Since you've changed the filters, try doing a diesel purge.

You're also now in a good position to check the compression after adjusting the valves.

0-60 in the 30 second range for an automatic is the norm. A few seconds less with a manual.

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1974 240D "Boldie" 170K.- New timing chain/freshly rebuilt IP/replaced valve seals/injectors/upgraded stereo/new Bilsteins with Yokohamas/fresh paint and rocker panels plus lots of welds.