AAA offers

Save $45 on a weekly rental in California or Florida through 10/31/13. Intermediate or higher(Offer excludes Mercedes-AMG, Porsche and other exotic vehicles).
PC# 191575.

http://www.hertz.com/rentacar/y-1408...-special-offer

Save $30 or $40 (reserve two weeks or more in advance for $40 off) on a weekly rental in the U.S., Canada, Puerto Rico and Mexico through 11/30/13. "Most Car Classes" but only offer excludes Mercedes-AMG and Porsche is mentioned.
PC # 189792 ($30 off)
PC # 189803 ($40 off - two week advance reservation)

http://www.hertz.com/rentacar/y-1406...-special-offer

Free Weekend Day on a 3-day minimum weekend reservation through 10/31/13.
Any size except Porsche, Mercedes-AMG or other exotic vehicles. U.S., Canada, Puerto Rico and Mexico.
PC # 191586

https://www.hertz.com/rentacar/y-733...-special-offer