Pry out the two plastic pins at each end of the top radiator bracket.
Remove the upper radiator support.It is held in place with three T25 bolts on each side. On some models, such as CLS and CLK, you may need to remove the front grill as well.
Disconnect the wires from the horn.
Remove the top radiator support bracket.
Carefully release the hood release cable from the top bracket. It is clipped to the bottom of the top radiator bracket.
Locate the electrical connector on the back of the cooling fan.
Press the connector and pull it to disconnect it.
Remove two U clips at each top corner of the radiator.These clips can be easily removed by prying them up with a screwdriver.
Slide the radiator colling fan up.Look at the back of the cooling fan for hoses that may prevent it from coming up. If any of the hoses prevent the fan from moving up, move the hoses out of the way. At the bottom, the cooling fan simply slides into two channels.
Reinstall the new colling fan in reverse order. Make sure that the cooling fan is engaged at the bottom.
These instructions should help you replace the radiator cooling fan on Mercedes-Benz models such as C, S, ML, GL, GLK, GLE, GLS, etc.