PAC C2R-VW2 Factory Integration Adapter For Select 2002-Up Volkswagen Vehicles Keeps Data-Bus Intact for Vehicle Service & Emissions Testing Built in SWI-CAN Data controlled RAP accessory output wire Data controlled parking brake wire Facilitates replacement of a factory radio with a navigation radio while retaining the factory-installed amplified audio system (if equipped) Use with an steering wheel interface module to retain functions of all factory controls Keeps Data-Bus Intact for Vehicle Service & Emissions Testing Built in SWI-CAN