If you are running this specific legacy version, these "hot" mods from that era are often sought after: JazzyCat’s AI Traffic Packs:
Version 1.15 is a very old update (released around 2014). Because it is so old, searching for "hot" or popular mods for this specific version often leads to dead links, broken mods, or unsafe websites. euro truck simulator 2 version 115 1 mods download hot