Final answer:
The correct procedure for parking facing downhill is to park within 15cm of the curb, turn the front wheels into the curb, and apply the parking brake.
Step-by-step explanation:
When parking facing downhill, the correct method is to park within 15cm of the curb, turn the front wheels into the curb or roadside and apply the parking brake. This ensures that if the parking brake fails, the car will not roll into traffic but will be stopped by the curb.