Not sure if this is true for A7, but if the A5 B8 was overfilled with oil, it could enter the bottom of air filter housing which directly in line is the MAF sensor that will cause the static fault light if dirty 🤔
Maybe someone can confirm or deny this.
Either way, I'd be tempted to spend £12 and 10 minutes removing and cleaning the MAF sensor. Won't do any harm.