So, my 850 10v EZ10/95 has now also the ABS light problem with estimated 350,000km. Once after the start stopped and after a few minutes went out again, the next start it stayed on and lights up since then. After this can hardly be overlooked here in the forum, I did not worry at first –> Steuergrät solderen! Brav with the 4mm-six-edge three screws at the STG solved, in order to then miserably despair at number 4 (the most difficult to reach) then… I have now certainly 5 different hexagonal nuts, a Torx-screw with levers, various pliers and actually the correct outer torx-nut from the car mechanician tried out. The screw does not open! The head just seems to be too round… Now the question, to people who have built the control device apart already times: Is it in your opinion a way (manage?) to get the thing out without having to unscrew the screw and without destroying the board or other important parts is actually to be destroyed?