Boateng, 31, broke government rules by leaving Munich to take the four-hour trip to see son Jermar, 4, in a hospital in Leipzig.
The Germany international crashed his vehicle on the way home, with Bayern finishing him afterwards.
"I know that it was certainly a mistake not to inform the club about my trip, but in the moment I only had my son in mind," Boateng told German newspaper Bild.
"He was not in good health. When a son calls his father, of course I will still go, no matter what time.
"For him I accept any punishment; after all, he is my son.
"I want to see the father who does not go in such a moment to be with his four-year-old son. If there is a punishment for it, then I respect it. I find it sad."