Update and question- 81 300D

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Ok, after a weekend of fun (new front shocks and valve adjustment, both new to me on this car), I got out the mity vac today and started playing like I knew what I was doing. Of course, I was armed with prints of posts from this forum. Anyway, the cars been shifting funny lately, as in not shifting into 3rd and 4th without way too much "let off" on the accel., and the dieseling has morphed into not shutting down without popping the hood and hitting the stop button. So, after I found that my car doesn't have a Bowden cable or any linkage on the passenger side, (see picture below) I started checking vacuum lines. I found a connector was going in to the white transmission control doo-dad on the ip that was bleeding off, so I replaced it and it now holds vacuum. Then, I found a connector (small section of hose) that goes to the shut off valve from the brown line via the ignition switch, had an issue, (probably just too wollered out), so I replaced it, too. While I was at it, I pulled vacuum on that link to the shut off valve, and it shut the engine off quickly. So, does this mean that the shut off valve is probably good, but maybe the actuator at the ignition switch is bad?? I saw a tiny bit of oil at the end of the brown hose, but it could have been from brushing up against my really oily engine. The vac on the shut off definitely did the trick. But after I put the new "connector" on and drove it till it warmed up, it still wouldn't shut off without the stop button. The one thing I didn't do, now that I think of it, was check the vacuum on the brown line between the ignition and the shut off valve to see if that line was bad (Damn, I knew I'd forget something!) Anyway, any thoughts of what's going on with the non-shut down would be appreciated. Sorry about the long post. Oh, yeah, BTW it runs and shifts great now that I've adjusted the valves and fixed those few vacuum leaks, and the ride is better with the new shocks. Now I just need to get it to stop when I turn the key off before the cold sets in. It was 72* here today, which is a miracle in itself. Thanks again for all the help in these matters! Lee