Like you, I read all the available information (including the manual) and thought I was still missing something. I could not get mine to work at all (4 low, seat belt buckled, truck on steep incline). I finally talked to a friend that has the feature on his Ram and he helped me confirm something was wrong with my brand new truck. If the button is working you should see a message on the screen with some type of confirmation about the system status. It will either indicate the system is active or the system is not available due to the criteria not being met. I took it to the dealer and they ordered a new shifter switch assembly. My button was simply dead. Pushing it in any circumstance does not change a thing.