Hi. My mk2 punto 04 started to make a sound. It sounded like a electric sound , very much like a car makes going in reverse . I looked it up on the web ,as you do, and all things pointed to the cam/timing belt. So I got a mechanic to come look. he said it was not the belt but was coming from the wheels somewhere. He said it was the drive shaft and also a barring . so I got him to replace both. but After he did there was no change in the sound of the car. he then said I was probably right and the timing belt needs changing, But after paying him for the drive shaft and barring I don't have enough money to fix the belt is my car safe to drive ?