It works fine for me, but it's not enough to enable the Sifa (rotating switch), you have to also switch the fuse on (bottom left corner of the fuse panel).
Sifa is not working. The switch is in the correct position, but the control in the HUD is not shown and it is not activated. One of those bugs where DTG completely fails to deliver quality. How is this possible? EDIT I see it now, there is the Sifa switch but also a fuse. Somebody decided to set the fuse to off. For a keyboard command you would expect that it will set the fuse as well but it does not. Since there is no manual, you are left in the dark on how to do this. As afar as I remember, at other routes you do not need to do this. A bit of consistency would be helpful. What a mess. I am not happy.