GO,

If the MB engineers thought you needed cheap Chinese fuel filters in your car, they would have added some when building the car.

I had a fungus contaminated fuel system. After treating the fuel sustem with Biobor, I had to only change one inline filter when it plugged up. I suggest you check the fuel strainer and treat your fuel system with a fungicide if you find fungus on the strainer. But you dn't need to add extra fuel filters.

Replace any fuel lines you find to have leaks. Putting a small amount of pressure in the fuel tank (you have to block the tank vent), not to exceed 1 PSI, will show where any leaks are in your fuel lines.