Lift the rear seat and remove the in tank pump. Siphon or dip it all out and clean as best you can. Some have done as you thought and wired around the pump itself to use it to remove the fuel.
Full Answer
Why is my Volkswagen Golf battery draining?
If it is draining while your Golf is off, it’s usually caused by something that is drawing current that shouldn’t be. If the battery is draining while you’re driving, that is probably going to be the alternator or battery.
What does it mean when your golf battery drains?
When the battery drains when parked, the odds are that it’s the battery itself. If your Golf’s battery light came on while you were driving, but before you parked, it could be the alternator. If you didn’t see a battery light, and now the vehicle is dead when you go to start it, the first thing that you need to look at is the battery.
What to look for when your golf is drawing power?
Something is drawing power when it shouldn’t be. If this is the case, the first thing that you are going to want to look at is all of the lights. If your Golf is equipped with a glove compartment light, check and see if it is turning off. Maybe one of the map lights is on? How about all of the accessory plugs? Is something plugged into one of them and drawing power? Any aftermarket accessories? If not, it may be that there is an electrical problem.
