Have you ever gotten into a rentalcar and spent serious time figuringout how the lights and windshieldwipers work? That's true of your newcar, too, and you should make surethat you're familiar with all the bellsand whistles that come with yourshiny new chariot before you drive itoff the dealer's lot. And don't settlefor demos of simple things like rear-windowdefoggers and CD players. Ifyour new car comes with a fancyglobal positioning system, for example,make sure you know how itworks. Ask for a walk-through on featureslike remote keyless entry systemsand childproof backdoor locks,and make sure you know where thespare tire is and how to get to it.