Lets face it: Most of us have a limited understanding of our cars. Maybe weve figured out how to program the radio, regulate the temperature, fill the gas tank. But when it comes to the really important things—how antilock brakes work, what to do if you hit a patch of wet leaves, how to clean your battery posts—were sadly lacking. Thats why weve asked car and driving experts from coast to coast to share their advice on how to be a safe driver and have a safe car. Heres what you need to know.