FYI, DCT parking brake needs TLC too. Found the caliper seized and not moving making rear wheel installation almost impossible. In the pic below the moving parts are left and right of the piston. Caliper needs to move at least half an inch to do it's job. PS. I forgot to mention that the pad spring is inserted wrong in the pic, as I found out later. The two small 'teeth' need to go to the opposite side from the piston. ie. the outside pad is fixed and the pad against the piston needs to move a bit with it.