I know this has something to do with traction control and my Murano has this feature. There is a button on the left side of the dash (down low) that says VDC Off. How do you know if it is off or if it is on? There is no "ON" button. It doesn't say anywhere. Is it automatically engaged unless I do something? Does that mean I have been driving with it on all summer? Does that matter? Any help would be appreciated. This is my first winter with the car and there are a lot of features I know nothing about.