How to enable Developer Console in Euro Truck Simulator 2
While your game is not on. Locate the game's data folder.
This tends to be in your documents folder.Open the Euro Truck Simulator 2 Folder.
Open Config.cfg.
Search uset g_developer "0"
Change it to 1.
Search uset g_console
Change to 1
Save & Start game
You should now be able to press ` to open the console.