So do you buy the lines with the fitting type ends installed and are not serviceable items by replacing just the fuel line on the existing fittings? (While I have not touched them the hard plastic appears to be heat shrunk onto the black plastic fittings and look to be a bear to remove as they at least were thought to not warrant putting any external clamp on so they must tight.)

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1996 E300D
1996 E320 Wagon 4MATIC
2003 Jetta TDI- GLS, 5-spd
1997 Passat TDI
2002 F350 Crew cab 4x4 Powerstroke
Jacobsen HR 15' cut ZTR w/ 80 HP Perkins diesel
Hustler 6' front deck with 28HP Kubota diesel