hi there I'm a newbie here so bare with me on my questions, I have a 2005 c220 cdi, the head unit in the car is the NTG1 audio 20, it has the connection for the Bluetooth in the arm rest but I have the old connector so its no good, anyways the cd on the unit is broken and it dosent have a multi changer so stuck with radio. can anyone point me in the right direction on a upgrade weather a newer merc head unit would go into it? so I can have Bluetooth phone connectivity mp3 and dvd if possible all with keeping rake functions? if not what have people been going for and can I get all the stuff in one place, sorry for the long rant but ive got Radio for goodness sake, please your help will me much appreciated....