I can totally understand why you want to do it. I'm a bit of a sucker for all the latest bells and whistles myself, and if there's a way of making the car do something that a higher-spec model does, I'm usually the first to start wondering how it can be done! 😄 Having looked at what would potentially be involved with the Mk4 though, I'm not sure I'd actually go ahead with this one. The thing is, what you've already got isn't really a "lesser" TPMS system in terms of what it's there to do. It uses the ABS/wheel-speed sensors to monitor for a loss of pressure and, if it detects one, it tells you about it. So the important bit — knowing you've got a tyre that's losing pressure — is already covered. To get the actual numbers on the screen, you're potentially looking at four direct TPMS sensors, a receiver and possibly another module/wiring, plus fitting, coding etc. And then, at some point down the line, you've got four little batteries in the wheels that are going to run out and need dealing with. All of that just to change the information from: "There's a problem with this tyre" to: "This tyre is currently at 2.1 bar." And I completely get why you'd want the second one! 😂 It's just that I'm not sure I'd want to spend potentially quite a bit of money and introduce extra hardware into an otherwise perfectly happy car purely to get that information. A decent digital pressure gauge will give you the actual figures whenever you want them, and you can check all four tyres in a couple of minutes before a long journey. If I'd been speccing the car from new and direct TPMS was an option, I'd definitely have ticked the box. But as a retrofit, I'd probably put this one in the "nice to have" column and keep it on the bucket list for the next car. Then when the next Superb comes along, you can tick the box for direct TPMS from the factory or make sure thee used car has it and enjoy watching all four pressures appear on the screen without having to retrofit half the car to make it happen! 😁 That's just my take on it though — if seeing those four numbers on the OEM screen every time you get in the car is going to make you happy, then I completely understand why you'd want to do it. Sometimes that's reason enough!