Hi...i would like to know if the pano roof design was improved on a 2009 versus a 2005 .....thanks for any help....also i took a 2009 4.8 out for a test drive today and when i shut the car off and removed the fob the component that houses the nav cd was making the same noise that a computer dvd player makes when you insert a disc i found this odd...when i removed the nav cd the noise stopped...is this normal....thanks for any help...i put a deposit on the car and just want to be sure....thanks again.....rob



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