Audi on Friday announced that it is taking a 100% stake in the Sauber F1 team in preparation for entering F1 in 2026. The automaker announced plans to enter F1 for the 2026 season as both a constructor and power unit supplier in 2022, and bought a stake in Sauber at the start of 2023. In a press release, Audi said it has now reached an agreement…