I have early 2016 CX5 supplied with the potentially defective rear calipers that can prevent the e-brake from fully releasing. Just had first experience of e-brake not releasing. After a few tries it released and I will not use it again until the calipers are replaced. Bought two new calipers from Mazda. I've changed calipers on other cars but this is my first time with e-brake. I know about putting EPB in and out of Maintenance Mode and pushing in piston (not turning) - have done this in the past for pad replacement. Here's my question: I expected the new calipers to come from factory with piston fully pushed in so I could install them with the new pads and then take EPB out of Maintenance Mode. However the new calipers do not appear to have the piston pushed in. Does anyone know proper procedure? Should I try to push in the piston? How can I be sure the caliper internals are backed off similar to what would be done by putting it into Maintenance Mode to allow the piston to be pushed in without damaging anything? Hope someone has experience with this and can share.