Modders frequently update engine sounds; if silent, check if a separate "Sound Fix" mod is required for version 1.38.
2.0 (often includes bug fixes and better textures over the initial v1.0 release). AUDI S4 V2.0 1.38.X
The Audi S4 v2.0 mod is designed to bring a high-performance luxury sedan experience to the trucking simulator. You can find and download this mod on community sites like ETS3Mods. Modders frequently update engine sounds; if silent, check
Specifically tailored for game version 1.38.x . Compatibility with newer versions of ETS2 (like 1.50+) is not guaranteed without further updates. Modders frequently update engine sounds