge since the fridge is mounted sideways. So on your picture of the level, you would want to move your tape lines in to 3 degrees.
I go with exactly what the summary on the RialtaInfo page says; if it's not level enough for me to sleep, then the van has to get moved somewhere else. I don't worry about leveling for the sake of the fridge.
I bet it still works in your driveway if you wanted to have it running on lp for some reason.