Hi

just solved a stalling problem on a 190E(very similar car with the same systems).

I checked all the electricial components in the engine compartment related to the fuel system. Then I checked the wiring harness and connection to control module. After those checked out I tested both fuel pumps and they checked out. I took a closer look at the plastic cover and noticed that there was a leak at the hoses at the fuel pump assembly. I bought all new hoses, replaced the in line filter in the gas tank, cheked the suge bowl in the tank, the OVP and mas( your model year wont have it).

The problem was still present until I replaced the hoses at the fuel pump assembly and the car has been running fine since.

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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)