The must have deleted that from the new manuals. I found no mention of it and called Audi-US to enquire. "Oh, that's a non-specific multi-purpose storage net."
THEY sure don't know anything about umbrellas for the garden gnomes either.
You may have an umbrella holder, but I have a...what they said, now. And they're absolutely sure, there's no accessory sold to fill it.
They've also deleted the multi-purpose hangar hook, so your 2010 is a valuable classic now, loaded with equipment that's no longer available at any cost. (G)
It followed me home. That's my story and I'm sticking to it.