This invention relates to an axial-radial sliding bearing with polymer sliding elements. In addition, the operating device has a guide element, which defines an accommodating area in which the pushbutton element is at least partially accommodated and in which the pushbutton element is guided, and a capacitive proximity sensor with an electrode for detecting an object approaching the pushbutton element, in particular a hand or a finger of a hand. An endless ring for a metal belt is constructed by the above maraging steel. Emptying of the ashtray by tipping overrides and disables the tipping alarm momentarily. For example, the environment may provide a graphical user interface enabling the user to developprototype the MCMVDAQ sequence at a high level, by selecting from and configuring a sequence of MCMVDAQ operations using the GUI. The materials and methods provide that the barrier layers have good adherence to PET, even during and after the blow molding process to form containers from preforms.