I have a 76 240d w115 body, I cant find the throttle position linkage on the trans to increase RPM when u throttle the engine.
At present she shifts very early, also caused the tranny to flare up or RPM raced up in between gears.

Any help can be appreciated.
I was able to tighten the shifting a bit by tightening clockwise the screw on right side / passenger side of the tranny.
The real issue is shifting too early.

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Have you tried looking into electrical problems?

This may or may not help, but...

My transmission was going into 4th at 30 mph. This is inline with what the FSM calls for, if I recall correctly.

The bigger problem was that I didn't have a passing gear.

After a multitude of linkage adjustments, I took it into a local indie who tracked the problem to a faulty kickdown solenoid.

Now that it's been replaced, the upshift points under hard acceleration have moved upwards (45 mph before it goes into 4th) and the kickdown is back. There obvious a role for the soleniod (or other electrical component) that governs how long to hold the lower gear.

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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.

I have a manual trans so don't hold me to this but from what I have read:

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1972 280SE 4.5

You should have a rod that runs under by the exhaust manifold and to the trans. You can adjust the length of it to change the shift points. I believe if you lengthen the rod you will raise the shift point RPM.

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thanks
I am trying to look for the rod, i know there got to be something to hold the RPM as one may not want to shift pre-maturely.
I guess that rod had been missing for long time.

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found her on pass side, shorten her is helping a bit need to do more.

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This test worked for me:

While your accelerator pedal is down to the floor (not all the way to kickdown though) check if the lever at the injection pump is at full stop. Adjust if necessary.

I hold my pedal down by clamping a stick onto the steering wheel.

While the pedal is held to the floor, pop off the front socket of the rod from the trans, and pull the rod all the way forward. The socket should be level with its pin.

You can turn the head clockwise to increase speed before change, as you have done.

Hopefully you will reach perfection before you run out of thread!