* Pressing the brake pedal: This is the primary way to disengage cruise control.
* Pressing the clutch pedal (if manual transmission): Same as the brake pedal; disengages the system.
* Turning the steering wheel sharply: This will usually disengage the system.
* Manually turning off the cruise control switch: The switch itself often has a button or lever to cancel it.
Therefore, there's no single switch to *deactivate* it, it's deactivated through normal vehicle operation. The cruise control switch itself performs both activation and deactivation functions.
