Quote:
Originally Posted by Frank Reiner
gmb:
The opportunity to place ignorance on display cannot be passed up:
Why is there a restriction in the return line? Such has not been observed elsewhere.
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This is for a different model, but the problem is the same --
Fuel Tank Strainer, Fuel Tank Insides, Swirl Pot, Return Line Venturi - Mercedes-Benz Forum
The venturi gets clogged -- in this case after sitting for several years. There's no direct access and it can be challenging to unclog.