What is the step button on a 2008 Chrysler Sebring?

The "Step" button on a 2008 Chrysler Sebring refers to the automatic transmission's manual shift mode. It doesn't actually have a "Step" button labeled as such; instead, it's usually part of the gear selector itself. By moving the gear selector to the "+" or "-" position (or sometimes a similar position marked with numbers), you engage the manual mode. This allows you to manually shift up or down through the gears, rather than letting the automatic transmission choose the gear.