I have a 2-button device on the driver's door. The first button shows a seat with 3 lights and I know this is for the heated driver's seat. The other button shows a seat with a capital R and one light under it. I have no idea what that button is used for. When I press that button, the light under it glows for approximately 10 seconds and shuts itself off. Anyone have an idea of what this button is supposed to control?