How do I pull it out?

There is no screw to loosen or fasten.

By the way, the hose looks fragile. It has tiny suface crackes. I get a feeling that I may develop a puncture if I bend it several times.

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1992 300D 2.5 turbo diesel. 319 k miles.
124.128 chassis, 602.962 engine, 722.418 tranny.