If you have to execute adjustments on your UM Matrix II 170 then it is usually a good plan to own a Workshop Manual to keep just for personal reference in the event that you want to know easy methods to take out a particular part such as the Brake Pads and fit it again appropriately.
UM Matrix II 170 Workshop Manuals offers clear distinct diagnostic information for your car or truck so if something is wrong it will help you figure out what the issue is and easy methods to correct it. You will be able to evaluate if this can be done yourself or if the job is simply too big you could make a booking for your Matrix II 170 in with a local friendly mechanic.
UM Matrix II 170 manual