Sounds like an ignition failure instead of fuel system. Cap, rotor, wires, coil can cause this. Is there spark to the plugs?
The fuel pump gets power from MAS relay on 1990-93 cars.
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)