You can't get to where you're going from this chart. This chart ONLY tells you the tire pressures for the options given from the factory. The sizes you're seeing there are specific to the tire sizes, not the rim sizes. It shows the different tire options which could have come from the factory.
So, yes, there was a 19" option from the factory, but that is the only information you know. This means some kind of 19" rim will fit on your Audi. You don't know (at least from this chart) what the dimensions of the rim was which supported the tire.
There are four main size components to a rim: diameter; width; offset; bolt pattern. Your best bet to find what are the rim sizes you can use is to do one of three things.
- Visit a tire/wheel store online which has a calculator for you. A lot of them will have a vehicle picker where you can input your car and it will show you what they have available which will fit your vehicle. There's many online I've seen before, so there shouldn't be an issue shopping around. You should also be able to get the correct sizes for your vehicle and go shopping from there.
- Find stock rims for the vehicle which are 19". You can go to the dealership to do this or find some online at eBay or some other place like that.
- Go to a local tire/wheel shop. They'll be able to fit your car without issue.