I live in the woods and while the Crossfire has not played host yet my other cars have. After trying about every fix on the Internet including mothballs (which I bought in bulk, stashed everywhere and about killed me but did not bother them) and Cayenne pepper (which they seemed to like) I finally found a two part fix that actually works.

Fresh Cab (on line at farm supply places and Ace Hardware stores) placed in the engine compartment and trunk and sticky traps in all compartments including under seats. For the first time in years all my vehicles are rodent free.