Beautiful car, great color (except for the oil-colored engine).
Always had a soft spot for the W115, but they're almost impossible to find without rust. A 300D is powerful enough to make it practical as well.

If it feels good now, I'll bet it will feel amazing once you adjust the throttle linkage properly and do the valves. A diesel purge can't hurt, but probably won't solve anything. After rebuilding my injectors, I'd recommend anyone with original injectors do it at this point. So much smoother. A N/A needs all the power it can get, especially on the highway.

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