Shouldn't be a big deal, might go in place of the windshield washer tank? I'd remove the stock lift pump from the side of the IP and fabricate a plate and gasket to cover the hole (remember to fill it back up with oil!).

EDIT: also take advantage of the increased fuel pressure by installing either a higher-pressure bleed off bolt on the back of the IP or a fuel pressure regulator after the stock banjo bolt.

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99 E300 Turbodiesel 100k