If you have to conduct auto repairs on your own MV Agusta F4 Agostini then it is usually recommended to own a Workshop Manual for a reference in case you want to know ways to strip off a specific component like the Door and install it again in the correct way.
MV Agusta F4 Agostini Workshop Manuals gives you specific diagnostic information for the car so if something is playing up it will help you figure out what the problem is and some ways to make it better. You will be able to evaluate if you can do this yourself or if the job is just too big you could make a reservation for your F4 Agostini in with a suitable mechanic.
MV Agusta F4 Agostini manual