YKallroad

Not really a problem, just a question. I start the Allroad and it's all good. There's a noise that goes away after ~2 minutes of driving at low speed. It's nothing major, just that the engine gets noticeably quieter.

Does anybody have any ideas what this is? Just curious.

Nialist

Does it start right away as the engine turns over? Does it increase in intensity with accelerator pedal travel? Do a search on SAIP (Secondary air injection pump) and you should be able to find a video with some sounds to compare.