I've never seen the ability to disable/enable this feature. Assuming you have an SLT or RT it would probably be in the EVIC, in the Personal Settings. You can get to it with the key on & the trans in Park, click the top left button on your steering wheel a few times.
Are you sure your pushing/pulling the button far enough? If I push/pull lightly on mine, they go up & down like normal. 1/2 way down I can feel the button click & it goes into auto up/down mode.
Are you sure your pushing/pulling the button far enough? If I push/pull lightly on mine, they go up & down like normal. 1/2 way down I can feel the button click & it goes into auto up/down mode.