The trunk release button is located on the inside of the trunk lid. It usually has a small symbol on it, such as an arrow pointing down or a keyhole icon. When you press this button, it will pop open the latch and allow you to open the trunk from outside. To make sure that your car remains secure when not in use, there is also typically a lock built into the same area of the trunk lid which requires a key to unlock it before access can be gained from inside or outside of your vehicle. For added convenience and safety, some vehicles may even have an interior control for releasing and locking the trunk without having to insert keys each time.