To change the cruising speed

See also:

Reclining the seatback
  WARNING To prevent the passenger from sliding under the seatbelt in the event of a collision, always put the seatback in the upright position while the vehicle is in motion. Also, do no ...

HD RadioTM Technology (Digital AM and FM Radio) (type D audio)
HD Radio Technology is fueling the digital radio revolution in the United States and around the world. The digital technology enables broadcasters to offer new and unique FM content via HD2 ...

Brake booster
The brake booster uses engine manifold vacuum to assist braking force. Do not turn off the engine while driving because that will turn off the brake booster, resulting in poor braking power. ...