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Proper replacement of most Mercedes with rear ( Electric parking actuator) brake pads.
****( Make sure the doors are closed when you are putting the cars computer in maintenance mode.)****
also # Do not press "replace brake pad" button twice. it will pop out the brake piston out.
Thanks @pacificrimstudio9090 for this info.
Release parking brake and insert stoper on both front wheels to avoid car rolling either forward or backsword
1. Loosen the lug bolts (you need ground resistance to turn the bolts, lesson learnt)
2. Put the EBP in pad replacement mode to disengage the caliper piston procedure: go inside the car and make sure all doors closed and push Start button on time, and toggle the back button until it goes to the mileage, first press and hold phone call button and then press and hold OK button at the same for 5 seconds. The cluster shows up vehicle DATA, move down to pad replacement position and hit OK and the cluster shows up: to move to fitting position and press Ok and get out car
3. Raise and remove the tire
4. remove the caliper and pad, push back piston with tool Replace the pads and reassemble the caliper on to the rotor (grease the retaining bolts, wear indicator, etc.)
5. Pump brakes until you feel the resistance
6. Reengage the EBP (similar to #2 above)
7. Yes of course, mount the tire and lower the vehicle
8. Repeat on the other side :)