Mercedes Benz repair: 1988 MB 190E 2.3 Engine Shutdown, mercedes benz 190e, mb 190e

Question
After driving for about ten minutes my engine starts to sputter, backfires, then stalls.  I have to let engine cool for about twenty minutes before it will start again.  It will stall again in just a few minutes.  Oil pressure drops to 0 just before engine starts to sputter, etc.  I have replaced plugs, plug wires, O2 sensor, fuel pump, fuel filter, cold start valve.  Do you know what I should do to correct this problem?

Answer
Your car needs hands on diagnosis by a Mercedes specialist.
Best guess:
Three possible issues come to mind:
#1. Overload Relay may be bad.
#2. Fuel Pump Relay may be bad.
#3. Catalytic Converter may be plugged.

PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1988 Mercedes Benz 190E 2.3
Part: Overload Relay
P2056-18126 Overload Relay IN STOCK $77.62  
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...

PART NUMBER SEARCH RESULTS WITH PRICES
Vehicle 1988 Mercedes Benz 190E 2.3
Part: Fuel Pump Relay
P2037-34082 Fuel Pump Relay IN STOCK $149.36  
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...

Vehicle: 1988 Mercedes Benz 190E 2.3
Part: Catalytic Converter
Select one of the products from below  
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    Catalytic Converter
50 States
"After-market" OBD II Catalytic Converters Not Legal for Sale in California 1995 ON    Year: -1988
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    Catalytic Converter
Federal Only
  Year: -1988
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    Catalytic Converter

"After-market" OBD II Catalytic Converters Not Legal for Sale in California 1995 ON      
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    Catalytic Converter
Federal
"After-market" OBD II Catalytic Converters Not Legal for Sale in California 1995 ON      
http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=merc...