Norcold may have auto-temp models, but I'd never buy an RV with an auto-temp propane refrigerator in it.
FWIW, our rig's propane/120V Norcold unit has manually adjusted temperature settings using it's 5 position slider switch right there on the front. We only occassionally have used position 4 in extremely hot weather. We've never needed position 5 ... so far it has had plenty of cooling capacity in all outside temperature conditions. For our camping style, a residential refrigerator would not work at all.