I'm gathering stuff to install a new Xtrons unit in my 04 E53 and wondering if anyone has successfully used the factory microphone with an aftermarket HU? Reading other threads, it sounds as if an external mic is necessary with Xtrons HU (due to poor quality integrated mic). I was planning to run an external mic up the A pillar and across the roof to position it where the factory mic is, but thought if I could just tap into the factory mic, I wouldn't need to bother and it would be ultra-clean.

AM.

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E70 2010 3.0 M57 AT Titanium Silver with Black Leather
E53 2004 3.0 M54 AT Toledo Blue with Gray Leather
E83 2008 3.0 N52 AT Silver Gray Metallic with Black Vinyl
E46 1999 2.8 M52TU 5MT Black with Tan Leather 250K+ miles (Sold, but not forgotten)