i want to put the stock mercedes CD changer in my 01 c240. the stock tape deck in there now says "cd" so does that mean that it already has the cable that i keep hearing i need or do i need to buy that as well (i couldnt find it in the trunk). i have seen a number of them on ebay selling for around 300$ but im rather skeptical especially if they were pulled out of a different car for some reason. should i order one new from the factory? and how much would that cost? and what is the product number for the one i need? thanks. i know this question has been asked a thousand times so i appreciate your patiance. thanks again.