VCDS, developed by Ross-Tech, LLC, is a powerful diagnostic tool designed specifically for VAG (Volkswagen, Audi, Seat, and Skoda) vehicles. It allows users to read and erase trouble codes, view live data, perform basic settings, and much more. The software communicates with the vehicle's onboard computer via a compatible interface, such as the VCDS HEX-V2 or the VCDS HEX-3F.