A vehicle interface system comprises a steering wheel, a contact sensor system, a user input device and a controller. The contact sensor system includes a first sensor that detects first and second contact conditions at first and second predetermined locations, respective, with the first location being on the steering wheel. The controller selectively enters an input device controlling mode in which the controller determines whether the first and second contact simultaneously conditions exist, controls the user input device to change from a deactivated state to an activated state during which the user input device provides input to the controller in response to simultaneous existence of the first and second contact conditions, provides an indication of entering the activated state, controls the user input device to remain in the activated state while the first contact condition exists, and subsequently controls the user input device to return to the deactivated state.