IMHO, you might just be complicating your life.
The tank screen and fuel delivery system from tank to pump is sufficient; more often than not if a pump fails (after x decades of use) it's because of the brushes or motor as you'll read in other posts. If after 30+ years you need a new fuel pump for whatever reason, thank the people at Bosch for making something last so long, bite the bullet, and rebuild or replace it. Delivery pump damage from dirty fuel? Not too common, but if your fuel is that dirty you have problems elsewhere or inside your tank and an inline filter is at best, a band aid when a trauma center is needed.
Second issue to consider is are you impeding the fuel flow, either in pressure or volume? It's critical. Filters always cause a pressure drop. Will this cause you problems now or in the future?
Third, you are adding two more connections, that's two more things to go wrong. All filters need to be changed. So, that's another thing to do. If it never needs changing why put it there at all?
Fourth, and last, the most critical part of the fuel system is at the FI pump, not the fuel delivery pump. That's why the substantial fuel filter is there at the FI pump, not the fuel pump at the tank.
But hey, that's just my opinion.
Michael Salemi
1969 280SL
Signal Red 568G w/Black Leather (Restored)
President, International Stars Section
Mercedes-Benz Club of America
