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Why am i unable to fill up the petrol tank in Audi A4?


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What year model is your A4? There is a fuel vapour vent system in the form of a charcoal canister which collects the fuel vapour. There might be a block in the system. Hence when you try to fill fuel, the air in the tank gets purged back to the filling neck causing the fuel filling spout to shut. So the gas station attendant would need to fill it manually.

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