My daughter's 1987 300D (W124) has developed a significant oil leak during highway driving. No significant oil loss in normal city driving but it goes through a quart of oil in 100 miles at highway speeds, and leaves a huge puddle of oil when she stops.
She has a pretty good mechanic in her town who took a quick peek and said it "looks like the turbo". She is going take it back for a closer look but I'm somewhat skeptical about needing to replace the turbo.
I searched for posts with similar problems and found replies talking about return line seals and separator problems, but for models (even) older than this one.
Any thoughts on what this might be and/or anything we could point her mechanic to look at?
....................Scott