“He and his wife, Elizabeth, who live in suburban Lincoln Park, about 25 miles outside of New York City, have kept their daughter’s car because they paid for it,”
Sell the car.
Unless the car is titled and registered in the daughter’s name they can do whatever they want with it, including selling it.
The teen has chosen to destroy any “family” she had with her parents, all in the name of being a spoiled little princess. What a brat!