The Audi A4 Ultra is a trim level of the Audi A4, the popular mid-size luxury car from the German auto manufacturer. It features a more efficient engine, more interior and exterior features, and a more refined styling than the standard model. The A4 Ultra offers improved fuel economy, with an estimated 26 mpg city and 35 mpg highway. It also includes a range of advanced technology, including Audi's MMI infotainment system, as well as adaptive cruise control and a head-up display.