Cadillac 2011 DTS Owner's Manual page 190

There are two accessory power outlets in the rear seat
area located on the door armrests next to the ashtrays.
Remove the cover to access and replace when not
in use.
The accessory power outlet can be used at any time.
Power is always supplied to the outlets. Do not
leave electrical equipment plugged in when the
vehicle is not in use because the vehicle could
catch fire and cause injury or death.
Certain accessory power plugs may not be compatible
with the accessory power outlet and could overload
vehicle or adapter fuses. If a problem is experienced,
see your dealer.
4-32
When adding electrical equipment, be sure to follow
the proper installation instructions included with the
equipment. See Add-On Electrical Equipment on
page 6 102.
The analog clock is located on the instrument panel
above the radio. The clock is not connected with any
other vehicle system and runs by itself. To adjust the
clock:
1. Locate the adjustment button directly below the
clock face.
2. Push and hold the adjustment button to advance
the clock hands. Holding the button down will
cause the clock to advance faster. Release the
button before reaching the desired time.
3. Push and release the button to increase the time
by one minute increments until the desired time is
reached.