When using the built-in phone of my 2004 XC90 D5 (Belgium), correspondents complain about an "echo" : they are hearing themselves reapeating what they are saying when calling. Problem disappears when I pick up the handset, yet carkits are made to make phonecalls hands free in the first place I guess... maybe this has someting to do with the volume level, yet I have no idea how to change this (when making a phone call, I cannot change the volume level : if I push the volume buttons, it will display the volume level schreen on my display, yet no blocks show up, so as if the volume level would be at zero).
Thanks !
Frank
