So i was able to do the Updating (changed Notebook as well) and finally got access to SIPS and did R63 (USB+SIPS), TBOX (USB+SIPS) and HVAC. This went smoothly without any issues.
Unfortunately i did try to update FVCM for LKA which did not succeed, ended with unknown error. Today I will try with a recommend method (
Replace thanks to @haloweenhamster ) to get this hopefuly working again.
Right now no LKA, TJA, ACC, EB for me

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This time i will attach a charger to the 12V Battery, even when SIPS showed that 13.6V (which means DC/DC active) were applied. Could also be that some Systems went to sleep, did this update after the previoulsy mentioned. Wish me luck

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