accessed the service menu and changed the model to a UE75JU7000 series (HW is identical).
I do have a 120Hz Panel installed and everything does work though (auto motion plus, etc.).
My htpc is recognizing the TV as a 3D enabled one and the TV does show the 3D image - BUT: I cannot really pair my 3D glasses.
It does recognize the glasses but shows a battery empty symbol.
The glasses itself wont sync to the TV - no 3D image delivered....