Many new car dealers advertise unusually low interest rates and other special promotions. Ads promising high trade-in allowances and free or low-cost options may help you shop, but finding the best deal requires careful comparisons. 
Contributed by: Federal Trade Commission
Last Reviewed: 07/17/2009

http://www.ftc.gov/bcp/edu/pubs/consumer/autos/aut05.shtm