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How to check for common issues with the fuel system in an Audi A4?

I recently bought a used Audi A4 and want to make sure there are no issues with the fuel system. Can someone provide steps on how to check for common problems or potential malfunctions?

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One common issue with the fuel system in Audi A4s is a faulty fuel pump. When starting the car, listen for any unusual noises coming from the fuel tank. If you hear a loud humming or whining sound, it could indicate a problem with the fuel pump.

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