Yes I agree with the others. I had to learn about the giude rails the hard way but had I posted here when I first got my 85 380SE would have saved alot of time and $ Mine has 180, 000mi and had all the tell tale signs
of iminent catastrophy. so the first thing I would do is replace the 3 upper guide rails ---if they have even a little brownish color to them replace them. Other than that mine is perfect. I just purchased for my wife a C220 '95 very clean runs perfect and she wants my 380SE (not gonna happen)

Don Tarrow