Got Starmate 4 for Christmas this year. So I took it to Best Buy to get it installed via the "direct fm" method. For those who don't know, thats where it's hooked up directly to the antenna line so there is no outside static you'd get transmitting wirelessly. When completed I could hear my satellite radio but there was a constant buzzing. But it was clear when they would unplug the fm direct part and just transmitted wirelessly. The installer said he's installed over 100 of these radios and this is the first time he's seen this problem. Anyone else with a mazda 6 have this problem?