I got to try it first time today. The control (under and right hand side of steering wheel) has 'OFF' written on it and the light associated with it is off normally when I first turn the ignition on.
I pushed the button for the light to come on and later the skidding car icon came up on the dash. I looked and the switch light had turned itself off.
It didn't seem to matter anyway, the car carried on spinning its wheels no matter if the switch was lit or not.
Is the system on or off when the light is on? (Bearing in mind the word OFF is above the orange light.) I am totally confused!