Mod: Inspector
im using this mod as well, in a multiplayer game, it works well :D, with one exeption, it dosent show fill level on trailer (when you are not in the tractor), if filled with wood chips (it does for all other fruit types)

i do have a suggestion though, could it ignore non filable stuff, like the front weights and dolly's perhaps?? (im using a mod, to drive with 2 trailers on my MAN, but it only shows the load on the first trailer, and the dolly)