Quattro brings 4 wheel drive and nothing else AFAIK.
Yes that’s my understanding too. Sadly we aren’t allowed an S-Line Quattro, just one or the other. We can’t be seen to be having our cake AND eating it, can we?!
Incidentally, I’m still trying to find out about the rear seat split arrangement on a Q4 Sport, after being given conflicting information from our local dealer vs the online configurator. I’ve tried to contact Audi UK but their phone lines are useless (first you get a robot, then when you eventually get through to a person you just get cut off). I also tried their Messenger, but after an initial response “Thank you for reaching out to Audi UK” (god I hate that phrase, what’s wrong with “contacting”?!) they mistakenly assumed I was enquiring about a used car “could you please provide us with the vehicle registration number?” and then, once I’d told them it was a new car I was interested in, failed to respond at all.