To change the cruising speed

See also:

P (Park)
This position is for parking the vehicle and starting the engine. In this position, the transmission is mechanically locked to prevent the vehicle from rolling freely. When you park the vehicle, f ...

Tire chains
CAUTION Tire chains cannot be used on any tires for your Legacy and Outback because of lack of clearance between the tires and vehicle body. ...

Automatic climate control system (if equipped)
NOTE Operate the automatic climate control system when the engine is running. ...