PAC RP4-VW11 RadioPro4 Stereo Replacement Interface with Steering Wheel Controls for Volkswagen Jetta Golf Passat Tiguan - CANBUS Integration for Seamless Audio Upgrade (Perfect for DIY Car Stereo Installation & Factory Radio Replacement)

This is the exact product I needed.The project I was working on was replacing the stock stereo in my 2004 Volkswagen Jetta GLS with the JVC KDR840BT unit. I would likely have been able to replace the stereo using a simple wiring harness converter or even cutting off the stock wiring harness and wiring the radio directly to the audio cables for the speakers and amplifier. My concern was that I would not be able to properly use the steering wheel controls to change the volume and tracks on the new radio.The installation of this product is very simple for those who have any experience with simple wiring. You can solder the wires on, but I simply twisted them to the ones that came from my wiring harness with the ones on this interface and covered them with electrical tape.The sound I get from all of this is great (much better than the cassette adapter for my iPod) and the steering wheel controls work perfectly. There is a slight delay when changing tracks on my iPod that comes from the steering wheel control as compared to changing the track directly from the radio.One thing to be careful of is the space that this unit will take up, be sure you can fit this behind your radio or somewhere else, it was an extremely snug fit in my car.