Changing the target speed
When DSR is activated, you can change the target speed to a value between 2 km/h and 18 km/h.
To increase or decrease the target speed:
press rocker switch 
up to the point of resistance for a higher target speed and down for a lower target speed. The selected target speed increases or decreases by 1 km/h and appears with the DSR symbol in the multifunction display.
The target speed always adjusts in 1 km/h increments. This is regardless of whether you press the rocker switch to or beyond the point of resistance.