gl350steve

I have a 2013 GL 350 w/a blutec under the hood. But I am searching for a procedure to collapse the rear calipers which are equipped with an electric e-brake motor that does not allow for a normal 'rear caliper compression tool' to get the job done. I am looking at a three wire motor.... if i give the correct two prongs + and - 'juice' will it do the job? Or even a wiring diagram that explained the connection would helpful.
Thank You in advance for any advice.
I figure there has to be a way to bypass the factory scan-tool option.