how to drain gas tank
Super Member
Joined: Apr 2012
Posts: 887
Likes: 2
From: Northern California
2004 E55 AMG; 1991 Previa
Super Member
Joined: Mar 2011
Posts: 502
Likes: 0
From: Porter Ranch, CA
E55, CTS-V Wagon, Duc 1098R
If you have star, you can remove the braided line to the fuel rail on the fire wall side, connect a hose to it, and "activate pumps" in Star. That's how I did it. The fitting for the hard line is a metric fitting but I can't remember the thread size. I'm pretty sure you can get a hose around the hard line with a clamp and call it good...
Super Member
Joined: Jun 2012
Posts: 714
Likes: 7
From: Atlanta, GA
2005- E55, 2007 GL450, 94 B3000
The easiest way to drain the tank is:
Connect a fuel pressure gauge fitting to the port on the fuel rail.
Connect a long enough hose to this line to reach the receptacle you are going to fill.
Start the engine.
If you are going to be filling multiple containers. You can clamp the line with pliers. This will allow you to swap containers without spillage.
The engine will run without any concerns. Draining the tank in this method allows the siphon jet system to work properly. Draining both sides of the tank.
Connect a fuel pressure gauge fitting to the port on the fuel rail.
Connect a long enough hose to this line to reach the receptacle you are going to fill.
Start the engine.
If you are going to be filling multiple containers. You can clamp the line with pliers. This will allow you to swap containers without spillage.
The engine will run without any concerns. Draining the tank in this method allows the siphon jet system to work properly. Draining both sides of the tank.
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Joined: Dec 2006
Posts: 1,124
Likes: 32
From: Florida-Germany-New York
2004 E55,1969 300SEL6.3,2011 ML350 BlueTec Diesel,2005 ML400 CDI
