The sunroof on my 1987 190E 2.6 opens fine, but when I try to close it, the wind deflector (the grey thing on the leading edge of the sunroof) doesn't automatically lower. The sunroof just hits it. I have to use some pretty fine hand eye coordination to hold it down and move my finger just in time so I don't get my finger caught. Does it sound like somethign needs to be lbed or replaced? TIA