Very simple diagram. I've used this is a number of vehicles including a GMC school bus (8.2L), 5-6 VW TDIs, a volvo and john deere tractor.

*No filtering necessary!*

"Mobile "Holy Grail" version of this rig:

I made a mobile unit out of this same rig, to use when I am travelling long distances so I don't have to carry hundreds of gallons of Veg. Oil. I run it with a little, quiet honda 2000watt generator, or plugin power if I am stopped where I have it. I mounted this same rig on a closed top barrel, and put a 3 way ball valve in the pipe from the CF output to the barrel, and switch it at shutdown into a small jar to capture any water and goo that comes out."

http://www.xyzworks.com/centrifuge.htm (scroll to bottom of page for the mobile holy grail version of the centrifuge wvo cleaner system)

"We have received many emails as to why we don't offer a dual tank SVO conversion kit for a 123 300TD wagon. Installing an efficient and practical dual tank conversion in a wagon is challenging to say the least. The first big issue is the design and location of the factory fuel tank. It is located below the rear floor and is fairly narrow in height. To install a heated sump at the level of the tank outlet requires some very special component mounting brackets. The second issue is where to install the second tank. Putting a tank in the back of the wagon reduces hauling space and creates fuel smell and spill problems. Yes, even veggie can smell bad over time. Some have chosen to put a very small tank in the engine compartment for purging and startup, but you just end up having to fill it all the time."

http://mercedessource.com/node/3449

"This is my most recent filtration system. It should cost around $75 with shipping."

http://www.geocities.com/jaycimini/FilterationNew.ht...

"This kit can be home built with materials from your local auto parts and hardware store. All you need is an understanding of the system, some mechanical skill and a diesel vehicle."

http://www.ktmauto.com/wvoparts.html