I've tried again and again but this bus still doesn't work, can anyone explain in crystal clear English what to do? I've translated the readme but still doesn't make any sense, I have all the files laid out and installed it correctly, still doesn't work.
The first step is to download Helvete's Citaro Facelift from here.
Then you download Morphi's Soundpack for the Facelift from here and install it properly as instructed in the readme file.
Thirdly you should rename the just created folder to Setra_415NF
Lastly delete all the .bus files in the Setra folder and copy and overwrite everything from the here downloaded archive. After that, just copy the Setra folder to your Omsi 2 directory.
(I know, my English got a bit rusty, but it should be understandable)