Volvo 2009 S60 - Manual (Page 68)

02 Instruments and controls
Trip computer
02
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5. Current speed in miles per hour
(Canadian models only)
This function provides the driver with an instan-
taneous conversion of the vehicle's current
speed from km/h to mph.
NOTE
Trip computer readings may vary slightly
depending on the circumference of the tires
on the vehicle and driving style.