For the life of me, where do they put the primary fuel filter on a W115 chassis 300D? I am having low high end power, almost a cutting out, but perfectly fine low end power. I suspect this to be the problem. But I cannot for the life of me figure out where they put it. Did they bury it underneath somewhere?

Regards

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1976 300D
190,000 Miles
Colorado Beige

1975 300D
Parts Car
78,000 Miles
Rustbucket
Also Colorado Beige

1984 190D 2.2 (Dad's)
156,000 miles
Champagne Metallic Clearcoat