So my RS3 went into Audi yesterday due to a ticking sound coming from the exhaust when car is in cold start mode. Turns out it is a known Audi fault and they will contact me again once a resolution is known. It only does it from cold, as soon as the revs drop and the car goes into comfort mode the sound stops. Worth checking for those not yet picked up your cars. Hopefully Audi can find a solution ASAP! I'll post a video of the issue later..