Cadillac 2007 CTS, Owner'S Manual, Page: 112 / 518

Ignition Positions
With the key in the ignition switch, you can turn
the key to four different positions.
Notice: Using a tool to force the key from its
cylinder could cause damage or break the
key. Use the correct key and turn the key only
with your hand. Make sure the key is all the
way in. If it is and you have a manual
transmission vehicle, turn the steering wheel
left and right while you turn the key hard.
If none of this works, then your vehicle needs
service.
A (OFF): This is the only position in which the
key can be inserted or removed. This position
locks the ignition and shifter on automatic
transmission vehicles, and the ignition and steering
wheel on manual transmission vehicles.
B (ACCESSORY): This position allows you to use
things like the radio and the windshield wipers
when the engine is off. This position will allow you
to turn off the engine.
C (ON): This position is for driving. If your vehicle
has an automatic transmission and you turn off
the engine, the transmission will lock. If you need
to shift the transmission out of PARK (P), the
ignition key has to be in ACCESSORY or ON.
The battery could be drained if you leave the key
in the ACCESSORY or ON position with the
engine off. You may not be able to start your
vehicle if the battery is allowed to drain for
an extended period of time.
D (START): This position starts the engine.
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