I have a Mercedes-Benz 2002 80 series that is turning over but will not start change the crankshaft sensor. What I need to do next she go back to basics and check spark and fuel

Mark, Thanks for the input I would rather learn and I do this myself. Is there a certain computer they have to hook it up to or the steps that you can follow light turn left up on the break girl the right turn signal of the like that? The wife wanted this Mercedes,The car drives very nice when it is running correctly but starting to find out it is very sensitive. Very different and weird ways to reset things like stated above. Once again Mark thank you for the input is anybody out there knows I can reset the thing myself please feel free to give me the right information I don't dig this thing into a deeper hole. Thank you all. Jommy

Opps thank you joemom ,also should read jimmyjam had dental work done yesterday iPhone a hard time understanding me.