No, they cannot take your car for college loan payments. They can, however, potentially have money taken directly from your pay and/or garnish your tax refunds. Your best bet is to try and resolve your account with the loan company. If you have defaulted, ask them about consolidating or rehabilitating your loan. If you haven't defaulted, there are many lower payment options, deferments and forbearances that may be able to assit you.
Regards -Cicily
You can get assistance with the consolidation of your loans through www.defaultms.com