I know in Germany murder is still murder if the murdered person consented to it.
Also, an autopsy isn’t just “randomly cutting someone apart”. The point of an autopsy is to determine a person’s couse of death and doesn’t just involve cutting the dead person open. You being alive means that an autopppsy, by definition, cannot be performed on you.
What you want is someone to mutilate and kill you. I’m pretty sure you can find someone willing to do that.
Side note: I think you overestimate how long you will stay conscious when the blood starts flowing, painkillers don’t fix your brain running out of oxygen.
It sure is easy to portray your country as successful, clean and beautiful if you don’t allow any free press to contradict you.