This week on Car Talk, "Alternator? We don't need no stinkin' alternator!" Suzy is about to embark on a drive across Mexico in her Vanagon. Will Tom and Ray have any advice on how to prepare, aside from a pre-trip screening of "Treasure of the Sierra Madre"? Elsewhere, Michael stands to inherit his father-in-law's Lincoln, if he can figure out why it's stalling; Henry needs to know if he can still rely on his coat-hanger wielding, shade-tree mechanic pal Sammy, after a brake job failed to make Henry's Colt stop pulsing; and on Stump the Chumps, did Erica spring for a new transmission or a bungee cord to keep her Forester from popping out of gear? And, car dealers once again battle it out with members of Congress for the dubious title of Least Honest Profession. All this and lots more, this week on Car Talk.