OK I know there was a previous thread concerning the parrot car kit and issues with installing it with the factory HU. No one seems to be able to get the mute to work for the HU. It seems like there would have to be some way to get it to work with the NAV HU due to the fact that Voice Navigation mutes the stereo when it is giving you guidence. It seems like it would have to connect to a mute wire of some kind when it connects from the NAV computer. In case its not obvious I really want one of these car kits.