What is the W button Volvo s40 2003?

The "W" button on the 2003 Volvo S40 is used to engage the winter driving mode. When activated, this mode alters the vehicle's transmission and throttle response to provide better traction in slippery conditions, such as snow or ice. This feature helps prevent wheel spin by starting the car in a higher gear, making it easier to manage power delivery on slippery surfaces.