Sorry for being it in English but German is not my native language tough I can read it. Had this problem with my 2018 Insignia 1.5 turbo 6 speed automatic. Apparently there is a technical service bulletin by Opel for this microswitch malfunction. Mechanic wasn't around when I picked up the car so couldn't ask how/what they've done but they used part nr. 1687264480. The part itself was 70€ with another 200€ of labor costs. Haven't had any problems since the repair.
