Audi CAN Interface 2002-2013. This interface will Provide accessory power (12-volt 10-amp) and Retain R.A.P. (Retained Accessory Power) for an aftermarket radio that is lost when the OEM radio is removed. It will also provide navigation outputs (reverse/parking brake/vehicle speed sense). Harness is prewired for the AXSWC (AXSWC sold separately) which retains the OEm steering wheel controls (Aftermarket radio must be SWC capable). Used in non-amplified systems or when replacing amplified system.