Technically, you don't need any of it for it to work. The trailer assist was a fancy option that helps stabilize the trailer without weight distribution bars and with the help of trailer stickers the camera system helps guide backing up. I enabled everything as well and it does trigger a trailer assist light in the dash when a trailer is hooked up. Just remember, led trailer lights require an adapter like this. https://www.etrailer.com/Custom-Fit...2460hGJuKAnLZyy11Q6J3_UmWascCsuNYXUi3K8EFmqqI