1991 190 E wont start
 

I have a 1991 190e 2.3 That died in traffic and I hat to have it towed. When I crank it it mit stay on for 2 seconds after cranking and after that it does not come at all. I changed the fuel filter but my problem was not solved. I do hear the fuel pump buzzing and staying on during cranking. I had someone crank the car while I sprayed starting through a vacum line and the car stayed on as long as it had the starting fluid. Any help will be greatly appreciated.

Sounds like it isn't getting fuel. So, is it the pumps or is it the fuel distributor or the fuel pressure regulator.