I will do this in English, lots easier for me. Here is some info on these Koni dampers, could be interesting for some people here.
Found this website which gives a lot of information about the electrically adjustable Koni's:
http://www.maserati-alfieri.co.uk/alfieri292.htm
The system was fitted to:
Maserati Quattroporte IV (AM337)
Some version of the Maserati Ghibli and Maserati Biturbo
Also some other manufacturers may have used these koni's
The (Maserati) Koni ECU is not exactly the same as the one sold for the Supra's but it should be possible to retrofit it for the Supra. I do not know the Maserati and Koni partnumbers unfortunately.
I have two sets of the electric Koni's and I will try fitting one to the Supra in the summer. Will update here if it all works out.
I know that Koni do not want to restore these dampers anymore, but this website provides information on how the dampers work and what DC-motor and gearset is in the damper. With this information I think it would be possible to restore these dampers whenever these fail.
This website shows the servo, also there is a link to Aliexpress where this part was actually sold.
https://www.eng-tips.com/viewthread.cfm?qid=470422
I'm not sure how to add picture of the Supra and Maserati Koni ECU, if someone is interested please tell me then I will try again.
Also I don't mind reading in German but it's a bit hard to write, sorry.
Gru