I want to replace the GS300 Lexus CD Changer for one that decodes MP3. Alpine makes one (Alpine CHA-S634) that sells for $299.00 on Crutchfield but $215.00 on eBay. The Lexus 6-disc CD Changers are selling for $275.00 on ebay.

Soooo, I would like to sell my changer and install the Alpine. Does anyone know if there are any proprietary connections? Or is it as simple as swapping out a hard drive?

Thanks in advance.