A drilling mud clarification or reclamation system is provided. The device may evaluate the first portion of program code and the second portion of program code. In order to combine numerous functional elements with the supporting doorframe into a prefabricated modular unit while increasing the stiffness of the motor vehicle door, particularly below the window sill, the region of the supporting doorframe lying below the window sill is provided with a large surface mounting support metal sheet which accommodates functional elements.