The 2003 Chrysler 300M is available as a 4-door, 5-seat sedan. Starting at $28,885, the 2003 Chrysler 300M Base is powered by a 3.5L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 27-mpg on the highway. The top of the line 2003Chrysler300MSpecial Edition , priced at $ 32,315 , is powered by a 3.5L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 27-mpg on the highway.