I have a 88 420sel with 119000miles on it, and going from park or neutral to drive or rev. there is a fairly loud clunk similar to excessive lash on a old chevy PU with a milliom miles on it. This is embarrassing for a nice looking benz as your backing out of a crowded parking lot However there is no noise down the road or ever again until you shift out of drive into rev. or the other way. It also seems to bang coming out of rev. too, but not pulling it out of drive. Absolutely smooth and quiet down the road and when the auto shifts, positive shifts and no abnormal noises. Could someone please help with a couple of suggestions. Have also changed the gear oil recently, just as maintenance, and no change.