Alex’s Autohaus and APR is pleased to present the ultimate Transmission Control Unit (TCU) Upgrade for the DQ500 7-Speed DSG / S-Tronic Transmission! This will fit the new Gen 3 RS3 and TTRS. APR’s TCU Upgrade dramatically improves upon the DQ500 transmission’s function, drivability, and performance through a myriad of enhancement and custom features. Normal […]