If you want to conduct auto repairs to your Ducati ST 4 S ABS then it will always be a good plan to have a Workshop Manual to keep just for a reference in the event you want to know tips on how to remove a specific component such as the Wheel Bearing and install it again correctly.
Ducati ST 4 S ABS Workshop Manuals will give you unique diagnostic information on your vehicle therefore if something is broken it helps you identify what the issue is and methods to resolve it. You will be able to decide if you can do this by yourself or if ever the job is too big you can make a reservation for your ST 4 S ABS into a nearby mechanic.
Ducati ST 4 S ABS manual