1999 BUICK RIVIERA Owner's Manual

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2-43
Interior Lamps
Instrument Panel Brightness
By turning the headlamp knob you can make the
instrument panel lights brighten or dim. See
ªHeadlampsº in the Index.
Courtesy Lamps
When any door is opened, several lamps go on. They
make it easy for you to enter and leave the car. To turn
on these lamps without opening the door, turn the
headlamp knob to the right.
Illuminated Entry
Press the UNLOCK button on the remote keyless entry
transmitter and the interior courtesy lamps will come on
and stay on for up to one minute. The lamps will turn off
immediately when pressing the LOCK button on the
transmitter, starting the ignition or activating the power
door locks.
Delayed Entry Lighting
When you open the door to enter your vehicle, the
interior lamps will come on. When you close the door
with the ignition off, the interior lamps will stay on for
25 seconds or until the ignition is turned to an on
position. Note that locking the doors will override the
delayed entry lighting feature and the lamps will turn off
right away.
Theater Dimming
This feature allows for a three to five-second fade out of
the courtesy lamps instead of immediate turn off.
Delayed Exit Lighting
With this feature, the interior lamps will come on for
25 seconds after you remove the key from the ignition.
This will give you time to find the door pull handle or
lock switches when you exit the vehicle.
Parade Dimming
This feature prohibits the dimming of your instrument
panel displays during daylight while your 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, you will be able to dim
your instrument panel displays once again.

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2-44 Perimeter Lighting
This is a Personal Choice feature of your vehicle.
When the UNLOCK button on the remote keyless entry
transmitter is pressed, the headlamps, parking lamps,
back
-up lamps and cornering lamps will come on if it is
dark enough outside according to the twilight sentinel.
This feature can be programmed on or off for each
driver's transmitter.
To turn the feature off:
1. Turn the ignition key to OFF.
2. Press and hold LOCK on the driver's power door
lock switch throughout this procedure. All doors
will lock.
3. Press the instant alarm button on the transmitter.
Perimeter lighting remains on at this time and the
horn will chirp two times.
4. Press the instant alarm button on the transmitter
again. Perimeter lighting is disabled and the horn
will chirp one time.
5. Release the door lock switch. The perimeter lighting
option is now off.To turn the feature on:
1. Turn the ignition key to OFF.
2. Press and hold LOCK on the driver's power door
lock switch throughout this procedure. All doors
will lock.
3. Press the instant alarm button on the transmitter.
Perimeter lighting remains off at this time and the
horn will chirp one time.
4. Press the instant alarm button on the transmitter
again. Perimeter lighting is now enabled and the
horn will chirp two times.
5. Release the door lock switch. The perimeter lighting
option is now on.
This procedure changes the mode for only the
transmitter used to change this setting. The procedure
will need to be repeated for the second transmitter.

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2-45 Front Reading Lamps
These lamps and the interior courtesy lamps will come
on when you open a door, and turn off when you turn
the ignition on. To turn on the reading lamps when the
doors are closed, press the button behind the lamp you
want on. Press it again to turn the lamp off.
Trunk Lamp
When you open the trunk to its full open position, a
lamp will come on inside the trunk. This lamp will
automatically turn off when the trunk is closed.
Battery Rundown Protection
This feature automatically shuts off the interior lamps if
any are left on for more than 10 minutes when the
ignition is off. This will keep your battery from
running down.
This feature also shuts off the exterior lamps if they are
left on for more than 10 minutes when the ignition is off.
You may override this feature for the exterior lamps by
turning the lamps off and then back on after the ignition
is turned to off. If you do this, the exterior lamps will
stay on until you manually turn them off.
If the feature is enabled for the interior and exterior
lamps, all lamps should turn off at approximately the
same time.

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2-46
Mirrors
Inside Day/Night Rearview Mirror
When you are sitting in a comfortable driving position,
adjust the mirror so you can see clearly behind your
vehicle. Grip the mirror in the center to move it up or
down and side to side. The day/night adjustment allows
you to adjust the mirror to avoid glare from the lights
behind you. Pull the tab toward you for night use; push
it away from you for daytime use.
Electrochromic Day/Night Rearview Mirror
(Option)
Your vehicle may have an automatic electrochromic
day/night rearview mirror.
When this feature is turned on, the mirror automatically
changes to reduce glare from headlamps behind you. A
photocell on the mirror senses when it is becoming dark
outside. Another photocell built into the mirror face
senses when headlamps are behind you.
At night, when the glare is too high, the mirror will
gradually darken to reduce glare (this change may take a
few seconds). The mirror will return to its clear daytime
state when the glare is reduced.

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2-47
Mirror Operation
To turn on the automatic dimming feature, press
AUTO. To turn off automatic dimming, press OFF.
The green indicator light will be illuminated when this
feature is active.
Time Delay
The automatic mirror has a time delay feature which
prevents unnecessary switching from the night back to
the day position. This delay prevents rapid changing of
the mirror as you drive under lights and through traffic.
Cleaning the Photocells
Use a cotton swab and glass cleaner to clean the
photocells when necessary.
Electrochromic Day/Night Rearview Mirror
with Compass (Option)
Your vehicle may have 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. A time delay feature prevents rapid
changing from the day to night positions while driving
under lights and through traffic.
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. Use a cotton swab and
glass cleaner to clean the photocells when necessary.

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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.
Compass Operation
Press the COMPASS button 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 should ever appear in the compass
window, 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.

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To adjust for compass variance:
1. Press and hold the COMPASS button located at the
bottom of the mirror until a zone number appears in
the display.
2. Find your current location and variance zone number
on the following zone map.3. 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 compass direction within a few
seconds. (This is the automatic calibration mode.
Drive in a circle to calibrate the mirror. See
ªCompass Calibrationº explained previously.)

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2-50 Power Remote Control Mirror
Your vehicle has an electric mirror control located on
the driver's door armrest.
Move the inner switch to the right (R) or left (L) to
choose either the driver's or passenger's side mirror.
Press any of the four arrow buttons to move the mirror
in the direction desired.Adjust each mirror so you can see the side of your
vehicle and the area behind your vehicle. When the
inner switch is in the center position, the mirrors cannot
be adjusted.
Your vehicle may be equipped with the memory
function. These mirror positions, along with the driver's
seat cushion position, can be stored into memory. See
ªMemory Seats and Mirrorsº in the Index.
Parallel Park Assist Mirror (Option)
The passenger's outside rearview mirror also includes a
tilt
-down feature that operates when the shift lever is in
REVERSE (R). This feature assists the driver with
improved rear obstacle detection.
To enable this feature, move the power remote mirror
switch to the left (L) or center position. Move the switch
to the right (R) to turn this feature off.