Made some progress again 🙂 First i cleaned all the switches and buttons by hand so the white texture finally came back to life and is visibla again. worked surprisingly good with an old tooth brush and some dishwashing water 😉 Well and then assembled everything back together. not factory fresh but as nice as an 44 year old switch can get 🙂 Then started with the turn signal switch on the other side. seems a bit more tricky… The contacts had massive burn marks So this is after cleaning 🙂 Who needs puzzles when you have cars? I never realized how complicated these switches are until i took it…