2 additional eyes for `n Omi !

Hi, at the beginning of the year, I want to go to Tüv with the Omi. Since I have given him, recently 2 cameras, I want to ask here, if someone has information about the admissibility ? There ́s perhaps any conditions, that the , from a certain speed must shut down or something. I is not personally known in the view, but could be. And one wants to avoid at Tüv yes every unnecessary stress. I thank already in advance, for your effort.