Euro 230e fuel pump
 

Anybody know if a fuel pump from a 84 190e 2.3 will work on a 83 euro 230e.?

I dont claim to know for sure if it will work but man they used that fuel pump for a lot of cars for a lot of years. i would almost bet money that it would work fine even if the spec was not exactly the correct output, it would almost have to be at least functionally close. Have you tried to cross ref the part on line on the EPC Startec online parts site? Typically you can do a part search and it will show you several cars it was used on. It covers US and Euro cars. Even Japan and Aussie cars are searchable.