Porsche 928 GTS 1994 Owner's Manual page 46

Auxiliary functions
Pull the control lever to call up auxiliary functions
Push the lever down to change from odometer
reading to digital speedometer reading and vice
versa.
Readings at speeds above 10 km/h (6 mph)
Push the lever up to select tripmeter I, tripmeter
II or stopwatch. To reset the tripmeters, press
the zero button in the instrument cluster for at
least 2 seconds.
Tapping the button is sufficient for operating the
stopwatch.
Tripmeter for distance travelled
46
Tripmeter for interim readings or distances be-
tween refuelling stops
Start: push button for 1st time
Stop: push button for 2nd time
Reset: push button for 3rd time
Stop is indicated by a flashing colon. A four-digit
reading appears once the stopwatch has been
stopped. Once the stopwatch has been acti-
vated, it continues to run even after the ignition
is switched off.
American measuring units will be changed into
metric units by pulling the lever twice within 1
second (this applies only for U.S. specified ve-
hicles).
Zero button
This button is used to operate the stopwatch
and to reset the tripmeter I and II. The button
must be pressed for at least 2 seconds to reset
the tripmeter.
Tapping the button is sufficient for operating the
stopwatch.
(see also "Information system")