Increasing Cruise Control set speed:

Follow either of these procedures:
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Move the switch up (to RES+), and hold it. Your vehicle will accelerate. Release the switch up (to RES+) at the speed you want.
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Move the switch up (to RES+), and release it immediately. The cruising speed will increase by 2.0 km/h (1.2 mph) each time you move the switch up (to RES+), in this manner.