I have a 1987 420 SEL. My outside ambient temp LCD is about half black. I have purchased a replacement LCD, but I'm not sure how to change it. Do you have to remove the instrument cluster, or can you reach it from the bottom? I have recently purchased this car with 138,000 miles. The sunroof will only open about 6 inches, then stops. You can still hear the motor run, but the roof does not proceed. When it closes, one side appears to close before the other, resulting in a small gap, which can be corrected by moving the sunroof switch back and fourth a few times. Any ideas what may be my problem and how to correct? Thanks!!