AUDI A8 2015 Owner's Manual

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Instruments and warning/indicator lights 19
If the fl indicator light turns on, ESC was re­
stricted using the
[fil button¢ page 197.
Stabilization control (ESC/ABS): Fault! See
owner's manual
If the: G1 indicator light and the ABS indicator
light
tll1 (USA models) I ii] (Canada models)
turn on and the message appears, the ABS or
e lectronic differential lock is ma lf u nction ing.
This a lso causes the ESC to malfunction . The
brakes sti ll function with their normal power,
but ABS is not act ive .
Drive to your authorized Aud i dea ler or quali ­
fied workshop immediately to have the mal ­
function corrected.
A WARNING
If the . (USA models) . (Canada mod­
els) brake system indicator light turns on
together with the ABS and ESC indicator
lights, the ABS/ESC regulating function
may have failed. Functions that stabilize
the vehicle are no longer avai lab le. This
could cause the vehicle to swerve and in­
crease the risk of sliding. Drive carefully to
the nearest authorized Audi dealer or oth­
er qualified workshop and have the mal ­
function corrected .
(D Tips
For additional information on ESC and
ABS, refer to¢
page 197.
ABS!( @)) Anti-lock braking system (ABS)
This warning/indicator light monitors the ABS
and the electronic differential lock (EDL).
The warning/ind icator light tll1 (USA mod-
e ls)
;tlJ (Canada models) will come on for a
few seconds when the ignition is switched on.
The light will go out after an automatic check
sequence is completed.
There is a malfunction in the ABS when:
- T he warning/indicator light does not illumi­
nate when you switch the ignition on. -
The warning/indicator light does not go out
after a few seconds .
- The warning/indicator light il luminates
while driving.
T he ESC indicator lig ht also illuminates if
there is a malfunction in the ABS. The mes­
sage
Stabilization control (ESC/ABS) Fault!
See owner's manual
also appears in the in­
strument cluster display and a warning tone
sounds.
The brake system will still respond even
without the assistance of the ABS system.
See your authorized Audi dealer as soon as
possible to restore full braking performance.
For more information regarding the ABS
¢pag e 197.
Malfunction in the brake system
If the brake warning light¢ page 14 and the
ABS warning illuminate
together there may be
a malfunction in the ABS, and there may a lso
be a malfunct ion in the brake system itself
¢.&. .The ABS will not work and you will no­
tice a change in braking response and per­
formance.
In the event of a malfunction in the brake
system
the warning/indicator light . (USA
models) . (Canada models) in the instru­
ment cluster flashes ¢
page 14.
Malfunction in the electronic differential
lock (EDL)
The EDL works together with the ABS. The
ABS warning light will come on if there is a
malfu nction in the EDL system ¢
page 197.
See your authorized Audi dealer as soon as
poss ible.
A WARNING
-
-If the tll1 (USA models) ;tl] (Canada
models) warning light does not go out,
or if it comes on while dr iving, the ABS
system is not working properly. The vehi­
cle can then be stopped only w ith the
standard brakes (without ABS). You w ill
not have the protect ion ABS provides. ..,.

20 Instrum ent s a nd w arn in g/i ndic ato r light s
Contact your Audi dealer as soon as pos­
sible.
-USA models: If the . war ning light, the
DJ warn ing light and the fi1 warning
light come on together, the rear wheels
could lock up first under hard braking.
Rear wheel lock-up can cause loss of ve­
hicle control and an accident. Have your
vehicle repaired immediately by your au­
thorized Aud i deale r or a qua lified wor k­
shop. Drive slowly and avo id sudden,
hard brake applications .
-Canada models: If the brake warn ing
light ., the
Ji) warning light and the
ABS warning light
[ill come on together,
the rear wheels could lock up first unde r
hard braking. Rear wheel lock-up can
cause loss of vehicle control and an acci­
dent. Have your vehicle repaired immed i­
ately by your authorized Audi dealer or a
qualified wo rkshop. Dr ive slowly and
avo id sudden, hard brake applicat ions.
(0) Worn brake pads
Ei'I Brak e pa ds!
If the warn ing light illum inates, immediately
contact your authorized Audi dealer or quali­
fied workshop to have all brake pads inspect­
ed. O n USA models the wa rning light
Ei'I
comes on together with t he warn ing light •.
Both sets of b ra ke pads on an axle must a l­
ways be rep laced at the same time.
A WARNING
Dr iv ing with bad brakes can cause a colli­
sion and serious personal injury.
- If the wa rning light
Ei'I and the warning
light
. ll with the message Brake pads!
comes on in the instrument cluster dis­
play, immediately contact your author­
ized Audi dea ler or qualified workshop to
have all brake pads checked or rep laced if
necessary.
l ) . : USA mode ls on ly
EPC Electronic power control
Applies to veh icles: w ith gasoline engine
This warning/indicator light monitors the
electronic power control .
The Di warning/ indicator light (Electron ic
Power Control) illuminates when you sw itch
the ignit ion on as a function check.
(D Tips
If this warning/ indicator light illum inates
while you are driving, then there is a mal­
funct ion in the engine electronics. Have
the malfunct ion corrected as soon as pos­
s ible by your authorized Audi dealer or
qualified workshop.
W Glow plug system
Applies to veh icles: w ith diesel engine
The control light illuminates when the glow
plug system is active.
If the II ind icator light illuminates, the glow
plug system is act ive. You should start the en­
gine immediately after the ind icator light
swi tches off. The ind icator lig ht only illum i­
na tes for approximate ly 1 second if the en­
gine is warm or if the outs ide temperature is
above 46 QF (8 QC).
(D Tips
-If the glow plug indicator l ight i llum i­
nates while dr iving, there is an eng ine
cont ro l ma lfunction. The engine should
be checked immed iate ly .
- If the ind icator light does not illuminate
at a ll when switch ing the ignit ion on,
there may be a malfunction in the glow
plug system. The engine should be
checked.
' o Malfunction Indicator Lamp (MIL)
The Ma lfunction Indicator Lamp ( MIL) is part
of the On-Board Diagnost ic (080 II) system.
T he symbo l¢..,, lights up whe n the ignition is ...

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Instruments and warning/indicator lights 21
switched on and will turn off after the engine
has started and has sett led at a constant idle
speed . This ind icates that the MIL is working
properly .
The warning light illuminates when there is a
malfunction in the engine e lectronic system .
Contact your author ized Audi dealer and have
the malfunction corrected .
An improperly closed fuel filler cap may also
cause the MIL light to illuminate
¢page 223.
For mo re in format ion ¢ page 29.
~. Diesel particulate filter clogged
Appl ies to vehicles: with d iesel e ngine and diese l pa rticu ­
late fi lte r
II Particulate filter: System fault See own­
er's manual
When the II symbol illum inates, you can al­
ter your driving style to assist the filter self­
cleaning process. Drive for approximately 15
minutes with the selector lever in the 5 posi­
tion at a minimum speed of 37 mph (60 km/
h) and an engine speed of approximately
2,000 RPM. The temperature increase that
will resu lt from this can burn off the soot in
the filter . The symbol will switch off when the
cleaning is successful. After a successful
cleaning , there is no need to bring the car to
an author ized dealer or qualified workshop
because this is part of normal vehicle ope ra­
tion .
If the symbol
II does not switch off, see your
author ized dealer or other qualif ied workshop
to have the problem corrected.
For more information on the diesel particu­
late filter , refer to¢
page 206 .
.,&. WARNING
Always adapt your speed to the current
weather, road and traffic conditions. You
should never disobey traffic laws in order
to follow driving recommendations.
-
!'1 Engine speed limitation
App lies to veh icles: w it h e ngine speed lim itat io n
II! Engine speed maximum XXXX RPM
The engine speed is automatically limited to
the speed d isplayed in the driver information
system. This protects the engine from over·
heating.
The engine speed limitation deactivates once
the engine is no longer in the critical tempera­
ture range and you have released the accelera­
tor pedal once.
If the engine speed limitation was activated
by an engine control malfunction, the indica­
tor light
13:a also turns on . Make sure that the
speed does not go above the speed disp layed.
Drive to your authorized Audi dealer immedi­
ate ly to have the malfunction corrected.
~v, Engine oil sensor
• Oil level! Sensor defective
If the symbol illum ina tes, contact your au­
thorized Audi dea le r and have the oil sensor
inspected. Until you have this done, check the
oi l level each time you refue l just to be on the
safe side
¢ page 233.
f Request to warm engine by driving
0 Please warm up engine
Fuel has entered the engine o il because of low
outside temperat ures or frequent short
drives . Drive until the engine is warm so that
the fuel in the engine oil will vapori ze. Avoid
high eng ine speeds, full acceleration and
heavy engine load when doing this .
Bu Fuel level indicator
liD Please refuel
If the indicator light turns on for the firs t
time and the message appears, there are
about 4 gallons ( 15 liters) of fuel left in the
tank. Time to refuel
¢page 222 .
Ill Tank system malfunction! Contact dealer IJIJ,

22 Instruments and warning/indicator lights
If the indicator light t urns on and th is mes ­
sage ap pears, the re is a ma lfunction in the
tan k system.
D rive to yo ur aut hori zed Au di dealer i mmedi­
ate ly to have the mal func tion cor rected .
<D Windshield washer fluid level
¢,- $ Please refill washer fluid
If th e sym bol illum inates, add w indshield
washer fluid to the was her system/ headlight
washer system* ~
page 244 .
6 Windshield wipers
m Windshield wiper defective
There is a mal func tion with the w indshield
wipers.
D rive to yo ur authorized Aud i dea le r i mmedi­
a te ly to h ave the mal fu ncti on cor re ct ed .
~ /}D /0$ Defective light bulb warning
J:J-I f the ind icator light tu rns on, a bulb has
failed. The message indicates the location of
the bulb .
Im-if a fog lamp* h as f ailed , the indic ator
lig ht tu rns on to indica te the location on t he
ve hicl e.
IJ -if a rear fog lam p has fai led , the indic ator
li g ht tu rn s o n to in dicat e the locat ion on t he
ve hicl e.
Vehicle lights: malfunction
If the message appea rs, there is a malfunc­
tion in the headlights or light switch .
Drive to yo ur authorized Aud i dea ler immedi ­
ately to have t he malfunction corrected.
A WARNING
- light bu lbs are pressurized and co uld ex ­
plode while they a re being changed caus­
ing ser ious p erso na l in ju ry.
- Work w it h due care when handling the
hig h-voltage section of gas discha rge (
x enon) lights . Failure to do so cou ld re­
sult in death o r serious injury .
(D Tips
Have the b ulb replaced or the conne ct io n
r epaire d by your authorized A udi Se rvice
department.
~0 Headlight range control
1\1 Headlight range control: defective!
If the symbol illuminates, the headlig ht ran ge
control is no lo nger work ing pro per ly . Have
the system checked and repaired at yo ur A udi
dealer.
§0 Adaptive Light
Applies to vehicles: with Adaptive light
FJl Audi adaptive light: system fault
If the indicator light turns on and this mes­
sage appears, there is a malfunct ion in the
adaptive light system. The headlights still
funct ion .
Go to an authorized dealersh ip to have the
headlights o r the co ntrol un it for the Adaptive
Light repa ired.
@:> Light/rain sensor
£1 Automatic headlights /automatic wipers :
system fault
If the indicator light turns on and this mes­
sage appears , the light/ rain senso r is not
f unct ion ing corr ect ly .
For sa fety reasons the low beams are t urned
o n permanently wit h the sw itch in
AUTO .
However, you can continue to turn the lights
on and off us ing the light switch . Yo u can st ill
co ntrol all func tions that a re independent of
t h e ra in sensor th roug h the w indshi eld wipe r
l ever .
Co ntact your aut horized Aud i dea ler as soon
as possible to have the problem co rrec ted .

Instrument s and warning /indicator lights 23
I--: Sport differential
IIJ Sport differential: system fault
There is a malfunction with the sport differen­
tial.
Drive to your authorized Audi dea ler immedi­
ately to have the malfunction corrected.
IIJ Sport differential: overheating
The transmission temperature has increased
sign ificantly due to the sporty dr iving manner .
D rive in a less sporty manner until the tem­
perature returns to the normal range and the
indicato r light switches of .
.&_ WARNING
-
Contact your authorized Audi dealer or a
qualified workshop if the sport different ial
is faulty or ma lfunctioning. The repa ir
must be performed by trained personnel
using the correct oil in order to ensure
safety.
¢ Q Turn signals
The indicator light blinks when you use either
turn signal.
Whenever you use the left Nor the right a
turn signal, the indicator light blinks. When
you use the emergency flashers, both indica­
tor lights flash .
If one of the turn signal light bulbs burn out,
the turn signal will blink tw ice as fast as nor­
mal. Carefully drive to your authorized Audi
dealer immediately to have the malfunct ion
corrected. The indicator light does not indi­
cate a malfunction if a turn signa l on the trail­
er or on the vehicle fails in trailer towing
mode.
(D Tips
For more information on the turn signals,
refer to¢
page 48.
Driver information
display
Overv iew
Fig . 4 Drive r info rmation system in the inst rument
cluster
Fig. 5 Display: examp le of the info rmat ion lin e
The driver information system contains infor ­
mation @ that is displayed on tabs @
¢ fig. 4. The following content is possible de­
pending on vehicle equipment:
@
®
Tab Content
1 Vehicle
functions :
On-board computer ¢ page 25
Efficiency program*¢ page 26
Digital speedometer
Cruise control*¢
page 90
Adaptive cruise control and braking
guard* ¢
page 92
Audi active lane ass ist* <=> page 101
Display darkened ...

24 Instruments and warning/indicator lights
® ®
Tab Content
2 Indicator lights and messages
Warning when a door, the hood or the rear lid is not closed
c:::>page29
Service interval display c:::>page 27
Speed warning system c:::> page 90
3 Night vis ion assistant* c:::> page 111
4 Audio/video
5 Telephone*
6 Nav
igation *
The second and third tabs are only visib le if at
least one indicator light or message is shown
or if that system is switched on.
The status line© is located in the bottom
part of the display
c:::> fig. 4. It displays the ex­
terior temperature, time, selector lever posi­
tion, trip odometer and odometer.
F or some ve hicle functions, you can access the
trip information from the temporary memory
c:::> page 25 in the line(!) c:::> fig. 5 .
.&_ WARNING
-
-Never rely exclusively on the outside
temperature display to determine if a road surface is icy or not. Keep in mind
that road surfaces, especially bridges and overpasses, could be ice covered and
slippery even at an outside temperature
above 41 °F (+5 °().
- Always reduce your speed and drive with
special care in cold weather conditions
when the chance of encountering icy
road surfaces increases.
(D Tips
-You can select the un its used for temper·
ature, speed and other measurements in
the
MMI.
- If the vehicle is stat ionary, or if you are
driving at a
very low speed, the tempera­
ture shown in the display might be
slightly higher than the actual outside temperature.
This is caused by the heat
being radiated from the engine.
- At temperatures below 41 °F
(+ 5 °C) a
snowf lake symbol appears ahead of the
temperature display
c:::> .&. .
-For information on the audio/video and
navigation* functions, refer to the sepa­
rate
MMI owner's manua l.
Operation
The driver information system is operated us­
ing the buttons on the multifunction steering wheel.
en ..,
8
--------± ~
Fig. 6 Multifunction steering wheel: operating the driv ·
er information system
Fig. 7 Driver information system: open ing the vehicle
func tions men u
Operating concept
.,. Switch the ignition on .
.,. To switch between the tabs, press the rocker
switch ® to the left or right
c:::> fig. 6 .
.,. To access additional information below or
above, rotate the thumbwheel @ down or
up .
.,. To confirm a selection, press the thumb­
wheel @.

Instrument s and warning /indicator lights 25
Access ing Vehicle functions
• Se lect the firs t tab with the rocker sw itch
@ .
• Pr ess the button ~-Th e Vehicle functions
menu app ears <=>fig. 7.
• To select a menu item, tu rn and press the
th umbwheel @.
Resetting values to zero
• Se lect the on-board computer / Efficiency
program
menu item in the Vehicle func­
tions
menu.
• You can now select between the long-term
memory and shor t-term memory .
• To reset the values in a memory, press and
ho ld the thumbwhee l
® for one second .
The last function se lected displays when you
switch the igni tion on.
(D Tips
- All stored va lues w ill be lost if the veh i­
cle battery is disconnected.
- Fuel consumptions (average and cur ­
r ent), range and speed are displayed in
metric units on Canadian models .
On-board computer
F ig. 8 I n str u m en t cl uster : fu el co nsumpt io n
You can call u p the following information in
the on-board computer:
- Date
- Drivi ng time (h) from the s hort- term memo-
ry
- Ave rag e consumption in MPG (l/100 km)
from the sho rt-term memo ry - Average speed in m
ph (km/h) from the
short-term memory
- Dis tan ce driven in miles (km) from the
short-term memory
- Cur re nt fu e l c on sump tion in MPG (l/100
km)
- Short-te rm memory overview
- Long-te rm memory ove rview
The short-term memory collects driv ing infor­
mation from the time the ign it io n is switched
on until it is swi tched off . If you continue driv­
i ng withi n two ho urs after sw itch ing the ig ni­
ti on off, the new values are in clu ded when cal­
cu lat ing the current trip info rm ation .
Unlik e the s hort-term memory, t he long-term
memo ry is not erased automatically . You can
sele ct th e time pe riod for evalua tin g trip in­
f ormat io n yo urse lf.
Fo r some vehicle f unctions, you can access t he
t rip informa tion from t he tempo rary memory
i n t he line
(Dr=> page 23, fig . 5.
Fuel consumption
The current fue l cons umption can be d is­
played using a ba r<=> fig.
8. The ave rage con­
s u mption (mpg) stored in the sho rt-term
memo ry is also displ ayed. W he n t he ba r tu rns
green, yo ur vehicle saves fue l by one of the
f o ll ow ing func tions:
- Recuperation : When the v ehicle is coast ing
or dr iving dow nhill, elec trica l energy can be
s to red in the b attery . T he b ar will move to­
ward
0 .
-Cylinder on demand System* : whe n the de ­
mand fo r p ower is low and ot he r co ndit ions
are met, the engi ne au tomatically deacti­
vates fo ur cyli nders (4 .0 T FSI) or s ix cylin­
ders
(6 .3 F SI). The driver and passengers
w ill not even notice th is. The message
4 cyl­
inder mode
(4 .0 TFSI) or 6 cylinder mode
(6.3 FSI) appears under the bar. The cylin­
ders switch on again when mor e powe r is
needed .

26 Instruments and warning /indicator lights
Efficiency program
App lies to vehicles: with efficiency program
Fig . 9 Tri p com puter: ot her equipment
Fig. 10 D isplay: example of a f uel eco no m y message
The effic iency program can help you to use
l ess fuel.
It shows other eq uipment influenc­
ing consumpt ion and fue l economy messages
p rov ide tips f or efficient driv ing . The efficiency
prog ram uses distance a nd consumption data
from tr ip compute r
1.
To display the efficiency program, ca ll up Ve­
hicle functions
and select the menu option
Efficiency program .
Other equipment
Other equipment that is currently affecting
fuel consumption is listed in t he v iew
Con ­
sumer .
The display shows up to three other
items of equipment @¢
fig. 9. The equip ­
ment us ing the most fuel is listed f irst . If
mo re than three it ems using fue l ar e swit ch ed
on, the eq uip ment th at is cur ren tly using the
most fuel is d isp laye d.
A scale @also shows the cu rrent total con­
sumpt ion of all other equ ipme nt.
Fuel economy messages
F ue l economy messages are disp layed when
fue l consumption is increased by certain con- di
tions ¢
fig. 10 . If you follow these fuel
economy messages, you can reduce you r vehi­
cle's consumpt io n of fuel. The messages ap ­
pear automatically and are on ly disp layed in
t h e efficiency program . The f uel economy
messages tu rn
off automatically after a cer ­
ta in period of ti me.
To turn an economy message
off i mmediately
after it appears, press any button on t he mul­
t if u nct ion steer ing whee l.
@ Tips
- If the data are deleted in the efficiency
program , those values a re a lso reset i n
t rip computer.
- Once you have turned a fuel economy
message
off, it will on ly appear agai n af­
ter you turn the ig nition on again .
- The f uel economy messages are not dis­
played in every instance, but rather in in ­
t ervals over a period of time .
Odometer
Fig. 11 Instrume nt cluster O do m eter a nd r eset button
The odometer shows you how many m iles
(k ilomete rs) you have drive n. You can switch
the d isplay from miles to ki lometers and v ice
versa via the MMI.
Upper odometer
The trip odometer shows the distance driven
since it was last reset . It can be used to meas­
u re s hort dista nces . The last digit indicates
1/10 of a mile (100 meters).
You can reset the trip odometer to zero by pressing the Reset button~-

Instruments and warning/indicator lights 2 7
Lower odometer
The lower odometer shows the total number
of miles (kilometers) driven.
Malfunction message
If there is a malfunction in the instrument
cluster ,
DEF will appear in the trip odometer
display area. Contact your authorized Audi
dealer to have the problem corrected.
Time and date display
Fig. 12 Center console : analog cloc k
The date and time are shown in the instru­
ment cluster display ¢
page 23, fig. 4. There
is also an analog clock in the center console
¢fig. 12.
When you open the driver's door, the date and
time appear in the instrument cluster display
for 30 seconds. When the ignition is switched
on, the time is always displayed in the status
line © regardless of the current display.
You can set the time on both clocks and the
date display in the MMI. Refer to the MMI
owner's manual for instructions.
Service interval display
The service interval display reminds you when
your next service is due .
Fig. 13 Instrume nt cluster: Serv ice interva l dis play
The schedule for the next oil change or inspec­
tion is calculated automatically and displayed
accordingly. The display works in two stages:
Service reminder
30 days before the next service is due, a serv­
ice reminder appears in the display when you
switch the ignition on¢
fig. 13.
After about 5 seconds the display switches
back to normal. The distance and time re­
maining are updated each time the ignition is
switched on until the date due for service is
reached.
Service due
When the due date for service is reached, the
message
Service due! appears in the instru­
ment cluster immediately after you switch the
ignition on. Additionally, a warning tone
sounds. After about 5 seconds the display
switches back to normal.
Calling up the service schedules
If or when an oil change or inspection is due,
can be shown in the MMI display by selecting
the service interval display in the car menu.
Select the
I CAR I function button > Car sys­
tems control button > Servicing & checks >
Service interval displays .
Resetting the service interval display
Your authorized Audi dealer will reset the cor­
responding service schedule after performing ..,_

28 Instruments and warning /indicator lights
the app rop riate serv ice on yo ur vehicle. Yo u
a lso have the possibility to reset the oil
change sched ule after having performed an
oil change accord ing to Audi specifications.
Select the
! CAR ! function button> Car sys ­
tems
co ntrol button > Servicing & checks >
Service Intervals > Re set oil change interval.
(D Note
- Only reset the o il change d isp lay when
you hav e completed an o il chang e.
- If you d isconnect t he battery term inals,
no calculations can be made for the serv­
i ce i nterva l display du ring this t ime and
n o s ervi ce rem ind er w ill appea r. Remem­
be r that ob se rvi ng the pr ope r se rvice in ­
te rv als is vitally impor ta nt t o extendi ng
the life o f yo ur vehicle, p articula rly th e
engine, an d main tainin g its va lue . Even i f
the mileage dr iven is low, t he max imum
p eriod of one year from one se rv ice to
the next must n ot be e xceeded.
@ Tips
- The information in the Service Reminder
r ema ins sto red even when the vehicle
batte ry is disconnected .
Head-up Display
Applies to vehicles: with Hea d-up Display
Fig. 14 Examp le: in di cato rs in the Head-up Disp lay
Fig . 15 Instrument pa nel: k nob fo r the Head -up D is ­
p lay
T he Head -up Disp lay projec ts cer tain warnings
or se lected information from the ass istance
systems * or navigation* on the windshie ld.
The display appea rs within t he driver's field of
vision.
Switching on /off
.,. Press the knob~ to switch t he Head -up
Display on/off ¢
fig. 15.
Adjusting the height
The heig ht of th e d is p lay can be adju sted to
t h e i nd ividua l dr ive r.
.,. Mak e s ure you are s eated co rre ctly
co page 134.
.,. Tur n th e kn ob~ to adjust t he di sp lay.
Settings in the MMI
.,. Select: !CARI function button> ( Car) * sys­
tems
co ntrol button > Driver Assist > Head­
up Di splay
> Head-up Display content o r
Di splay brightness .
Display content
In the MMI, you can spec ify w hich information
shou ld be disp layed such as nav igat io n in for­
mation* or Night v is io n assis tant* .
The speed disp lay and some of the red i nd ica­
tor lights cannot be hidden in the MMI.
Display brightness
Y ou can adjust the disp lay br ig ht ness in the
MMI. The d isp lay brightness decreases a uto ­
matically as the amount of light decreases.
The basic level of br ightness is adjusted w ith
t h e instr ume nt ill uminati on
co page 51 . ..,.