Cadillac 2007 XLR - Manual (Page 92)

Automatic Transmission Operation
There are several different positions for the shift
lever.
PARK (P): This position locks the rear wheels. It
is the best position to use when you starting
the engine because your vehicle cannot move
easily.
{ CAUTION:
It is dangerous to get out of your vehicle
if the shift lever is not fully in PARK (P)
with the parking brake firmly set. Your
vehicle can roll.
Do not leave your vehicle when the engine
is running unless you have to. If you have
left the engine running, the vehicle can
move suddenly. You or others could be
injured. To be sure your vehicle will not
move, even when you are on fairly level
ground, always set your parking brake
and move the shift lever to PARK (P). See
Shifting Into Park (P) on page 99.
Be sure the shift lever is fully in PARK (P) before
starting the engine. Your vehicle has an
automatic transmission shift lock control system.
You have to fully apply the regular brakes first and
then press the shift lever button before you can
shift from PARK (P) when the vehicle is running.
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