Hi, this 300CE has been with me since 88. 2 months ago it started to run kind of rough. When I accelerated it wouldn't pull right away. It hesitated then started to move. Seemed like there was a clot in the fuel line preventing smooth acceleration. Then 1 month ago it refused to start all of sudden. I changed the fuel filter and the distributer cap and rotor. It started smoothly. But rough acceleration still persisted. So I replaced the spark plugs and wires. Then the car ran smoothly. But two days ago when I pulled it out of garage and switched to Drive gear and gave it a gas. It stalled. Then I tried to restart about 7 times before it would restart. I proceed to drive down the street. At the stop light, it stalled again as I tried to gas the car when the light turned green. I pulled the car to the side. I turned the key at least 25 times before it would restart again. Since then it has been in the garage. When I turned the key, the engine turned but just wouldn't start then I heard "plub plub" at the tail pipe. When I turned the key I was able to roll down windows, turn on radio and lights indicating the key fob was functioning. I suspect the fuel pump is at faul becuase I have changed pretty much all the ignition system and fuel filter. Any expert in forum please advice what could be the cause and what I should do next. Thank you very much. James Don't have a lot of money but do have time and passion.

 

Good description of symptoms. Hmmm... My guess is your fuel pumps (2 fuel pumps), you need to change both to be sure, because a weak fuel pump can deliver low fuel pressure which can have effect on performance... Good luck