I have the symphony 2 double din headunit which has the built in 6 play cd unit , What is on the back of this by means of plugging in a connects 2 etc ? as want to connect my ipod or is this a no chance situation ... As i know the connects 2 plugs into tghe changer port on back of HU but as i dont have an ext changer will there be any Aux plugs , apart from the obvious of changing HU to something else is there anything for this , If i change the H/u is there now things on the market to keep the display in the dashpod with an aftermarket unit ? as i remember when i had my TT back in 2004 when i changed to a pioneer mp3 unit i lost all track/station info on dash pod ?????