You probably use your car's key fob several times a day without thinking much about it. Press the unlock button. Press lock. Maybe open the trunk. But then there are the other buttons—or strange symbols—you may have never used.
Modern key fobs can do far more than simply lock and unlock a car. Depending on the vehicle, a fob can start the engine remotely, open the trunk, roll all the windows down, fold the side mirrors, trigger the alarm and even activate features without you touching the car. Here's what those buttons actually do.
