The invention relates to an electric motor-driven motor-vehicle vacuum pump, having a drive shaft which has, in particular, two bearings and extends with a shaft stub in a rotor which is connected fixedly to the shaft stub so as to rotate with it. The dishwasher appliance includes a chamber for the receipt of articles for cleaning, and a door for selectively opening and closing the dishwasher appliance, the door having an interior wall and a bottom. A second insulating layer is formed on the first insulating layer so that the trench is filled. A scoreboard has receiver to receive information from the transmitter and display that information, such as lap speed and ranking, according to a desired format.