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.