I have a few questions regarding the interoperability of the stereo and the navigation system (the color one):
1) Can you use the sound system and the navigation system at the same time?
2) If so, is the volume of the radio lowered every time a spoken direction is given by the navigation system?
3) What type of information is displayed on the color LCD for the radio player, the cassette player and the CD changer?
4) If the sound system is being used, is the color LCD always on regardless of whether the navigation system is being used or not? If so, isn't this annoying, specially at night?