2005 Buick Century Owner's Manual - Page 84

Ignition Positions With the ignition key in the ignition, the key can be turned to five different positions: B (LOCK): This is the only position in which the ignition key can be inserted or removed. This position locks the ignition and transaxle. It is a theft-deterrent feature. Notice: If your key seems stuck in LOCK and you can not turn it, be sure you are using the correct key; if so, is it all the way in? If it is, then turn the steering wheel left and right while you turn the key hard. Turn the key only with your hand. Using a tool to force it could break the key or the ignition switch. If none of these works, then your vehicle needs service. C (OFF): In this position the engine is off. Use the OFF position if the vehicle must be pushed or towed. D (RUN): This position is where the key returns to after the vehicle is started. This position displays some of the warning and indicator lights. E (START): This position starts the engine. A (ACCESSORY): This position lets the radio and windshield wipers operate when the engine is off. To use ACCESSORY, push in the key and turn it counterclockwise. A warning chime will sound when the driver's door is opened if the ignition is in OFF, LOCK or ACCESSORY and the key is in the ignition. 2-18