It depends on how you 'run it to empty'. On the SDL I pumped the fuel out from the feed line until NOTHING came out. I then removed the hose underneath the tank and it dripped ever so slightly so I thought the tank was empty. However, when I loosen the tank screen, a gush of fuel came out because the screen was clogged bad. It leaked into the trunk and what a mess it was. More than a few gallons came out.

So if I do it on another car, I would insert a hose into the tank and try to suck it as empty as possible. You may get luck if the screen is not too clogged.

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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.