I love getting new tyres. Not the cost of course but knowing you're riding on new rubber in the best condition. At least until its done a few miles on our pock marked roads.
Something new to me is the addition of thick foam pads stuck to the inner face of the tyre tread surface (see pict.) Sound proofing I guess.
On the D4 some idiot at Audi HQ decided it was acceptable to locate the wheel locking nut underneath the spare. With the only way to access it by removing the spare, which is an unwieldy and heavy object.
Naturally owners, once having experienced it, avoid the inconvenience by keeping the nut key elsewhere. Consequently I could not find it, and Audi were no help with a replacement.
Fortunately it turned up in a niche inside the glove box. I've now put it with the spare, but on top not underneath.