My TT also has the Furrion but it can't be used to view the Invisbile trailer mode. I used the furrion all the time before I bought my new truck, But the invisble trailer is much better. And yes I use my invisible trailer and still see my navigation. The other good thing about invisible trailer is that it is not one the 9 second camera things. You can keep that view up for ever. Its way better than a rear view camera as it still shows you whats next to your trailer instead of just whats behind it.