Volvo 2006 C70 - Manual (Page 42)

Cruise control is also automatically disengaged:
If the speed drops below approximately 20 mph (30 km/h) when driving uphill.
When the brake or clutch pedal is depressed.
If the gear selector is moved to position N.
During wheel spin or wheel lock-up.
If the vehicle's speed is increased by using the accelerator pedal for more than 1 minute.
Returning to the set speed
Press the button to resume the previously set speed.
pg. 43 Instruments and controls
Cruise control
Disengaging cruise control
Cruise control can also be disengaged by:
Pressing the CRUISE button (CRUISE ON will no longer be shown in the function display.
Putting the gear selector in (N)eutral.
WARNING!
Cruise control should not be used in heavy traffic or when driving on wet or slippery roads. Cruise control may not
maintain set speed on steep downgrades.
pg. 44 Instruments and controls
Right-side steering wheel lever
Windshield wipers
A. Windshield/headlight washers
B. Rain sensor (option) - on/off
C. Thumb wheel
D. Not in use