Space saver tyre sizes

[MikkiJayne]

What's the context behind the search? Did the TTS come with a space saver and it has gone missing, or does it not have a spare at all?

Mercedes use the same pdc and centre bore, but I couldn't vouch for whether a Mercedes space saver would clear Audi brakes. Or indeed, whether a spare from a different model of Audi would clear TTS brakes if the TTS never came with a spare.

I have a C-class space saver in the workshop which came from my Dad's car when we swapped to a full size spare, but I think the tyre might be too small on that. I can check tomorrow.