Volvo 2009 V50 Owner's Manual page 67

ACTUAL SPEED (Canadian models only)
This function provides the driver with an instan-
taneous conversion of the car's current speed
from km/h to mph.
NOTE
Trip computer readings may vary slightly
depending on the circumference of the tires
on the car, tire inflation, or driving style.
02 Instruments and controls
Trip computer
02
67