You know, many native American tribes pay close attention to children's dreams because they believe they contain clues to a child's true destiny. So who knows: maybe your little girl is, indeed, having a flash-forward of a future career. Car-doctoring is a noble, indispensible profession.
On the other hand, your daughter has a strong desire to fix things that are broken. So, substitute ambulance for tow truck, garage for hospital, and voila:it's just possible you have an E.R. doc in the making--though you might want to teach her the difference between a pliers and a forceps.