I have a W208 CLK  with an Audio 10 radio/cassette and NO CD changer in the boot. I was looking at a direct swap with an Audio 10 radio/CD head unit but am also toying with the idea of fitting a COMMAND unit. Ive been looking at a Command 2.0 out of a  E class but want to know how I go about checking if the part number from the command unit will sync with my CLK? Also, apart from the antenna what else would I need to buy to get it up and running if its compatable? Thanks in advance. Mike.