What does the ACC setting on an ignition switch allow a driver to do?

The ACC setting on an ignition switch stands for "accessory." This position allows the driver to use various vehicle features such as the radio, power outlets, and other electronic accessories without fully starting the engine. This is particularly useful when you want to run the radio or charge devices while the vehicle is parked, ensuring that you can use these features without depleting the car's battery excessively.

While the ignition can be turned on to activate all features with the engine running, the ACC setting specifically allows for limited functionality that avoids the need to start the engine, which can save fuel and reduce emissions. In contrast, other options may suggest capabilities that are not accurate for the ACC setting, such as functionality while driving, engine performance enhancement, or using features without the vehicle being in the appropriate state for accessory usage.