On ebay there are some MMI/AMI cables (which is the correct abbreviation?) that are for ipod, USB or 3.5mm phono jacks. When an ipod is connected does it also get charged? If it does does that mean in the wiring there are connections for 5v power and stereo audio? Ideally I would like a cable that plugs into the car and breaks out into USB and a 3.5mm audio jack in one cable. Is this possible? Would I have to make my own?