I just purchased my 99 c230. There is a hum coming from the homelink speaker area. The dealer said that it is the motor for the free air fan located behind the dome light and home link speaker. The dealer said it is over 100 hundred dollars for the part but that I could just disconnect the motor to save the trouble of replacing it. Has anyone heard of this and can anyone give me instructions on where all the clips are to drop down the dome light console. Its easy enough to pop the lens cover off and I found two clips towards the windshield side that I have released I just cant find the other release points. Thanks in advance for the help.