One of the dumber stumbling blocks with the junkyard-find 190E 2.3-16 Cosworth had to do with the interior. The original Recaro seats were in bad shape, so I bought a replacement interior not too long after acquiring the car. The one downside is the Recaros came without bases, so they had to be swapped off of the original, battered seats.
Since installing the replacement seat, it would do one of two things: it would shoot all the way forward or all the way backward. The 190E regardless of seat options were all powered, so the easy fix was to replace the power seat switch, which also controls the memory. We replaced it twice with no change in behavior. Now, the reason I say this is a dumb obstacle is that the car actually starts up and idles quite nicely, but you can't very much drive it without a seat. Incredibly, the lack of easy resolution with the seat is one of the bigger reasons why this project hasn't moved much lately.
My shop finally had some downtime today and found the source of the issues: the control box that sits under the seat definitely got soaked, with all sorts of corrosion inside the box. This most likely happened while it was sitting in the junkyard with no rear windows, courtesy of the yard "help" that smashed them out to get the window regulators (those and the radiator were the only parts they sold off of the car while it was inventoried.)
The bad news is, not many used parts still exist; the good news is, you can buy one new from Mercedes. So, we'll order one up in hopes this lets us install the front seat and actually take it out onto the road.