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'95 E300 DIESEL, '91 600SEL, '92 600SEL
19,752 Posts
Could be a leaking fuel heater or associated gasket.

Also keep in mind that all of the fuel lines are prone to leaking on this particular model.

If your lines look brown or black, replace them all especially if you still have the old style with metal clips. Get the updated lines, especially the one that goes on the back of the injection pump that replace the clip style with the reliable old style banjo fitting and associated bolt.
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