Ducati ST4S ABS Owner's Manual page 50

Unscrew 2 of the 4 lower screws (2, fig. 43) that hold the
body panels together and to the central air conveyor.
Remove the lower body panels.
E
Instrument panel side guards (fig. 44)
Remove the screw in the centre (3) joining the two side
guards together and the two screws (4) that secure them
to the inner headlight fairing.
Note
These screws have nylon washers (5).
50
4
5
2
fig. 43
3
fig. 44