If you wish to conduct maintenance to your UM Matrix II 180 then it will always be a great idea to have access to a Workshop Manual to keep just for personal reference should you need to know how to remove a certain part much like the Brake Pads and fit it again efficiently.
UM Matrix II 180 Workshop Manuals provides identifiable diagnostic guidelines on your car therefore if something is faulty it will help you identify what the issue is and ways to fix it. You will be able to analyse if this can be done by yourself or that the job is simply too big you could make a reservation for your Matrix II 180 in with a local repair garage.
UM Matrix II 180 manual