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When All Surface Progress Control (ASPC) system is enabled, the desired target set speed for the vehicle can be set and adjusted. Use the control buttons mounted on the right side of the steering wheel.

  • SET+: Press to enable ASPC to recognise that the desired set target speed for the vehicle, is to be set and adjusted. Press repeatedly, or press and hold, to increase the set target speed, up to a maximum speed of 19 mph (30 km/h). Alternatively, while making progress, press the SET+ button for the vehicle's current speed to be the set target speed.


    If the vehicle is at a standstill, press and hold the brake pedal while using the SET+ button.


    Light and gentle application of the accelerator pedal temporarily overrides the current set target speed. When the accelerator pedal is fully released, ASPC reverts back to the previously selected set target speed.


    The set target speed is displayed in the instrument panel.


    Selecting very low speeds when pulling away on slippery surfaces, can affect the vehicle's ability to make progress. For improved pulling away performance, it is recommended to select a set target speed that is sufficient to maintain the vehicle's progress.

  • -: Press repeatedly, or press and hold, to decrease the desired set target speed, down to a minimum speed of 2.2 mph (3.6 km/h).


    Light and gentle application of the brake pedal also lowers the set target speed. When the brake pedal is fully released, ASPC maintains the speed at which the brake pedal was released. If the brake pedal is pressed when ASPC is active, then a slight pulsation movement might be felt through the brake pedal.

  • RES: Press to resume the set target speed, if the set target vehicle speed has been lowered by gently applying the brake pedal.


    RES should only be used if the driver is aware of the set target speed and intends to return to it.

  • CAN: Press to cancel the set target speed. ASPC exits full function mode and reverts to descent control mode. See USING THE PROGRESS CONTROL SYSTEM.

When the vehicle is traveling at speeds between 19 mph (30 km/h) and 50 mph (80 km/h), ASPC operation is suspended. The system enters into stand-by mode and the ASPC warning lamp flashes. ASPC operation resumes when the vehicle's speed is less than 19 mph (30 km/h), but does not exceed 50 mph (80 km/h). If the vehicle’s speed exceeds 50 mph (80 km/h), ASPC is disabled and the warning lamp extinguishes. If required, ASPC will have to be switched on again.