My 190E will not start. Starter and battery seem fine. When I spray ether in the air intake the car will start indicating to me that the problem is in the fuel system. Recently, the car suddenly died while running, but restarted immediately. I have replaced the overvoltage protection relay also recently because the previous unit was blowing fuses on cold start. I still have the same problem with the new relay before the current situation (i.e., not starting).
Any suggestions as to what I should check now?