Ducati SPORT TOURING ST3 Manuel D'utilisation Et Entretien page 125

Key-operated ignition switch and steering lock
(fig. 17)
It is located in front of the fuel tank and has four
positions:
A) ON: lights and engine on;
B) OFF: lights and engine off;
C) LOCK: steering locked;
D) P: parking light and steering lock.
Note
E
To move the key to the last two positions, press it
down before turning it. Switching to (B), (C) and (D), you
will be able to take the key out.
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A
B
C
D
fig. 17