Trans Adjustment W115/300D '76

[samdon]

I have looked and searched but come up short on this one. I even have the shop manual which references linkage on some models, vacuum modulators on others, and so forth. I cannot find any linkage or even where it may attach at the throttle linkage if it were to be there. I can find no vacuum source either leaving the engine compartment or where it would terminate on the tranny. I'm not new to Benz and I've just replaced a tranny in one of my late 201's so I feel fairly comfortable that I can find my way around once I locate the adjustment point/points. I understand the relationship between load, shift timing, and shift firmness pretty well by now I hope. What I don't see on this engine is any vacuum regulating device to replicate the behavior of a gasser. That leads me to think that it is mechanically controlled via linkage but there is none. Am I as lost as I think?

There must be something regulating the shift points as it does not do a bad job at all. I do get a slight flare between 3rd and 4th when pulling up hills and no kickdown but otherwise it does well. What I'd like to do is firm up the shifting as is possible with the vacuum modulator on later models. Kickdown switch is dead but that's an easy one.


Any direction you folks could provide would be wonderful.

Thanks,
Sam

'91 190E 2.6 "Survivor"
'93 190E 2.6 Sportline "Treasure"
'76 300D "Slow Gin Fizz"