my parents wont buy me a car?

[mikeg]

Im 16 years old. Ive worked really hard on my own to get my liscense. When I finally got my liscense my mom and dad refuse to buy me a car. They try and come up with a lot of excuses. You see, I don't live with neither of them. My mom works overseas and my dad lives with his wife somewhere else. So right now I am living with my older siblings. Lifes really hard at this time. My siblings dont ever give me rides anywhere. 50% of the time they can't pick me up from school. I have to find my own rides everywhere. Basically I'm on my own. I dont have any parental support. Not that I NEED it. I just want to not have to depend on people that I can't depend on. The city I live in has no bus transportation. I can't have any reliable friends to drive me everywhere. I also want to get a job and start making my own money, but I dont live anywhere that is walking distant to a place that I could work at. I mean my parents actually make very good money. And we are very stable, we live in a nice house in a very nice community. Im very fortunate and I'm not trying to be spoiled. Its just that theres no way of me surviving here like this anymore. I don't know what to say or how to convince them to simply buy me a car. Im not asking for anything simple. My mom says she wont buy me a car because I might go off and do bad things. But I wont. I've emotionally matured so much this year without my parents. But they don't understand.Please, can anyone help me into telling them something REALLY convincing?