Its a pretty straight forward achievement to get here's what I did: I did the first three classes (C,B, and A) these classes combine have a total of ten tracks to do this on. I used the VW Rabbit GTI since its a very compact car that you can go slow pretty easily and I just upgraded its car class as it was needed. The key is to go slow, use rewind if you need to, since it wont count as a miss. Take advantage of coasting whenever possible to avoid the need to brake a lot and to keep a steady pace.