Part number: MER-1268300384 is a new, unused Genuine Mercedes a/c expansion valve. The A/C expansion valve regulates the flow of Freon plus it supports the process of Freon changing from liquid to a gas (by allowing the Freon to expand). As the Freon expands, it becomes cooler just as it enters your car's evaporator core and cools your car's interior (with the help of your interior fan). Most expansion vales fail due to clogging, causing it to stick in an open, closed or partially open position and must be replaced.
Genuine Mercedes parts are recommended by the factory for your Mercedes. You can expect replacement trim pieces to fit without issue, and suspension and engine parts will offer a greater life and better performance.
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