Soundmatch - Aux-in/Usb port added to Vw Golf 5. Controls via factory radio keys or steering controls. So you can maintain your factory radio and have more options to play your music
Aux Cable Adapter Switch For RCD510 310 VW Golf Gti R MK5 6 Jetta Ba | eBay
AUX Port Socket For VW RCD510 RNS510 Golf Mk5 Mk6 Jetta Eos Standard Factory Fit | eBay
Audio solutions
Amazon.com: AUX Car Switch + AUX 12 pin Connecting Wire Harness Cable | Compatible with VW Volkswagen Bora Jetta MK5 MK6 Golf Passat Scirocco Polo EOS Tiguan CC Beetle Vehicle Radio | 3.2 ft : Electronics