Need Help Buying My First New Car

I am trying to buy a brand new car. I am 18 years old and turn 19 in a couple months. I was considering a new Chrysler Sebring Coupe with the 7-year 100,000 mile warranty. I have $3,500.00 for a down payment but I have no credit or co-signer. My mom and dad can't co-sign for me because they have bad credit, but my mom said she would put her 1996 Sebring up for collateral if it would help me get this car. I have a good steady job and can afford the payments, but I have had absolutely no luck finding a co-signer. Is there anyway I can get this car?

try a few local credit unions... they are usually good with stuff like that and with 3500 down you can probably find someone to help you...
goodluck