That is good news! At least they think they have isolated a problem. I'll cross my fingers that the car mis-behaves for the service manager. You should record the mileage before you hand the keys over...something my dad use to do when I was in high school. He might want to take it on a joy ride, it's sooo cute!
Hope you get your Sebring and most of all, get your adorable car back to it's healthy self. I really do!