Mercedes e320 Bluetec Radio issues
Trying to diagnose radio issue on a 2007 E320 Bluetec, 6-disc CD changer is currently jumped with a fiber loop, FM/AM audio working fine. When switching to AUX audio instantly met with loud buzzing noise with or without 3.5mm Jack plugged in. (Phone recognizes it’s plugged into aux). The car also has hands-free bluetooth in the center console, and no iPod plug other than the 3.5mm aux.
Thanks!


