Each linkage has a ball and socket end. These are adjustable. Loosen the nut on the shaft next to the socket end, pop socket off ball and unscrew a few turns then put back on and check linkage. You may have to adjust several to get back the full movement. Just be sure to not get it to tight so that it will not return to idle. The part you are trying to adjust can be left alone. This effects gas/diesel pedal height.

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1977 240D turbo