I am a non-US resident planning to ship my car (foreign plated) from abroad into Miami late summer then drive to San Diego. So far so good. I then plan to leave the car in SD with relatives, return within 12 months , drive across the border into Mexico and re-enter USA, thereby conforming with the 12m max stay regs for temporay car import (as I understand them). My question - is this legal, feasible and repeatable on an indefinite basis?