Just got done test driving an X5 today, and had a couple questions. First its a 2004 4.4 with mid 50's in mileage. When the car is on it there is a high pitch sound coming from the engine area and sounds like mice are running the car (haha) and when you open the hood its even louder. CARFAQ is clean and is in very good condition, is that any easy fix or a bigger problem. Also it has a sun roof and when you shut the doors (not any harder then normal) the sunroof shakes and makes a noise... If I put my hand on the sun roof and shut the door it did not make the sound. I made sure the sunroof was closed all the way also... known problem? thanks for the help.