1997 Buick Century Owner's Manual - Page 82

Rear Door Security Locks Your Buick is equipped with rear door security locks that of help prevent passengersfrom opening the rear doors your vehiclefrom the inside.To use one of these locks: 1. Open one of the rear doors. 2. On the inside of the rear door will be a lock. Insert your key into this lock and rotate it upward. This will engage the safety lock. 3. Close the door. 4. Do the same thing to the other rear doorlock. The rear doors of your vehicle cannot be opened from the inside when this feature isin use. If you want to open the rear door when the security lock is on, unlock the door from the inside and then open the door from the outside. 2-6