hi.. i have a question on my 1993 mercedes 190e 2.6 it has a wierd problem it runs good on the highway going at high speed. but at a red light it idles good also when i press on the gas pedal it stumbbles and dies and it wont start back up untill mabe 10 tries then it runs the whole day with no problems also in the morning it start up then dies on first try, but start on second try, i check the fuel pressure regulator and the fuel pump pressure its putting out 80 psi. i change the fuel accumlator and fuel filter my question now is what should i check for next any i deals is appreciate thanks.