I heard a kind of pop pop splutting? sound at idle. Sounds like it might benefit from a diesel purge or injector cleaning.

Overall, the engine sounds pretty healthy to me.

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Codifex
1981 240D ChinaBlue (Got her running with a donor engine.)
1983 300DTurbo w/sunroof.
1984 300TD manual sunroof. (Electrical Gremlins)