Can I ask you guys a quick question, is probably buried in the many head unit posts but I have a 2006 280 (R171) with a standard A20 which I replaced with a Kenwood DNX 875S. I used the Metra 40-EU10 Fakra antenna adapter cable mentioned by many but resulting in no FM/AM radio reception. Had no issues with original radio. Metra has a powered equivalent 40-EU55 Fakra adaptor cable, would that be the solution as Kenwood has a 12V blue antenna control wire? I have the standard antenna, no other mods. Thanks a lot in advance.