1999 CADILLAC DEVILLE display

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2-46
Light Sensor
The light sensor for the DRL and the Twilight Sentinel
is located in the center of the front defogger grille. If
you cover the sensor, it will read ªdarkº and the lamps
will come on.
Exterior Lighting Battery Saver
If the manual parking lamp control has been left on, the
exterior lamps will turn off approximately 10 minutes
after the ignition is turned to LOCK or ACCESSORY.
This protects draining the battery in case you have
accidentally left the headlamps or parking lamps on. If
you need to purposely leave the lamps on for more than
10 minutes with the ignition in LOCK or ACCESSORY,
turn the manual control knob off and then back on. To
delay the lamps from turning off, see ªTwilight
Sentinelº in the Index.
Interior Lamps
Instrument Panel Intensity/Brightness
Control
The digital displays automatically dim when it becomes
dark outside and your lights are on. When it's dark, the
brightness control can be manually adjusted by turning
the lamp control knob counterclockwise to dim and
clockwise to brighten the lighting. The digital displays
automatically brighten when it becomes light outside,
although backlighting will remain active at the selected
brightness as long as the lights are on.

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2-47 Courtesy Lamps (DeVille Only)
The courtesy lamps are located in the roof in the rear
seat. These lamps come on with the control lamp knob
or when any door is opened and it is dark outside.
Illuminated Entry
The illuminated entry system turns on the courtesy
lamps and the backlighting to the door switches and to
the lamp control knob when a door is opened or if you
press a remote keyless entry transmitter button. Since
the illuminated entry system has a photocell, this means
that it must be dark outside in order for the courtesy
lamps or backlighting to turn on. The courtesy lamps
turn off approximately 20 seconds after the last door is
closed or after the ignition key is placed in the ignition.
Parade Dimming
This feature prohibits dimming of the digital displays
during daylight while the headlamps are on. This feature
operates with the light sensor for the Twilight Sentinel and
is fully automatic. When the light sensor reads darkness
outside, the digital displays can be adjusted by turning the
lamp control knob counterclockwise to dim and clockwise
to brighten lighting. Backlighting to the instrument panel
will turn on regardless of light conditions.
Reading Lamps (DeVille d'Elegance and
DeVille Concours Only)
The reading lamps are located in the roof. These lamps
come on automatically when any door is opened and it is
dark outside. For manual operation, press the button to
turn them on. Press it again to turn them off.
If the reading lamps are left on, they automatically shut
off 10 minutes after the ignition has been turned off.

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2-49
Mirrors
Electrochromic Day/Night Rearview Mirror
with Compass
Your vehicle has an electrochromic inside rearview
mirror with a compass.
When set in the MIRROR position, this mirror
automatically changes to reduce glare from headlamps
behind you.
The mirror also includes an eight
-point compass
display in the upper right corner of the mirror face.
When on, the compass automatically calibrates as the
vehicle is driven.When cleaning the mirror, use a paper towel or similar
material dampened with glass cleaner. Do not spray
glass cleaner directly on the mirror as that may cause the
liquid cleaner to enter the mirror housing.
Mirror Operation
The right side of the button, located at the bottom of the
mirror, turns the electrochromic mirror on and off. To
turn on the automatic dimming feature, press MIRROR.
To turn off automatic dimming, press MIRROR again.
The green indicator light will be illuminated when this
feature is active.

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Compass Operation
Press COMPASS once to turn the compass on or off.
When the ignition and the compass feature are on, the
compass will show two character boxes for
approximately two seconds. After two seconds, the
mirror will display the compass heading.
If, after two seconds, the display does not show a
compass heading (ªNº for North, for example), there
may be a strong magnetic field interfering with the
compass. Such interference may be caused by a
magnetic antenna mount, magnetic note pad holder or a
similar magnetic item.
Compass Calibration
If the letter ªCº appears in the compass display, the
mirror may need calibration.
The mirror can be calibrated in one of two ways:

Drive the vehicle in circles at 5 mph (8 km/h) or less
until the display reads a direction, or

Drive the vehicle on your everyday routine.Compass Variance
The mirror is set in zone eight upon leaving the factory.
It will be necessary to adjust the compass to compensate
for compass variance if you live outside zone eight.
Under certain circumstances, as during a long distance
cross
-country trip, it will be necessary to adjust for
compass variance. Compass variance is the difference
between earth's magnetic north and true geographic
north. If not adjusted to account for compass variance,
your compass could give false readings.
To adjust for compass variance:
1. Use the COMPASS button located at the bottom of
the mirror.
2. Press and hold the COMPASS button until a zone
number appears in the display.
3. Find your current location and variance zone number
on the following zone map.

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4. Press the COMPASS button on the bottom of the
mirror until the new zone number appears in the
display. After you stop pressing the button, the
display will show a ªCº in the direction display
within a few seconds. (This is the automatic calibration
mode
-- you'll need to drive in a circle to calibrate the
mirror. See ªCompass Calibrationº following.)
Power Remote Control Mirror (Heated)
The control on the
driver's door armrest
operates both outside
rearview mirrors. Rotate
the control knob to choose
the right or left mirror.
To adjust the mirror, push the control knob in the
direction you want the mirror to go. Adjust each mirror
so you can see the side of your vehicle and the area
behind your vehicle.
When you operate the rear window defogger, it also
warms both outside mirrors to help clear them of fog
or ice.
The mirrors can also be programmed for personalization
if you have the optional memory package. For more
information, see ªMemory Seat and Mirrorsº in
the Index.

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2-77 Fuel Gage
Digital Cluster Analog Cluster
The fuel gage shows approximately how much fuel is in
the tank. It works only when the ignition is in RUN.On the digital cluster, if the fuel level is within
approximately 2 gallons (7.6 L) of being full, the letter
ªFº is shown. If the fuel supply gets down to
approximately 3 gallons (11.4 L), the number ª3º will
be displayed on the fuel gage, and the FUEL LEVEL
LOW message will appear on the Driver Information
Center (DIC). (On the analog fuel gage, the FUEL
LEVEL LOW message will also appear.) If the fuel
level is less than approximately 3 gallons (11.4 L) from
being empty, the letter ªEº is shown.
Here are a few concerns some owners have had about
the fuel gage. All of these situations are normal and do
not indicate that anything is wrong with the fuel gage:

At the gas station the gas pump shuts off before the
gage reads F.

It takes more (or less) gas to fill the tank than the
gage said. For example, the gage read 8 GALLONS
(30 L), but it took more (or less) than the tank's
remaining capacity to fill it.

The gage may change when you turn, stop or
speed up.

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2-78 Fuel Data Panel
Digital Cluster
For vehicles equipped with an analog cluster (not
shown), fuel data can be obtained by pressing the
SKIP INFO button. See ªAnalog Control Buttonsº
in the Index.
The fuel data panel tells you all you need to know about
the fuel economy and how far you can travel with the
fuel remaining.Press the AVG button to display the average mile per
gallon (AVG MPG). You can also display it in metric
units by pressing the ENG MET button.
When AVG MPG is selected, the total distance is
divided by the total fuel used.
When the INST button (Instantaneous Fuel Economy) is
selected, you will see what the fuel economy is at that
instant. The computer takes a new reading twice every
second. It will show economy up to 70 miles per gallon
(or 2 L per 100 km).
To reset the average fuel economy, press the
INFORMATION SKIP button until the AVG MPG is
displayed on the Driver Information Center (DIC). Press
and hold the RESET NO button until both the fuel data
center and DIC display reads 0.0.
The RANGE display shows how far the computer thinks
you can travel with the fuel that is in the tank. The
computer does not know what driving conditions will be
like for the rest of your trip, so the range is estimated
based on the recent fuel economy. Therefore, the range
reading may change as your driving habits change.
Going from city to highway driving may increase the
range reading.
If the range display shows LO, you should stop for fuel
as soon as possible.

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Driver Information Center (DIC)
This display gives you the status of many of your
vehicle's systems. The DIC is also used to display driver
personalization features and warning/status messages.
DIC Controls and Displays
Digital Control Buttons (DeVille and DeVille
d'Elegance Only)
DISPLAY ON/OFF: Pressing this button will turn off
the DIC, Electronic Climate Control (ECC), fuel data
center, the fuel gage, trip odometer and odometer. While
the displays are off, pressing the INFORMATION SKIP
button will only turn on the DIC. If the TRIP YES
button is pressed or the fuel level falls below four
gallons (15.2 L), all of the displays will come back on.
ENG/MET: You can change the display from English
(miles) to metric (kilometers) by pressing this button.
The same button also changes other readings (like
temperature, fuel and odometer).
TRIP YES: By using this button, you can tell how far
you've gone since you last set the trip display back to
zero. To reset, press and hold the button until zeros
appear. If your vehicle is domestic, the trip odometer
will return to zero after 999.9 miles (1 609 km). If your
vehicle is Canadian, the trip odometer will return to zero
after 1 999.9 km (1,242 miles).
INFORMATION SKIP: Pressing this button
repeatedly will display the MPG AVG, GAL FUEL
USED, AVG MPH, ENGINE RPM, BATTERY
VOLTS, COOLANT TEMP and OIL LIFE LEFT.