[newmanpc]

I have a question. I just picked up a 2003 e320 with an E1,E2,and E5 option packages install on the car my question is.How can i tell that the Sound system is a Premium Sound Package. I don't see any thing that has Harmon Kardon on it. I thought that A Premium Sound system was in fact a Harmon Kardon system. If it is not can can I upgrade it. Can you get a Harmon Kardon head unit and if so where is the best place


Thanks
Pete