It is not a normal train for the S1 to Bludenz. Today the OEBB will test some BR 612 on the route. So you will see some of this trains. You drive one of it as a S1 from Lindau to Bludenz.
Required addons: Three country corner route, BR 612 (RSSLO) and the Taurus-Lok (HRQ).
Of course this scenario has announcements.
Good journey.