Thanks all.
pmckechnie: telling you this is a '62 220 W111 Coupe that originally came with a manual trans would certainly have added more confusion as it is now equipped with a Djet 3.5 M116 engine and a three speed auto trans that I believe was even not the type originally mated with that 3.5 engine.
a bad vacuum modulator valve was also mentioned to me on another forum. I am really not conversant with auto transmissions. Is there a way to test if this is the culprit? Is it an easy fix? Below is a picture of what I believe may be that valve as there is a pipe attached to it. I that expensive?
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