2006 E350 Brake Pad Replacement Question

[Phalcon51]

My rear brake pads and rotors need to be replaced and I was hoping to do the job myself. However, I just learned that the electric booster pump system on this model can energize and actuate the braking system if the car is jacked up or when the E-brake is released, which I would have to do to remove the rotors. Apparently, this could result in the pistons being pushed out of the calipers when removed and brake fluid leaking out. Obviously not something I want to deal with. Is there a tool I can buy to interface with the car's computer to deactivate the braking system? I really can't afford to take it to the dealer as they want $500 just in labor to replace pads and rotors.

Any help is appreciated.

Gary