Check the listing for details. PAC RP4-AD11 2004-15 Select Audi models, SWC. Condition: New. Listed at 134.99 USD. Product highlightsinstall an aftermarket receiver in select 2004-15 Audi vehicles works with amplified and non-amplified systems retains your steering wheel audio controls and factory amplifier and sub (does not retain fader) supports RAP (Retained Accessory Power); provides a 12-volt switched accessory output supplies VSS (Vehicle Speed Sensor), illumination, reverse trigger, and parking brake outputs for navigation receivers warranty: 1 year What's in the boxRadio replacement module (for Audi) Wiring harness (RP4-AUDI11-HAR-A) Wiring harness (RP-AUDI11-HAR-B) SWC harness Instructions About this itemWritten by Crutchfield's Bob BihlmayerPAC RP4-AD11 PAC's RP4-AD11 wiring interface lets you replace the factory radio in select 2004-13 Audi vehicles with or without factory amplified systems. You'll retain your factory steering wheel audio controls and the use of your factory amplifier and subwoofer (if present). The interface also supplies the databus-driven output you'll need to keep your retained accessory power (RAP), as well as the outputs you'll need to install a navigation receiver. Important Note: When you install a new car stereo, you'll lose the ability to fade from front to rear if you have the Bose or Symphony audio system.