Do not, understand any circumstances… use launch control on a RS5 swapped Allroad with 4 grown ass adults in the car and new Michelin Pilot Sport 275’s all around.
You will deadhook and absolutely shatter the rear diff.
I hope you’re not talking from experience? Most of the internal parts as far as electronics, bearings, and Diff carrier are shared with some others (S5, S6, S7, even A8) but the gearing is RS5 specific (Ring gear & Pinion).