The 24-year-old woman had attended the beer festival with her boyfriend and his family, but had got separated from them after leaving tent, the Festzelt at around 11.30pm. After waiting a short while, she decided to return to their hotel, wrote the Munich-based Tageszeitung newspaper.
On reaching the underground station, she was approached by a taxi driver, who she told her that "the U-Bahn will be closed already", and that he would take her instead.
When the unnamed victim explained to the driver how she had got separated from her boyfriend, she said he initially stroked her knee as if to comfort her, before moving his hand up her leg and trying to rub her crotch, the newspaper reported.
At this point the young woman jumped out of the cab and took refuge in a bar. Later she took a separate taxi back to her hotel.
The woman, who was not physically injured in the incident, described the pushy driver as male, of Far East Asian origin, aged around 35, skinny, with dark, straight hair.