Mercedes B-Class W246 2011-2019 Radiator Coolant Expansion Header Tank Vehicle Model_CLS-Class E Number (3 799 085)

E Number (3 799 085) in the product specification to help ensure correct compatibility before ordering

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Mercedes B-Class W246 2011-2019 Radiator Coolant Expansion Header Tank Vehicle Model_CLS-Class E Number (3 799 085)One of the lesser known parts on your Mercedes Benz B Class is the coolant expansion tank. This component is responsible for catching and storing coolant overspill from the vehicle's radiator. The coolant in your vehicle is designed to prevent the engine from overheating. As it reaches its optimal operating temperature, it expands and can overflow. The expansion reservoir collects this excess fluid and stores it safely instead of letting it spill onto