Hi All hope some one can help. I have installed a Parrott MK9200 in my 2004 XK8 I have spliced to wires into the cd player wires and used the Grey/black & grey to connect the phone up sound plays ok but I must confess its not very loud , My main problem is when you make or receive a call there is a a back round noise that is so loud I can only just make out what anyone is saying this seems to be there even when the car is not running I have rechecked the wires and change the speaker wires around for the phone is case I had them the wrong way around but it has made no difference any ideas ?