If you choose to perform auto repairs for your UM Matrix II 170 then it will always be a good plan to have access to a Workshop Manual to use as reference in case that you want to know techniques to take out a certain component such as the Gearbox and install it again accordingly.
UM Matrix II 170 Workshop Manuals offers you targeted diagnostic guides with regards to your car so if something is playing up it can help you find out what the problem is and ways to repair it. You can then assess if this can be achieved on your own or in the event the job is simply too big you could make a reservation for your Matrix II 170 in to a decent garage.
UM Matrix II 170 manual