I have a full 6 sided liner from BMW which was a dealer gift with my old M135i. Liner was far better than the car!
Not sure if VW make one but I use it in the golf and it’s fantastic, covers the seats, sides and has a zip flap which can cover the boot lip if you had a dog for example.
It’s also got a zippo lid just in case you were taking some Diet Coke and mints around the Nurburgring!