I am thinking of designing my own 2 tanks system - main tank is WVO and a small ( 1-2 gallons ) holding tank for diesel. I want to design a one shot electronic circuit to purge the lines from the holding tank at the end of the driving day. If I T the holding tank just before the primary filter, anyone has any idea how long it takes to purge the lines of WVO? I want to set up an one shot electronic timer to do that, assuming the car will be traveling at 30 mph or less during purging. I will press a button ( x sec/min ) before I park the car, lines will be purge with diesel and the car will start with diesel the next day. The only negative is that the WVO may not be at temperature when the diesel is used up in the lines at the next start but I will improve on that later.

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.