This advanced ECU firmware for the Audi S6 C7 4.0 TFSI (CEUC engine) includes three professionally developed tuning stages: Stage 1 for mild gains, Stage 2 for hardware-optimized boost, and Stage 2+ for maximum power potential with upgraded turbos or downpipes. Built on Bosch MED17.1.1 with software 533498 and SW-Version 0008, the file offers scalable tuning for a variety of hardware setups.