As they mention, it only disables TC.
I tried that on a track and when I was about to skid all 4 wheels (I entered waaaay to fast on a corner
) the car corrected itself and I could see the icon on de dash blink as the car applied breaks.
Our leons have 3 systems:
- TCS
- ESP
- XDS
The only one you can disable is TCS.
Cheers