Hello friends, the Mercedez pump is lubricated independent to the engine and therefore you have to check the oil by a red barilla, to put oil it has a red plug through the governor and also has a small one had on the side of the pump, that when you put oil and it is at the level the oil begins to bounce that that means that it is full, it also has a plug to drain the pump when you want to change the pump when you want to change the pump when you want to change the pump when you want to change the pump when you want to change the pump when you want to change the pump when you want to change the pump when you In this case this pump is lubricated with oil, there are others that are only lubricated with diesel.