Do you mean tow/ HAUL mode? The Ford is equipped with a tow/haul mode feature that's very helpful when towing and especially helpful on descents. When in tow/haul mode you can tap the brakes on a descent and it will act similar to an engine brake allowing you to use less brakes and over heating them. In our previous MH, I found it helpful even when not towing in stop and go traffic as it changes the shift modes and helps slow you down without a lot of braking. But the tow/haul mode is designed exactly for towing.