Seat Leon 1.9 TDI 2001: Key Coding After Long-term Use Without Battery

Hello.
How to code the key after using it for a long time without a battery?

Pilot programming instructions. VAG GROUP (Audi, Seat, Skoda, VW).
Two keys must be used to program the remote control.
1. - Put the key in the ignition and turn on the ignition.
2. - Close all the windows and get out of the car.
3. - We close the car.
4. - Insert the key into the driver's door lock with the remote control for programming and press one button open or close for about 3 seconds. The horn should sound to us, although it is not a rule.
5. - Open the car door with the key (not the remote control), remove the key from the ignition. Remote programming process completed. The remote should now be active.
Repeat the same steps when programming the next remote control. Only one remote control can be programmed in one go, no more. By repeating all these steps, you can program four remote controls in succession.

It should be after playing. If you have a key with the right frequency for your module - it should work perfectly.

here is the description for toledo vintages up to 99 try this seat in many models used the same way maybe it will work for you too
it is a scan from a Polish-language book
https://www.elektroda.pl/rtvforum/topic174694.html#3131747
if you don't have points, write to me and I'll give you a pair because it's my file

Thanks very much for the quick help, now I don't have a car, but I'll try tomorrow, I'll just make a key, because I see that I won't do it with one.

What if someone doesn't have a second key??