The contact owns a 2008 Ford Escape. The contact stated that upon arriving to her destination and pulling into a parking lot, after shifting the vehicle into park(P), the vehicle inadvertently lost electrical power and all electrical functionality, and the contact became locked inside the vehicle. The contact stated that the failure had occurred three times. Due to the failure, the contact was unable to exit the vehicle and suffered heat strokes during a hot summer day. No warning lights were illuminated. The vehicle was taken to the dealer, but the dealer was unable to provide the cause for the failure. The contact stated that the mechanic at the dealer was also locked inside the vehicle due to the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 148,000.