I bought the Cologne-Koblenz Scenario pack but when I try to open a scenario a message advertise missing same wagon (Hbbins). I bought the route before the TS edition with it, so i don't even have the BR155. I cleared the cache and I tried to re-download the route but I can't find the wagon or the loco
If you mean https://store.steampowered.com/app/500216/TS_Marketplace_Kln_Koblenz_Scenario_Pack_01_AddOn/ It does state it has requirements "Requiring Köln – Koblenz, ÖBB Sgns Hopper Pack, ÖBB Rnoos Wagon Pack and ÖBB Sgns Container Wagon Pack"
Regarding the BR155 it was given away to buyers of TS2016 in a scheme called TS Rewards and subsequently, like all the other TS Rewards items, it was supposed to be included in updates to the route it was for- Köln to Koblenz in this case. I missed out on some of the TS Rewards goodies but I picked them up eventually just by e-mailing Dovetail and asking nicely. Include a list of the DLC you already have to save them asking.