Originally Posted by stimpy

Driving an American rental across the border and renting from a Mexican office in CUN are two completely different things. When driving over the border at TJ, I pretty much always purchase Mexican insurance. However when renting in CUN, I never bother. If something happens (much less likely in CUN), I can always hold up a piece of paper that says my American Express card insures me, or I can resort to the age old remedy of bribing the officer an appropriate amount of dinero.