: The "1.39" in your query indicates the mod is designed for a version of ETS2 released in late 2020. Using this mod on newer versions (like 1.40 or later) may cause crashes due to the significant lighting and engine changes introduced in later updates.
: KapitanKriechbaum released a popular DAF XF E6 Paccar MX13 Engine Sound Mod that was specifically adapted for both v1.39 and v1.40. : The "1
The information regarding "DAF 2021 ОГП Рылен Прнмепшхк V1.0 1.39" appears to refer to a specific , likely a truck or sound modification adapted for game version 1.39. : The "1