The knob selector that is in my 2014 RR Sport Supercharged won't stay down when pushed to select Auto Terrain Response. When I press the knob down, the dash indicates that the Auto mode is selected, but the knob does not stay down. When released, the knob rises and the General Terrain Response is indicated on the dash. It seems to be a mechanical issue with the knob. Does anyone have experience with this symptom? Are there instructions on removing the console to have a look under the knob?