She is the daughter of industrial tycoon Herbert Quandt, who transformed a nearly bankrupt BMW into the automobile giant it is today.
Klatten's family reportedly lives in Munich's artsy Schwabing district.
Klatten used to be so media shy that some called her reclusive. There is hardly any video of her and her family. The media here have repeatedly used the same archive photos of her.
By filing charges Klatten revealed her identity and for the first time she gave an exclusive interview to The Financial Times Deutschland where she was quoted as saying, "You are a victim and you must protect yourself. I am pressing charges on behalf of all women in my family and in the name of many more women."
She has not talked to any other media and is not giving any interviews.
Joerg Appelhans, her spokesman, issued a statement to ABC News saying, "Once Ms. Klatten realized that the relationship with Mr. S. was based on the criminal intent to betray her and extort money, she was determined to take action. She was fully aware that by pressing charges, she would face the unpleasant consequences of opening her private life to public scrutiny."
Appelhans declined to comment on details about the affair that have emerged in press reports.
Ann Wise contributed to this report.