I will keep an eye out for you, since im not far from where you live. Im in the central NY area. Dont be discouraged. There are alot of cars out there (even with that color combo). Hell, there were two right here in my little town. I dont blame you for looking for a 560SEL. They are awesome cars! Someday I will probably pick one up. Ive always wanted one, but having the second thing closest to the 560 (420) tied some of my urges over. It has served me well for over a decade and hundreds of thousands of miles, just like a 560 will.
And to confirm what MikeTangas said, what you saw was the smog pump, which is unrelated to the self leveling rear suspension.
Good luck, and if you have any other questions, feel free to post them
93 300D 2.5 Turbo, Black/Palomino 273K
09 E350 Black/Black 41K