Corresponding part numbers 2128303396 and A2128303396, these are engine radiator coolant hoses. Suitable for 3.5L V6 engines in such as the E300 and E350, these are part of the cooling system piping. Connects the radiator to the engine, delivering circulating coolant. Helps the coolant dissipate engine and assists in temperature control. Resistant to engine compartment conditions, maintaining smooth flow and a tight seal.