I created single mod from few mods. Then edit almost all files and 3d files.

Now we have swap autoload jumbo body, autoload flatbed, forest body (not autoload), tipper body, animal transport body (autoload), tandem trailer and normal trailer. I added script for attacher joint because in the original mod was travel from left to right really limited. 

Jumbo, flatbed and booth trailers were edited extensively, maybe will not work with original krone swap body mod.
Forrest body is not autoload...

You need also:
-MAN TGX2020 v1.2.0.0
-autoload specialization v1.2.0.0

Tip: change Y key for Tool 4 to M or something else in settings and you can open jumbo covers on trailer independently.

//Edit: mod is dependant on truck and autoload specialization. If you try with newer versions of dependant mods, you may break this mods...

Credits:
Bring together, editing, scripting, remodding...: GamerNameUnkwnon
MAN TGX v1.2.0.0: BD_Modding / Sebastian7870
KronePack: BD_Modding/Sebastian7870
Flatbed: BD_Modding Bearswear
aPalletAutoLoader v1.2.0.0: Achimobil
fixAttacherJointRot: SOB Modding/Converted by DKFarm