If you want to execute maintenance on your own UM Matrix II 170 then it will always be a good plan to have access to a Workshop Manual to keep just for personal reference if you want to know ways to take off a particular part for example, the Dashboard and match it again safely.
UM Matrix II 170 Workshop Manuals will give certain diagnostic info for the vehicle therefore if something is playing up it will help you understand what the situation is and ways to correct it. You can then assess if this can be achieved on your own or if the job is simply too big it is possible to make a booking for your Matrix II 170 in with a local friendly mechanic.
UM Matrix II 170 manual