If you own a vehicle with an electronic parking brakes, make sure you actuate it from time to time. Otherwise, you may be in for an expensive surprise when it comes time to replace the rear brake pads. A $200 job could easily turn into greater than $1000 due to the parking brake mechanism becoming seized. Actually, the brake should be used every time the car is parked. Frozen parking brakes are due to disuse and just about nothing else. The transmission park position should never be trusted to hold the vehicle. Personally, I know of two instances of failure of the park position in the transmission to hold the vehicle. One resulted in a fatality and another in an injury. The parking brake is there for a reason. Use it and be safe. To get a better idea of what to do and how to fix your brakes, see Robert’s Automotive page on brakes and service.