I have already done this on my 2019 B9 A4, it didn’t come with any of the tools or wheel just the stupid inflation kit.
Check my posting and you will see the full install with pics, be aware the part no.s my be different on the 2020 A4.
If you can find a car with one fitted or get someone to look and see if any parts are even available for a 2020 A4, if not try and borrow them and test fit in your car.
It took me weeks to get this sorted as Audi won’t give you information on parts if they don’t match your chassis number.
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