The contrast stitching on the dashboard, shift handle and steering wheel is red, which is optional only when the interior is black IU. The extended leather kit is the advanced configuration of Audi car, in which the extended leather kit includes instrument panel, shift handle and steering wheel, with red contrast stitching, which is only available when the interior is black IU. Audi, a German luxury car brand, is characterized by four interlocking rings. Now it is a subsidiary of Volkswagen in Germany.