I just bought an 1989 Mondial t cab. Runs great. When I was doing the checkout button-pressing exercise with the sales guy, we came across the button on the top dash panel to the left of the gas cap opener. It is labeled with an icon that looks like a partially opened folder (think PC) with a curved arrow zooming away from it. It's not an aftermarket thing because the color and style are exactly the same as the gas and engine/trunk release icons. Anyone know what this button is supposed to do? Thanks.