I have an 02 ford fusion. The speedometer stopped working on it and the garage said it showed a speed detection fault, it then suddenly started working. The very next day I had driven the car about a mile and stopped to pick something up and couldn't restart the car. It showed eac fail, it was towed to the garage and they checked it out and I was told it was a safety mechanism that would happen if the car overheated. While looking over it the mechanic asked if someone had repaired my clutch, I told him no I'd had it less than 3 months and had no repairs done on it. He pulled out some locking pliers and said that's what had been holding my clutch together, and showed me a small black box that he said was part of the clutch but that it had broken off and been shoved up the back. His advise was take it back to the dealer and let them deal with it but the dealer isn't interested. I don't know what to do next, I know nothing about cars