window AUDI A7 2012 Owner's Manual

160 Airbag system
larger, unclosed openings in the door
panel.
- Never drive w ith inter ior door trim pan­
e ls removed.
- Never drive when parts have been re­ moved from the ins ide doo r panel and
the openings they leave have not been p roperly closed.
- Never d rive when loudspeakers in the
doors have bee n removed unless the
spea ker holes have been properly
closed.
-Always ma ke certa in that openings are
covered or fi lled if additional speakers
or other equipment is installed in the
inside door panels.
- Always have work on the doors done by an authorized Audi dealer or qualified
workshop .
Side curtain airbags
Description of side curtain airbags
The side curtain airbag system can provide
supplemental protection to properly restrain ­
ed occupants.
Fi g. 14 9 Side curtain airbags, dri ver 's side: s ide curta in
a ir bag location
The s ide curtain airbags are located on both
sides of the interior above the front and rear
side windows ~
fig. 149. They are ident ified
by the word "AIRBAG" on the windshield
frame and the center roof p illar.
The s ide curtain airbag system supplements
the safety belts and can help to reduce the risk of injury for occupants' heads and upper
torso o n the side of the vehicle tha t is struc k in
a side collision . The side curtain airbag in­
flates in side impacts and only when the vehi­
cle acceleration registered by the control unit
is high enough . If this rate is below the refer­
ence value programmed into the control unit,
the side airbags will not be triggered, even
t h ough the car may be bad ly damaged as a re­
su lt of the co llision .
It is not possib le to de­
fine an airbag triggering range that will cover every possib le ang le of impact, s ince the cir­
cumstances will vary cons iderably between
one collision and another. Important factors
include, for example, the nature (hard or soft)
of the impacting object, the angle of impact,
vehicle speed, etc.~
page 161 , How side cur­
tain airbags work .
Aside from their normal safety function, safe­
ty be lts work to help keep the driver or front
passenger in position in the event of a colli­
sion so that the side curtain airbags can pro­
vide protection .
The airbag system is not a substit ute for your
safety belt. Rather, it is part of the overall oc­
cupant restraint system in your vehicle. Al­
ways remember that the a irbag system can
only help to protect you if you are wear ing
you r saf ety belt and wearing it properly . This
is anothe r reason why yo u should always wear
yo ur safe ty belts, no t just because the law re ­
quires yo u to do so
q page 128, General
notes .
It is important to remember that w hile the
s ide cur tain airbag system is designed to help
reduce the likelihood of ser ious injur ies, other
injuries, for example, swelling, bruising, fric­
tion burns and minor abrasions can also be as­
sociated with these airbags upon dep loyment.
Remember too, these airbags will deploy only
once and only in certain kinds of accidents -
your safety belts are always there to offer pro ­
tection.
The side curtain airbag sy stem basic ally
cons ists of:
- The electronic control module and external
side impact sensors ..,..

-The side curtain airbags above the front and
rear side windows
- The airbag ind icator light in the instrument
pane l
The a irbag system is monitored elect ro nic ally
to make certain it is f unct io ni ng proper ly a t all
times. Eac h time you switch on the ignition,
the airbag system indicator light wi ll come on
for a few seconds (se lf diagnost ics) .
The side curtain airbag is not activated:
-if the ign ition is swit ched off,
- i n s ide coll isions when the accelerat ion
measured by the sensor is too low,
- in rear-end collisions .
_& WARNING
-Sa fety belts and t he a irbag system w ill
only p rov ide p rotection whe n occu pan ts
are in the proper sea ting posit ion
¢ page SO, General recommendations.
- If the airbag indicator light comes on
when the veh icle is being used, have the
system inspected immediately by your
authorized Audi dealer. T he side curtain
airbag may not work properly even when
the vehicle acceleration in a side coll is ion
is h igh enough to act ivate the airbag.
How side curtain airbags work
Side curtain airbags can work together with
side airbags to help reduce the risk of head
and upper torso injuries for occupants who
are properly restrained .
Fig . 150 Illust rat ion of pr inc ip le: In flated side cur ta in
airbags on t he left s ide
.
A irba g sy stem 161
The side c urtain airbags infla te between the
occupant and the windows on the side of the
vehicle that is struck in a side coll is ion
¢ fig. 150.
When the system is trigge red, t he side curta in
airbag is filled with propellant gas and breaks
th ro ugh a seam above the front and rear side
windows identified by the AIRBAG labe l. In or­
der to he lp provide this additional protection,
the side curta in a irbag must inflate withi n the
blink of an eye at ve ry hig h speed and with
great fo rce . T he side curta in a irbag could in­
j u re yo u if your sea ting posit io n is not proper
o r u pright or if items are loca ted in t he a rea
where the supplemental side curta in a irbag
in flates . This applies especially to chi ldren
~ page 163 .
Although they are no t a soft p illow, side cur­
ta in a irbags can "cushion" the impact and in
this way they can help to reduce the risk of in­
j u ry to the head and the uppe r part of the
body.
A fine dust may deve lop when the airbag de­
ploys . This is qui te no rma l and does not mean
there is a fire in the vehicle .
Important safety instructions on the
side curtain airbag system
Airbags are only supplemental restraints . Al­
ways properly wear safety belts and ride in a
proper seating position.
There is a lot that you and your passengers
must know and do to help the safety belts and
airbags do t heir job to provide supplemental
protection .
_& WARNING
=
Improperly wea ring safety belts and im­
p roper seating posit ions increase the risk
of ser ious perso nal inj ury and death when­
ever a vehicle is being used.
- Never let occupa nts pla ce any pa rts of
thei r bo dies in t he area fro m whi ch the
side curt ain air bag inf late.
-

162 Airbag sys tem
-Always make sure that the side curtain
airbags can inflate w ithout interference .
- Use the built-in coat hooks only for light­
weight clothing . Never leave any heavy or
sharp-edged objects in the pockets that
may interfere with airbag deployment
and can cause personal injury in a colli­
sion .
- Never use hangers to hang clothes on
the hooks .
- Only use factory-installed sun shades or,
if shades installed after the vehicle
leaves the factory, use only genuine Audi
sun shades.
- Never swing the sun viso rs ove r to the
side windows if things such as pens, ga­
rage door openers, hands-free speake rs,
etc. are a ttached to the sun visors. They
cou ld come loose and cause se rious in­
jury if the side c urtain airbag inflates .
- A deploying air bag infla tes in a fr action
of a second and with great force.
- Never a tta ch objects to the cover or in
the deploymen t zone of a side curtain
airbag .
- T he ai rbag dep loymen t zones m ust be
kept clear a t all t imes . Make sure t here
are no objects, pets, or other persons in
the space between any vehicle occupant and any airbag at any time.
- Do not attach any accessories to the
doors .
A WARNING
-The airbag system can deploy only once .
If the airbag has been triggered, the sys­
tem must be replaced by an author ized
Audi dealer or qualified workshop.
- Always have work involving the side cur­
tain airbag system, removal and installa­
tion of the a irbag components, o r other
repa irs perfo rme d by a qualified dealer­
ship. Othe rwise the airbag system may
not wo rk cor re ctly .
- Never attempt to modify any compo­
nents of the airbag system i n any way.

182 Audi pre sense
Audi pre sense
Preventative passenger
protection
Applies to vehicles: with Audi pre sense
Audi pre sense can initiate steps to help pro­
tect vehicle occupants in certain situations.
The functions described depend on equ ipment
installed in your vehicle:
Audi pre sense basic*
The following functions can be triggered in
certain driving situations:
- Tightening of the safety belts (for example,
during heavy braking): the front safety belts
have reversible belt pretensioners. If a colli­
sion does not occur, the safety belts loosen
slightly and are ready to be tightened again.
- Closing the windows and the sunroof* : the
windows and the sunroof* close leaving a
small open gap .
Audi pre sense basic functions can be trig­
gered at speeds above 20 mph (30 km/h).
Vehicles with Aud i drive select*: the deploy­
ment time is adapted in dynamic mode.
Audi pre sense front (vehicles with
adaptive cruise control*)
Audi pre sense front includes the functions in
Audi pre sense basic. In addition, within the limits of the system, the likelihood of a colli ­
sion with the vehicle immediately ahead is al­
so calculated . If the system senses an immi­
nent collision the follow ing functions can be
tr iggered:
- Audi braking guard
c::> page 85
- Tightening the safety be lts
- Closing the windows and the sunroof* (leav-
ing a small open gap)
Audi pre sense rear (vehicles with Audi
side assist*)
Audi pre sense rear includes the functions in
Audi pre sense basic. In addition, the likeli­
hood of a rear-end collision with the vehicle
coming from behind is also calcu lated. If the risk
of a co llision is detected, the following
functions can be triggered:
- Tig htening the safety belts
- Closing the windows and the sunroof* (leav-
ing a small open gap)
Audi pre sense plus*
Audi pre sense plus includes the functions in
Audi pre sense front and Audi pre sense rear .
Error message
Audi pre sense: not available
Preventative passenger protection is not avail­
able. See your authorized Audi dealer immedi­
ately to have the malfunction corrected.
_& WARNING
-=
Audi pre sense cannot overcome the laws
of physics. It cannot prevent a collision. Do
not let the increased safety provided
tempt you to take risks . This will increase
the risk of a coll is ion and serious personal
in juries .
- The sensors cannot always detect all ob­ jects. This increases the risk of a colli­
sion.
-Aud i pre sense does not detect people or
an im als or objects that are crossing the
veh icle's path
c::> page 79.
-The radar sensor's vis ion can be reduced
by heavy rain, ice, snow, heavy road sp ray
and reflections from gua rd rails, tunnel
entrances, etc. These and similar condi­
tions can prevent vehicles from being ac­
curately detected and in some cases they
may not be detected at all.
(D Note
The sensors can be displaced by impacts or
damage to the bumper, wheel housing and
underbody. This can affect the function of
the Audi pre sense system. Have your au­
thorized Audi dealer check to make sure
that the system is working properly.

With the engine turned off
If you listen to the radio, for example, with
the engine turned off or use other MMI func­
tions, the battery is being discharged .
If starting capability is jeopardized due to en­
ergy consumption, the following warning ap­
pears in the MMI display :
Please start the engine soon or the system
will be turned off.
The warning indicates that the system will be
turned off automatically after 3 minutes . If
you wish to continue using the functions , you
have to start the engine.
With the engine running
Although electrical energy is generated when
the vehicle is being driven , the battery can be ­
come discharged . This happens mostly when
little energy is being generated and a great
deal consumed and the battery's state of
charge is not optimal.
To bring the energy balance back into equili­ brium, consumers which require especially
large amounts of energy are temporarily cut
back or switched off . Heating systems in par­
ticular require a great deal of energy. If you
notice , for example , that the heated seats* or
the heated rear window are not heating, they
have been temporarily cut back or switched
off. These systems will be available again as
soon as the energy balance has been restored.
You will also notice that engine idle speed has
been increased slightly. This is normal and not
a cause for concern . By increasing engine idle
speed the additional energy required is gener­
ated and the battery is charged.
Intelligent technology 191
•
•

Automatic car wash
The vehicle can be washed in almost any
modern automatic car wash .
The vehicle paint is so durable that the vehicle
can normally be washed without problems in
an automatic car wash. However, the effect on
the paint depends to a large extent on the de­
sig n of the fac ility, the filte ring of the wash
water, the type of wash and care mater ial , etc.
If the paint has a dull appearance afte r go ing
through the car wash or is scratched, bring
this to the attention of the operator immedi­
ately. If necessary, use a different car wash.
Before going through a ca r wash, be s ure to
take the usual precautions such as closing the
windows and power roof. Factory installed an­
tennas must not be removed.
If you have installed additional accessories on
the vehicle -such as spoilers, roof rack, etc. -
it is best to ask the car was h operator if these
should be removed .
A WARNING
Always read and heed a ll WARNINGS and
other information
¢ page 200.
(D Note
- Fo ld the exterior mirro rs -flat there is a
r isk of damaging the exterio r mirrors .
Power folding exterior mirrors must not
be fo lded in or out by hand. Use the pow­
er function!
- Compare the track of your vehicle w ith
the d istance between the guide ra ils of
the facility- there is a risk of damage to
the wheels and tires .
- Compare the width of your vehicle wit h
the width of the tu nnel at the fac ility .
Cleaning and protec tion 20 1
Washing the vehicle by hand
A lot of water is needed when washing a vehi­
cle by hand .
.,. Before you start washing, make sure you
have read and u nderstood the WARNINGS
¢ .&. in General information on page 200 .
.,. First soak all dried d irt unt il it is soft, then
r inse it off.
.,. As you clean your vehicle , start w it h the
roof and wor k your way down to the bottom,
using a sponge, a sponge g love or a clean
brush.
.,. Rinse the sponge or the sponge g love often,
flushing it clean each time.
.,. Use specia l car shampoo only for
very per­
sistent d irt .
.,. Rinse the car thoroughly with water .
.,. Use a chamo is leather to gent ly w ipe the ex-
ter ior d ry.
Use a separate sponge for cleaning the
whee ls, door sills and other regions exposed
to road dirt . In this way, you w ill not scratch
the pa int w it h coarse par ticles imbedded in
the sponge the next time you wash the ca r.
& WARNING ~ -
- Do not clean the underside of the chas­
sis, fenders, wheel covers , or other ha rd
to reach parts witho ut protecting yo ur
hands and arms . You may cut yourself on
sharp-edged metal parts.
- Always read and heed a ll WARNINGS and
other information
¢ page 200.
(D Note
- Never try to remove dirt, mud or dust if
the su rface of the ve hicle is dry . Never
use a dry cloth or sponge, s ince this
cou ld scratch your vehicle's paint or win ­
dows.
- Never wash your car in bright s unlight.
Drops of water act as magn ifying lenses
and may damage your paint .
- When you wash your car in the winter: if you rinse your vehicle with a hose, be careful not to aim the stream of water •
•

204 Cleaning and protec tio n
8_ WARNING
Always read and heed all WARNINGS and
other information
r:=:> page 200 .
Aluminum trim
Use only neu tra l- pH products to remove spots
and depos its from alum inum surfaces .
C hr ome care products and alkaline cleaners
will attack alum inum surfaces and can dam ­
age them over time.
WARNING
Always read and heed a ll WARNINGS and
other information
r:=:> page 200 .
Touch-up paint
Minor paint damages should be touched up
immediately.
• Use either a touch-up pa int stick or spray
paint to cover minor scratches and nicks .
Your Audi dealer has touch-up paint for minor
scratches and stone chips . Scratches shou ld
be touched up soon after they occu r to pre­
vent corrosion .
If a spot starts to rust, however, a simple
touch-up job w ill not be enough. The affected
surface must be sanded smooth and coated
with a n anti-rust pr imer before the pa inted
f inish can be restored.
The number for the origina l vehicle paint can
be found on the vehicle ident ification labe l
<=:>page 270.
8_ WARNING
Always read and heed a ll WARNINGS and
other information
r:=:> page 200 .
Windows
Clear vision to all sides.
Clean all windows regularly to remove road
film and ca r wash wax bu ildup. •
Remove snow from windows using a brush.
• Use a p lastic ice scraper to remove ice from
w indows and mirrors.
• Remove other residue on the windows with
a spray-on glass cleaner.
• Wipe the windows dry with a clean piece of
cloth or kitc hen paper towel.
The best way to remove snow from windows and mirrors is to use a brush. Use a non-abra­
s ive
pla stic ic e scraper -better still, a spray
deicer - to remove
ice from w indows and mir­
ro rs.
Oil, grease or s ilicone residue can be removed
with
gla ss clea ner or s ilicon e re m over . How ­
ever, wax res idue requires the use of a spec ial­
ly formulated so lvent. Please contact your Au­
di dealer for advice on safe products for wax
remova l.
Windows should also be cleaned on the inside at regu la r i nte rvals .
Never dry windows with the same chamo is
that you use to dry painted surfaces. Wax resi ­
due on the chamois can impair v is ion through
the windows .
8_ WARNING
- Always read and heed al l WARNINGS and
o ther info rmation
r:=:> page 200.
- The windsh ield must not be treated w ith
water-repellent materials. They can in­
crease glare under poo r visibility condi­
tions such as wetness, darkness, or when
the sun is low on the horizon . In addi­
tion, they can cause the windshield wip­
ers to chatter.
(D Note
- Never use warm or hot water to remove snow and ice from windows and mirro rs .
Th is could cause the glass to crack.
- To prevent damage to t he wires of the
rear defogger, do not place any adhesive
st ickers on the ins ide of the rear window
over the wires.
...

-To he lp prevent d irt from scratching the
window, always scrape in a forward di­ rection -pushing the scraper away from
you -never back and forth.
Cast (light) alloy wheels
Cast (light) alloy wheels require special care.
.,. Wash the whee ls with a sponge o r hose
brush every other week.
.. For deep cleaning afterwards, use only a
dedicated
a ci d-fr ee cast alloy wheel cleaner .
.,. Rub a coat of
liquid w ax onto the r ims every
three month. Be sure to reach and treat all parts of the rim .
To preserve the decorative appearance of the
cast alloy wheels, some special care is neces­
sary . In add it ion to road dirt and salt, brake
dust is also corros ive. If left on for too long,
brake dust ca n cause pitting .
Use only special
acid-free cleaners formulated
for alloy rims . Safe products are available at
your Aud i dealer. Never leave the cleaner on
the r ims longer than spec ified on the label. If
not rinsed off p romptly, the acid co nta ined in
some cleane rs can attac k the th reads on the
wheel bo lts.
Never use abras ive or metal polishing clean­
i n g agents. If the protective coat ing has been
chipped, e.g. by k icked up road dirt, touch it
up as soon as possib le.
A WARNING
- Moist ure and ice on brakes may affect
braking efficiency~
page 187, General
information .
Test the brakes caref ully
each time you wash the vehicle.
- Always read and heed all WARNINGS and
other information
c:> page 200.
-
Cleaning and protec tion 205
Body cavity sealing
The body cavity sealing does not need to be
checked .
All body cav ities which could be affected by
corros io n have been thoroughly protected at
the factory .
This sealing does not require any inspection or additional treatment. If any wax should seep
out of the cavity when the ambie nt tempera­
ture is high, it can be removed with a plastic
scraper and a su itable solvent .
A WARNING
Solvents can be dangero us.
- Benz ine is flammab le and toxic. If you
use benz ine fo r removing the wax, keep
sparks, flame and lighted cigarettes
away. Never dump ben zine on the
groun d, into open streams or down sew­
age drains .
- Be s ure to obse rve all safe ty and environ­
men tal reg ulations. Fo llow all instruc­
tions on the container.
- Always read and heed all WAR NINGS and
o ther information
c:> page 200.
Chassis
Have the undercoating checked for damage
from time to time.
The lower body shell of your Aud i is also thor­
oughly p rotec ted against cor ros io n.
Any damage to the undercoat ing caused by
road hazards should be repaired promptly .
A WARNING
Too much undercoating in the wrong pla­
ces can cause a fire.
- Do not apply additional undercoating or
rustp roofing on or nea r the exhaust
manifold, exhaust pipes, catalyti c con­
ver ter or heat shields. While driving, the
substance used fo r undercoating could
overheat and cause a fire.
•
•

Have the battery checked when you take your
vehicle in for service. Yo u are well advised to
replace a battery that is older than 5 years.
W ith certa in types o f airbag deployment, the
battery is disconnec ted from the vehicle elec ­
trica l system for safety reasons
c::> &. in Re­
pair, care and disposal of the airbags on
page 153.
Di sconn ecting the battery t erminal s
Some vehicle functions (power w indow regu­
l ators, for example) are lost if the battery ter­
minals are disconnected . These functions have
to be re learned after the battery terminals are
connec ted again. To prevent this, the battery
should only be disconnected from the vehicle
e lectrical system when absolutely necessary
for repairs .
Vehicl es not driven for long p eriod s
If you do not drive your vehicle over a period
of several days or weeks, electrical compo­
nents are gradually cu t back or switched off .
This reduces energy consumption and main ­
tains starting capability over a longer per iod
c::> page 190. Some of the convenience func­
tions may not operate, s uch as the inte rior
lights o r power seat adjus tme nt. The conven­
ience functions will be ava ilable again when
you switch on the ignition and start the en­ gine.
Winter operation
During the winter months, ba ttery capaci ty
t ends to decrease as tempe rat ures d rop . This
is because more powe r is also consumed while
starting , and the headlights, rear window de ­
fogger, etc., are used more often.
Avoid unnecessary power cons umption, par­
ticularly in c ity t ra ff ic or when t raveling on ly
short distances. Let your a uthorized Audi
dealer check the capac ity of the vehicle bat ­
tery before winter sets in
c> page 229. A well
charged battery w ill not only prevent starting
problems whe n the weather is cold, but will
also last longer .
Checkin g and fillin g 22 7
(D Tips
If your vehicle is left standing for seve ral
weeks at extremely low temperatures, the
vehicle battery shou ld be removed and
stored where it w ill not freeze. This will
prevent it from be ing damaged and having
to be replaced .
Working on the battery
Be especially careful when working on or near
the battery.
The battery is located in the l uggage compart­
ment under the floor. Before you check any­
th ing in the luggage compartment,
read and
h eed all WARNINGS
c> &_ .
Always heed the safety warnings , when work­
ing on the vehicle battery or the vehicle e lec­
trical system to prevent injury.
The following WARNINGS are very
important when working on the battery:
Al way s heed the follo wing WARNING SYM­
BOLS and safety precautions when working on the battery.
@
®
Always wear eye protection.
Battery acid contains sulfuric acid.
Always w ear glove s and eye prot ec­
tion .
No
- sparks
-flames
- smoking .
When a battery i s charged, it produ­
ce s hydrogen gas wh ich i s ex plosive
and could cause per sonal injury .
Always keep the battery well out of ]
reach of children .
_& WARNING ~
Whenever working on the battery o r on
the electrical system, there is the risk of injury, accident and even fire . Read and
heed the following WARNINGS:
•
•

228 Check ing and filling
- Always wear eye protection. Do not let
battery acid or any lead particles get on
your sk in or cloth ing . Sh ield your eyes .
Explosive gases can cause blindness or
other injury .
- Battery acid contains sulfur ic acid . Sulfu­
ric acid can cause blindness and severe
burns .
- Always wear gloves and eye protection.
Do not t ilt the battery because acid
could leak out of the venti lation open­
ings.
- If you get battery acid in yo ur eyes or
on your skin, immediately rinse with
cold water for severa l m inutes and get
medical attention .
- If you should ingest any battery acid,
seek medical attention immediately.
- Do not expose the battery to an open
flame, electric sparks or an open light.
- Do not smoke.
- Do not interchange the posi tive and neg -
ative cab les.
= When wo rking on the battery , be sure
not to short -circuit the termina ls with
tools or other metal objects . This would
cause the battery to heat up very quickly,
which could lead to damage or explosion
and personal injury.
- When a battery is charged, it produces hydrogen gas which is explosive and
cou ld cause personal injury .
- Always keep the battery well out of the
reach of chi ldren .
- Before work is done on the e lectrica l sys­
tem, disconnect the negative ground ca­ ble .
- Before perform ing any work on the elec­
trical system, sw itch
off the engine and
ignition as well as any electrical equip ­
ment . The negative cable on the batte ry
must be disconnected . If you are just go­
ing to rep lace a light bu lb, then it is
enough to sw itch
off the ligh ts.
- Before disconnect ing the battery, switc h
off the anti-theft alarm sys tem! Othe r­
wise you will set off the alarm. -
When disconnecting the battery, first
disconnect the negat ive cab le and then
the posit ive cab le.
- Before reconnecting the battery, make
sure all e lectr ical consumers are sw itch­
ed off. Reconnect the pos it ive cable first
and then the negative cable . Never inter ­
cha nge the cables - this could start a fi re!
- Never charge a frozen or a thawed-out
battery .
It could explode! If a battery has
frozen , then it must be replaced . A dis­
charged batte ry can free ze over at 32 °F
(0 °C) .
-Make sure the vent hose is a lways attach­
ed to the opening on the s ide of the ba t­
tery .
- Never use batteries which a re damaged.
There is the danger of an explosion! Al­
ways rep lace a damaged b attery.
A WARNING
Ca lifornia Proposi tion 6S Warning:
- Battery posts, te rminals and related ac­
cesso ries cont ain lead and lead com­
pounds, chemica ls known to the Sta te of
California to cause cancer and reproduc­
tive problems. Wash hands after han­
dling.
(D Note
- Do not disconnect the vehicle battery
when the ignit ion is on or when the en­
gine is run ning, otherwise , you will dam­
age electronic components in the electr i­
cal system.
- If your vehicle is going to stand for a
long period of time without be ing driven,
protect the battery from "freezing", oth­
erw ise it will be damaged and will then
have to be replaced .
- When open ing the doors, the windows
lower approximately 10 mm automati ­
cally. This function is not ava ilable when
the battery is disconnected, which
means there is a risk that the door sea l
o r the window could be damaged.