W115

1976 300D Auto Shifting Question

I have a 76' 300D that I have to back off of the gas pedal to make the shift from 2nd to third. The 2nd to third shift will NOT happen unless I cause it with the gas pedal. The 3rd to 4th shift works better and will sometimes shift by itself without me backing off of the pedal. All the shifts happen in the indicated spots on the speedo, more or less, the kickdown into 1st operates just fine and the trans goes into drive and reverse with little to no hesitation. Trans has aprox. 175K on it.
Is there a linkage I can adjust to fix this, or is it a sign of my trans slowly going? To my knowledge this year trans did not have any vacuum hook-ups.

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1975 300D Passenger Door Part Missing?

Not sure how to explain this, so apologies up front. In the process of repairing my vacuum door lock system I ran into an issue with the front passenger door. It's different than the other doors. It appears that MB designed this door system to allow you to open the door while the other doors are in locked mode. I think there is a part missing on mine (maybe a spring). The actuator pushes (unlocks) the door knob (stem) up, but when the actuator pulls (locks) the door knob (stem) stays up.

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1975 300D Door Locks Repair

This weekend I repaired 2 doors using the rubber diaphragm kit from this website. However; on the front passenger door the pull/push knob stem seems to be dis-connected from the rod that is controlled by the actuator to lock and unlock door. Not sure what I need to repair, hard to see.

Also, I'm looking for the driver side door lock switch actuator that has the 3 vacuum lines, 1 in and 2 out but can't locate on this site.

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