[tronico]

here dpf off Astra J You must disconnect temperature sensors and differential sensor after write.

pass n pm

Sorry about the late reply, but I wanted to be sure before I call it "solved".
Under the first 1000 km I got two times MIL on (DPF and even sensor relevant DTCs which is very strange by a "sensor disconnected" method). But after that I drove more then 5000 km and no more DTCs appearing. So I think I can say now bravely that your solution is working properly. Thank You again for your help!