Sealed thumbwheel

An operating element having a thumbwheel, wherein the thumbwheel has an operating lever, which can be rotated about at least one first axis of rotation by up to 30° relative to a zero position, a mounting box with a light guide, wherein a point of intersection of the first axis of rotation with the thumbwheel is formed within the mounting box, as well as an integral sealing system having at least one seal, wherein the sealing system and the mounting box are produced so as to be connected to one another by a substance-to-substance bond by a two-component injection molding, and wherein the mounting box has injection channels for injecting a material of the sealing system, in which corresponding injection channel connections of the sealing system are formed, wherein if more than one of the at least one seal is present, then the seals are connected to one another via the injection channel connections, and wherein the at least one seal forms a bellows, which partially surrounds the operating lever along its longitudinal axis on contact surfaces, wherein an operating head of the operating lever partially surrounds the bellows in the form of a projection along an axial position of the contact surfaces, whereby the operating lever can be moved in a translatory manner along an axis of its zero position and whereby the sealing system comprises static seals at points of intersection to the light guides.