I took a chance and installed a USB/Bluetooth adapter, which was not listed for my car or audio system - W53828. This cost £52.50 free post. After receiving my trim tools from eBay the work began. I found a guide on the net on how to remove the trim to get to the rear of the stereo. First was the top vent then the passenger side trim near the heater controls. After removing the stereo, the CD changer port was empty so I plug the adapter cable in. A quick test with one of my USB memory stic