I've never seen anything but the MB line work very well. Usually anything else swells, softens, and leaks. I assume you could use fuel line if you could find any that small (2mm ID), but the stuff from Benz works great.

The only thing to watch for is etremely hard return lines -- the ones on my brother's 300SDL were so hard the snapped if you tried to flex them. Not leaking, but only a matter of time, so to speak. When I took them off, they snapped off at the tip of the nipples on the injectors, and I had to fracture off the remains there on the nipples in order to get the new ones on! Ripped one up before I realized what was going on.

Best way to remove them is to get a pair of needle nosed plier with a good sharp square edge to the jaws, and grab the line alongside the nipple on the injector. Get as much of the material in the jaws as you can -- don't grab the nipple -- and shear the hose off the side of the nipple by crushing and twisting. This will tear the side off, making it much easier to get the rest of the line off, especially if they have gotten hard.

To put them on, make sure the nipples are clean, then use the needle nosed pliers to grasp the line just above where the nipple will end up. Hold along the length, not across. Push the line down on the nipple, making sure it seats all the way down on the injector.

Note that a torn or porous line will dump large amounts of fuel, the IP overflow will back up and run out, too.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!