This Radio Replacement Interface for select 2002 to 2015 Volkswagen vehicles with CANbus, comes pre loaded with amplifier retention and SWC software to provide a plug and play solution that allows you to replace the factory stereo with an aftermarket stereo and retain the factory amplifier, steering wheel controls, data controlled accessory and navigation based output signals, rear seat entertainment system activation |if equipped| and other features without cutting the factory wiring to save time and money during installation.