When you bought the car, the 4S store salesman should have told you
I came back to read the manual myself
The car was given to the old man to drive and I'm now riding a bicycle
Well, it's not necessary to say much to answer the question is the key
The W button is for anti-skidding, and it's OK to press it down in the winter when you're running in snow
Principle is to control the engine speed with the transmission, even if you step on the gas very much. The principle is to control the engine speed with the gearbox, even if you press the gas pedal very hard, the car can not get up fast, to avoid the tires idling and lead to skidding.
But I feel that this is mainly for low-speed use, high speed is not necessary to open, and a long time cost of fuel.
When you turn it on: put the gearbox into D, press the W button, the green indicator light will come on, and you will enter the anti-skid mode.
When off: press the button again, the indicator light is off, normal driving status.
When the vehicle is moving, you can press the button, don't worry.