Help me sell my mom on a new car..

[Curious Joel]

I asked my mom today when I could get a new car. She says not until graduation, about 9 months away. My car already has 102,500 miles. She says the only way I can get something sooner is if major things start breaking and we have to pay a lot of money to fix it. My parents are people who keep their cars until the wheels fall off, because to them a car is just transportation. Any ideas on how I can convince her to let me go from a 2003 330xi with 102,500 miles to a new 2006 330xi? The first thing I've thought of was the trade-in value of my E46... When she talks about getting a new car, she assumes we'll get about $10,000 for the car I have now. According to KBB.com, the car is only worth $14,540 right now. By the time I got a new car, I'd have a ton more miles and it wouldn't be worth that much. Any ideas?