Purge Mercedes Benz MB 140D oil system

Hello, I need help to change the oil filter of a Mercedes Benz MB 140D, because I do not know how to purge the air of the system after changing the filter.The problem lies mainly that ATRS years I had an oil vehicle and changed the filter, but it had a bombin to act the manual feeding and as I purge, but in this one I do not find anything like it, but in this one I do elèctrica that works with contact, but I dare not try because if it is not so, it will not have air in the system. I will give any help, thank you

Hello, you will see when you change it you fill it the new diesel atope and then you open the first injector, that if always with good battery ok, greetings

Hello, I have the help they sent me, I was able to change the filter without problems, but despite improving a lot sometimes it loses strength and then returns to normal. You will not carry another filter? Again thank you very much above all to the one that helps me with the change of filter.