If you need to conduct maintenance for your Ducati 350 Mark 3 D then it will always be recommended to have a Workshop Manual to keep just for reference if perhaps you want to know simple methods to remove a specific part much like the Brake Discs and match it again perfectly.
Ducati 350 Mark 3 D Workshop Manuals provides special diagnostic info for your vehicle therefore if something is faulty it can help you understand what the problem is and some ways to fix it. You can then assess if this can be done by yourself or in case the job is too big you can make a reservation for your 350 Mark 3 D into a trusted mechanic.
Ducati 350 Mark 3 D manual