There is a plug in tool that you can buy; it is made by Ate and it is called the SBS. I have attached the pdf http://www.ate.fotocentrum.de/ATE_DownloadPDF/136445.pdf and if you search the internet you will find the video showing you how to use the tool. That being said my local dealer has a special incl. SBC vehicles for brake pad change for 125. I have not been able to justify buying one of these b/c I only have 1 SBC vehicle and I have managed to just put 2000 miles over a year and a half.

I would figure 3 hours of labor + parts + bleed for changing all four brake discs and pads.