That's optical, no integration available. Either work with the setup as is or replace everything, head unit through to speakers. It's easy to spot optical, behind one of the trunk panels should be an amp with two orange fibers hooked to it. That you have a sub is why I am fairly certain you have optical. You will spend $1k in install and parts before you have even gotten an install as good as the stock system. There should be a factory iPod kit available for this car as it has MOST, not too terribly expensive and provides full integration. I'm just not sure if it works on the 2005s or only the 2006 and later.