Suitable for GL450, GLS550, ML550 , meeting the assembly requirements of coolant pipelines. Corresponding to A2782001000 and 2782001000 numbers, they can be directly replaced and used. Undertake the function of delivering coolant to the and connect the cooling system components. Assist in maintaining the working temperature of the and ensuring its stable operation. Corresponding to the coolant pipeline, it supports the normal operation of the cooling system.