300e cold or warm start problem
 

Hi there,
I have a problem with my 92 300e , that if you start it , engine will run and died and start it again it will run with rough idle and then smooth out. This is when it is cold or warm. I do not know if has something to do with my pump , but i have this problem since I have this car for 5 years and just ignoring it. I have been using this car up to now. But it is just puzzles me if any parts that need to be replace. Also I did tune up and still have same results.