!989 300 SEL. My MB sat 3 m0nths because of illness. Since then starting was a problem. Would run after long warm up. NOW it starts up fine but cuts right off.

I am trying to figure out if it is gas line, furl injextors, pump. Tried Techron in the beginning?

I live in a rural area and hope to make diagnosis before car is TOW for repair. MAYBE WE CAN FIX IT?