I'm not a racer, but do not feel the difference between disabled traction and 3rd level. Driving in the city and suburbs, speeds of up to 220 km/h. I put the traction for 3rd level. Occasionally when driving word "TC-3" blinks, wherein the power limitation does not occur. In my city rough roads with pits and tram rails, traction blinks usually in the corners when traveling by road irregularities. Several trips in heavy rain with a disabled traction.
I don't understand why I need it, but just in case it does not turn off.