Removing the fuel sensor
Important: the fuel tank must be filled to a maximum of 2/3, otherwise the fuel will spill out!
Pull back the luggage compartment carpet.
Unscrew the black protective cover.
Remove the multi-pin plug.
Mark and remove drain and vent pipes.
Unscrew the fuel supply line.
Loosen the plastic cap nut. Most of the time it sits very tight. Therefore, in Audi repair shops, a special key is used to remove it.
In the absence of this key, proceed as follows: you need to put a possibly blunter screwdriver on one of the ribs of the nut and loosen the nut with light hammer blows on the handle rod. Apply to other faces as needed.
Left: First step to removing the fuel gauge. Protective cover (1) unscrewed. Now you can remove the multi-pin plug (2),fuel feed line (3) and drain pipe (4), and ventilation duct (5).
Right: A plastic union nut is unscrewed with a special tool (2) using a ratchet (1).
Mark the relative position of the sensor and the tank. Now the fuel gauge can be lifted up a little.
Remove the fuel line from the inside of the fuel sensor and disconnect the fuel sensor plug.
Moisten the sealing ring of the protective flange with fuel before installation.
Follow the markings when installing the fuel sensor so that the pipe fittings point in the right direction and the sensor float is located correctly.
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