The invention starts with a wiper arm with at least one fan nozzle through which wash water is sprayed on an as-needed basis in a fan stream onto a part of vehicle window lying in the wiper direction in front of a wiper blade, wherein the fan stream hits the vehicle window in the area of an impact line. The power electronic devices are mounted to the base plate through the direct bond copper. A linear noise image that represents linear noise components in the Y direction is generated, by extracting linear noise components from the reduced image. The search index is then used to identify ones of the data objects that satisfy the transformed search query. Respective plane portions of a front case 2 of the display part and a front case 3 of the operation part are made mainly of a metal material, and at least hinge parts 2c and 3c, which are formed on the front case 2 of the display part and the front case 3 of the operation part, are made of a resin material.