What should I bring when I go to buy a car at a dealership?

Bring your driver's license, proof of insurance (or your insurer's contact info), and your preferred payment method or a financing pre-approval letter. If you're trading in, bring the title or loan payoff details, registration, and all keys. Proof of income and residence can speed up dealer financing. It also helps to bring your research: the VIN of the car you want, notes on comparable listings, and a written list of questions. A phone charger and snack don't hurt either.