To change the cruising speed

See also:

Behavior with key lock-in prevention function non-operational
- If the lock lever is turned to the rear (“LOCK”) position with the driver’s door open and the driver’s door is then closed with the lock lever in that position, the driver’s door is locked. ...

SENSE AND STYLE
Family Friendly (Not Really, Fair, Great, Excellent): Not Really Fun-Factor (None, Some, Good Times, Groove-On): Good Times ...

Horn
To sound the horn, push the horn pad. ...