You're looking for information on the OMSI 2 addon Doppelgelenkbus AGG 300. Here's what I found:

The developer used official support from Van Hool to include original engine sounds and detailed textures.

: Features true-to-life sounds, various door types (interior swing and exterior sliding), and LCD target displays compatible with all OMSI 2 maps. Just Flight Safety Warning: Free Downloads vs. Official Versions

: A 25-meter puller bus where the engine in the front car pulls two trailers .

: The first fully functional 25-meter bi-articulated bus in the game. Puller Drive