If you want to change the brakes, you will have to have a cable from Ross Tech and a laptop computer to run the motor to open up the brakes for servicing.
Go to:
http://ross-tech.com/ and check them out.
Otherwise, you will have to go to the dealer and this will cost you at least twice the cost of getting the cable and program (program is included with the cable!).
I bought the cable and with my laptop I can diagnose most anything as well as change the brakes!