The 19" wheels S-Line (standard) I think are fine (without Drive Select). Yes, the ride is firm but I like it.
Potential problems are when you go to the 20" wheels the ride feels harder.
It's all so subjective as one of the original members Nova Invicta sold his S-Line with 19" wheels as he couldn't get on with what he considered a harsh ride whereas others on here including me think it's great.
If you're really concerned I think the Audi Drive Select option becomes a must have!
Potential problems are when you go to the 20" wheels the ride feels harder.
It's all so subjective as one of the original members Nova Invicta sold his S-Line with 19" wheels as he couldn't get on with what he considered a harsh ride whereas others on here including me think it's great.
If you're really concerned I think the Audi Drive Select option becomes a must have!