Don't let the familiar shape fool you. We're told the hardware underneath these test mules seen testing in northern Europe is actually for the next-generation replacements (C9) for the current A6 and S6 models. Likely to be called A7 and S7 when they arrive (as Audi moves to reserve even-numbered designations for E-tron models), the ICE-powered prototypes shown here will eventually wear all-new sheetmetal for production. We expect to see disguised versions of the new bodywork running around...