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.
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