Hmmmmmmm.....i dont know what you do exactly but if your clearing or even making 50k a year then i dont think you need the permission of your parents to buy the car. After reading some of the other replies i understand about the co-sign but i wouldnt imagine that you would need a cosign if you put $4500 down. All i can say is that if your making that kind of money id start investing it or buy a house and start making payments on it instead of a car. Hope it all works out for you though!!