I just installed a RNS-E 8E0 035 192 D in my B6 with Bose sound, i notice there is a low humming sound coming from the navi unit, you can cover it up with volume, but i want to know why's it doing that? wrong connection? I bought the unit on e-bay with all connector, radio removal tool, GPS antenna and antenna adopter, but the connector has 4 set of plugs and also the antenna adopter doesn't have a place for the diversity antenna to plug in. I understand i need VAG-COM to reconfigure the unit, what do i tell the dealership i need done? I know this is a bit long, i'm new to this forum. Thanks to all.