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Make mating marks on the radiator upper hose and the hose clamp. Disconnect the radiator upper hose.
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Use special tool water temp sensor wrench (MB992042) to remove the engine coolant temperature sensor.
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Avoid adhesion of engine oil or grease to the O-ring.
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Fit the O-ring in the water inlet pipe groove, wet the O-ring circumference or the pipe mounting area inner wall, and then insert the O-ring.
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1.Apply the specified sealant to the thread of the engine coolant temperature sensor.
Specified Sealant: Three bond 1324N, Loctite 262 or equivalent
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2.Use special tool water temp sensor wrench (MB992042) to tighten the engine coolant temperature sensor to the specified torque.
Tightening torque: 30 ± 9 N·m
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1.Insert radiator upper hose as far as the projection of the water inlet fitting.
2.Align the mating marks on the radiator upper hose and hose clamp, and then connect the radiator upper hose.
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