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What type of coolant to use in a 1999 Chrysler 300m?

The 1999 Chrysler 300M requires a 50/50 mix of ethylene glycol-based coolant and distilled water. Chrysler recommends using a coolant that meets Chrysler MS-7170 standard. You can find this specification on coolant containers. Using anything other than a 50/50 mix can lead to issues with freezing or overheating. Always check your owner's manual for the most accurate and up-to-date information specific to your vehicle.