Audi’s stepless Multitronic CVT is based on what it refers to as a variator. The variator is made of vanadium-hardened steel that is encased in oil and offers more durability than belt-driven CVTs. A manual gear selection mode is available and six simulated gear ratios can be selected. In the automatic mode, Multitronic calculates the optimum gear ratio with the aid of a dynamic regulating program, according to engine load, the driver’s preferences, and driving conditions.