What kind of coolant is for the 3.5L? Green or Dex Cool?
ny good coolant will ..but for your peace of mind ..2004 Chrysler 300M Special > http://www.oreillyauto.com/site/c/search/Antifreeze/N0496/C0059.o ap?model=300M&vi=1424315&year=2004&make=Chrysler
Get what is recommended for Chrysler cars and avoid Dex-Cool.
Why do you suspect they put the wrong coolant in?
The car runs at a higher temp then it did, it's like it wants to over heat and then the thermostat opens and drops to where it should be. Gauge points straight to nine o'clock. Then climbs up to 11 o'clock and rinse and repeat.
Looking for a Used 300M in your area?
CarGurus has 229 nationwide 300M listings and the tools to find you a great deal.
Search Chrysler 300M Questions
Chrysler 300M Experts
Related Models For Sale