Scratch-off code on keychain

Hello!

Despite extensive searching, I unfortunately haven't found an answer.

Does anyone know what the purpose of the four numbers is (one of which needs to be scratched off)?
What is the price of replacement keys for VAG vehicles?

One of them seems to be an identification number, but I can't make any sense of the other three.
make.

Thank you very much for your answers.

Hi,

This is the key code. The four-digit number that unlocks it is the code used to program the WFS.