With the new Timetable on RT, I have noticed you can only drive S2 services on the older 2017 timetable.
S2 services are exclusive to BR 182 now. S1: BR 1442 S2: BR 182 + Dosto (182 required) S6: BR 1442 S8: BR 143 + Dosto (RSN required)
Absolutely bad from DTG I don't buy the BR182 so that I can drive to Dessau, even though I bought the route for the proud price of 30 euros! Either they fix it or I won't support this anymore! - Opinion from a disappointed RT player who was really looking forward to the Preserved Update
Rapid Transit and the 182 have always been separate DLC. If you want the 182, you had to own RT and then buy the 182 separately. I don’t think that’s unreasonable and nothing other than that has ever been promised as part of this update.
Just choose the old timetable and you can always drive a 1442 to Dessau. Both sets of services are available in the menu.