My Car will not start, the starter keeps going but it is not firing up

It could be the fuel pump or the fuel pump relay. I have replaced several fuel pump relays on this vintage Mercedes. Best to have a shop Diagnose this as the problem, because it could be something else. http://repairpal.com/mercedes-benz-repair-in-fort-worth-texas

Most likely is fuel pump relay - so much so that I carry a spare in both my 560s