To use the swap body boxes effectively, players often need the Krone Trailer DLC.

This review refers to a specific mod for involving a swap body (CSERÉLÉS) chassis for the Mercedes-Benz Atego (referred to as "ATERGO" in the user query). While likely a translation or typo for the "Atego," this mod type is highly popular for adding realistic delivery mechanics to the game. Mod Overview: Mercedes-Benz Atego Swap Body

Enables the use of Sebastian7870’s Swap Body Carrier system, which is a staple for this style of trucking in ETS2.