My grandfather worked hard and left me a trust too, but did something quite intelligent- I'm not allowed to have it till I'm 25. In the hopes that I'll use his hard earned money for something responsible, with longevity. Perhaps a down payment on a house.
ok, you "need" a new car... there are cheaper cars than a mercedes-benz... one you might actually get to keep with the amount of money you CAN access from the trust fund.