The VAG-COM Diagnostic System (VCDS) communicates with Audi ®, Volkswagen ®, Seat ® and Skoda ® vehicles with a Windows based PC via the VAG-COM USB interface. It outperforms all other aftermarket diagnostic tools and provides dealer level diagnostics while granting full access to all systems. The VCDS has an extensive database that contains over 11,000 codes with descriptions that eliminates the need to look up codes.