Hey all! I just purchased a 2004 slk32 amg. love it. i have some questions if anybody is familiar with the audio system. I was told it is a bose a2 system (instead of the y91) so if i wanted a new head unit all i need was a cable to the bose amp instead of a full rewire. Can anybody verify this? If that is the case, does anybody know what cable it is? the install place wants $150 bucks just for the cable!!! Thanks!