Porsche 928 ST1991 Owner's Manual page 43

Auxiliary functions
Pull the control lever to call up auxiliary functions
American measuring units will be changed into metric units by pulling the lever twice within 1 second (this applies only for U.S. specified
vehicles).
* Stop is indicated by a flashing colon.
A four-digit reading appears once the stopwatch has been stopped.
Once the stopwatch has been activated, it continues to run even after the ignition is switched off.
Push the lever down to change from odome-
ter reading to digital speedometer reading
and vice versa.
Push the lever up to select tripmeter 1,
tripmeter II or stopwatch. To reset the trip-
meters, press the zero button in the instru-
ment cluster for at least 2 seconds.
Tapping the button is sufficient for operating
the stopwatch.
Memory cannot be erased
Readings at speeds above 10 km/h (6 mph)
Tripmeter for distance travelled
Tripmeter for interim readings or distances
between refuelling stops
Start: push button for 1st time
Stop: push button for 2nd time
Reset: push button for 3rd time*
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