sensor AUDI Q7 2013 Owner´s Manual

Instrument s and warning /indicator lights 13
Switching on the clock and odometer
W ith the ignition turned off, the o dometer
reading and the digital clo ck w it h date display
can be sw itched on for abo ut 30 seconds by
pressing the
I CH ECK i button ¢ fig. 6 .
Starting the Auto-Check sequence
The Auto-Check system ¢ page 30 constan t­
l y m oni tors ce rtai n in dividual f unct io ns and
components o f the vehicle when the ignition
is t urned on and w hen the veh icle is moving.
W ith the igni tion tu rned on , you can st art the
"Au to-C hec k seque nce" by pre ssing the
ICHECK I button. You can pe rform an A uto ­
Check sequence when the ve hicle is stationary
and the ign ition is turned on or when the vehi­
cle is moving not faster than
3 mph (5 km/h).
The numbe r of keys programmed to the veh i­
cle is a lso d isplayed. The d isp lay
3 \3 indicates
that three keys have be en programmed . This
allows yo u to make sure you have rece ived a ll
of the keys when you purchase a used vehicle.
F or exam ple, if you on ly receive two keys, you
should take those keys to your authorized
Audi dealer to have the missing key deactivat­
ed so it cannot be used. You sho uld also re­
port the m issi ng key to you r insurance compa­
ny .
Call ing up the driver information
A yellow or red symbol appears in the instru­
ment cluster display, usually w ith a dr iver
message . The driver message display disap­
pears after about 5 seconds . The driver mes ­
sage can be displayed aga in by briefly press­
ing the
! CHECK I button .
Setting the speed warning
By pressing the I CH ECK i button briefly, yo u
can set thres hold 1 of the speed warning whi
le you a re drivi ng
¢ page 29. By main ­
ta ining pressure on the
I CH ECK i button, you
delete the wa rn ing thres ho ld .
Instrument cluster illumination
The basic brightness of the illumination for
the instruments, the center console and the
display can be adjusted.
Fi g. 7 Instru me nt cluste r illu min atio n
~ Press the"+" but ton to inc rease the bright ­
ness dur ing the hours of dar kness .
~ Press t he"- " butto n to de crease the b right-
ness dur ing the hours of dar kness.
A lig ht sensor in the instrument cl uster con­
tro ls the illum inat ion fo r the instrument clu s­
t e r, the cen ter conso le a nd t he displays. I n a
br ig ht env iron ment, using t he bu tt ons to
change the brig htness h as no effe ct .
(D Tips
T he ill umin ation for the ins trument cl uste r
light s up w he never y ou swi tch on the igni­
tion with the vehicle headlights off. As the
d aylight fa des , the inst rument cluster illu­
mination likewise dims automat ica lly and
will go out completely when the o utside
li g ht is very l ow . This feature is meant to
r emi nd you to switch o n the head lig hts
whe n outs ide light conditions become
p oor .

34 Driver information display
Do not drive vehicle: steering defective
• Contact you r nearest authorized Audi dea le r
or qualified workshop.
• Do
not tow yo ur vehicle .
.&, WARNING
-
Your vehicle must not be towed in the
event of a malfunction in the electronic
steering column lock because it cannot be
steered due to the locked steering. If it is
towed w ith the steering locked, there is
the risk of an accident .
~ Ignition lock malfunction
A malfunction in the ignition lock must be re­
paired immediately.
If the . symbo l in the display blinks, there is
a ma lfunction in the electronic ignition lock.
An addit ional driver message ca n also be d is­
played by pressing the
! CHECK I button:
Ignition lock defective. Contact workshop !
• Do not turn the eng ine off.
• Drive immediately to an authorized Audi
dealer to have the ma lf u nction corrected.
If there is a ma lfunction in the e lectronic igni ­
tion lock, the ignition cannot be turned off.
Drive immediately to an authorized Audi dea l­
er to have the cause of the ma lfunction cor­
rected.
On vehicles with Convenience key*, the engine
should not be switched off using the
! STOP !
button beca use the engine ca nnot be sta rted
again after the ignition is switched off.
' Yellow symbols
A yellow symbol means WARNING.
Fig . 26 Display: low fuel level warning (priority 2)
Yellow symbo ls indicate a priority 2 malfunc­
t ion -Warning!
When a yellow war ning symbol appears,
one
warning tone sounds . A driver message ap­
pears as well to exp lain the malfunction in
more de tail. The driver warning goes out after
about 5 seconds, but it can be brought up
again at any time by pressing the
! CHECK I but­
ton .
Check the displayed function as soon as possi­
ble. If more than one priority 2 ma lf u nction is
detected, all symbols will appear one after
the other for about 2 seconds .
Yellow symbols mean:
II
Convenience key"
Key not in vehicle
c> page 108
•
USA models: Defective
brake light
c>pa ge23
[IJ
Canada models: Defective
brake light
c> page 23
1:1
Defective light bulb
c>page 23
.
m
Light/rain sensor defective
c>pag e 35
~
Windshield washer fluid lev-
el low
1 .. c>page35

II
AdBlue ,/'
II
•
•
•
m
m
-
[I]
Low fuel level
¢page 35
Refill Ad Blue*
¢page261
AdBlue malfunction*
¢poge261
Battery voltage
¢page36
Worn brake pads ¢page36
Dynamic headlight range
control defective
¢page36
Check engine oil level
¢poge36
Engine oil sensor malfunc­
tion ¢poge36
Engine speed limitation*
¢page36
Diesel particulate filter*
clogged
¢poge37
Adaptive light* defective
¢poge37
Ignition lock malfunction
¢poge37
Windshield wiper defective
¢poge37
-Tire pressure monitoring
system
Loss of air pressure
¢poge299
Tire pressure monitoring
system
System not available
¢poge299
Driver information display 35
Battery in remote control
key
¢page39
Automatic transmission
malfunction
¢ page 141
...?c, Key not in vehicle
Applies to vehicles: with Convenience key
I!! Key not in vehicle
This reminder appears along with the I!! sym­
bol if the master key is removed from the
ve­
hicle with the engine running. It is intended
to remind you (e.g . when chang ing drivers)
not to continue the journey without the mas­
ter key.
If the master key is no longer in the vehicle,
you cannot switch off the ignit ion after stop­
ping the engine and you also cannot start the
engine again. What is more, you cannot lock
the vehicle from the outside.
@. D Light/rain sensor defective
E;I Automatic headlights/ automatic wipers
defective
If the symbol illuminates, the light sensor has
failed. For safety reasons the low beams are
turned on permanently with the switch in
AU­
TO. However, you can continue to turn the
lights on and off using the light switch. In the
case of a defect in the rain sensor, the wind ­
shield wiper lever functions are still available.
Have the light/rain sensor checked as soon as
possible by an authorized Audi dealer .
c)3 Windshield washer fluid level too low
~ Please refill washer fluid
If the symbol illumina tes, add windshield
washer fluid to the washer system and also to
the headlight washer system
¢ page 2 79.
Eli) Fuel supply too low
II) Please refuel

36 Driver in formation d isplay
When this symbo l Ii] il luminates for the first
time, the fuel reserve in your vehicle is sti ll
between
2 .6 and 3 .2 gallons (10- 12 liters) .
Refue l as soon as possib le
¢ page 258.
If the symbol lights up, even when there is
ample fuel in the tank, and the text
T a nk sys ­
tem malfunction! Cont act wor kshop
appears
in the display, there is a fault in the system.
Contact a qualified workshop to have the fau lt
rectified .
t::l Battery voltage
If the battery's state of charge is not in the
optimal range , the (•) symbo l is shown in the
d isp lay and the dr iver message
Low battery
c harge : battery will be charged while driving
appears.
W hil e this dr iver not ificat io n is displayed, you
have to be p repared for lim ited start ing capa­
b ili ty.
Driver m essage appears and goes out
again
I f t his driver message appea rs after the igni ­
tion is turned o n or wh ile driving and it goes
out again after a while, the battery has been
adequately recharged .
Driver message appears and does not go
out again
If th is driver notification appe ars after the ig ­
nition is turned on or while driving and does
not go out again, the battery 's state of charge
is not in the opt imal range. Starting capability
is restricted. Have the battery checked by an
authorized Audi dealer as soo n as poss ible.
{0 : Worn brake pads
llJ Brake pads!
If the warn ing light illum inates, immediately
contact your authorized Audi dealer or quali­
fied workshop to have all brake pads inspect ­
ed . On USA models the wa rning lig ht
llJ
l ) - : USA mod els only
comes on together with the warning light
1111 . Both sets of brake pads on an ax le
must a lways be rep laced at the same time.
A WARNING
=
Driving w it h bad brakes can cause a colli-
sion and ser ious personal in jury.
- I f the warn ing light
llJ and the warning
light
11111 ' with the message Brake
pads!
comes o n in the inst rument cluste r
d isp lay, immediately contact your au­
thor ized A udi dealer or qualified wo rk­
shop to have all b rake pads checked or
re placed if ne cessa ry.
~(i) Headlight range control
fl Headlight rang e control defe ctive !
-
If the symbol illuminates, th e dynamic head­
li ght rang e control is no longer work ing prop­
erly. Have the system checked and repa ired at
yo ur authorized Aud i dea le r.
~ -Engine oil level
Ill Please check oil level
When the symbol illum inates, check the en­
gine o il level a s soon as possible ¢
page 269.
Top off t he oil at your ear liest opportu nity
¢ page 270 .
't::r.~ Engine oil sensor defective
Ill Oil le vel ! Sensor defect ive
If t he symbol illum ina tes, contact yo ur au ­
thorized Aud i dea le r and have the oil sensor
inspected. Unti l yo u have this done, check t he
oi l level each time you refue l just to be on the
safe s ide
¢ page 269.
! ?')
Engine speed limitation
Applies to vehicles: wit h engine speed limitatio n
(m Do not e xceed ma x. engine speed of
XXXX rpm

42 Openin g and clo sing
readiness light, located in the upper part of
the driver's door panel, will start to blink.
- T he vehicle interior lights turn off.
Unlocking and l ocking with Conven ience
k ey*
On vehicles which a re equipped w ith the C o n­
ve nience k ey*
authorization system, the
doors are unlocked without a key by means of
a proximity sensor in the door handle. The
doors are simi larly locked without a key using
the locking button. Each door has a proximity
sensor and a locking button .
Automatic l ock ing
The automatic locking feature locks all the ve­
hicle doors and the rear lid when you drive
faster than 9 mph (15 km/h). This function can be turned on and off in the MMI
C entr al
lo cking
Menu c:> page 44.
You can un lock the vehicle from the inside by :
- removing the key from the ign it ion sw itch
(the vehicle will automat ica lly unlock itself)
or
- pressing the unlock part of the power lock
switch @or
- pull ing the door handle (twice to open the
rear doors).
Unintent ionall y locking yourself out
In the following cases there safeguards to
prevent you locking your remote master key in
the vehicle :
- The veh icle does not lock with the power
locking sw itch
c:> page 44 if the driver's
door is open.
- On vehicles with Convenience key* , if the
most recently used master key is in the lug­
gage compartment, the rear lid is automati­
cal ly unloc ked aga in after it is closed.
Do not lock your vehicle with the
r e mot e m as ­
t e r k ey or Convenienc e key*
until all doors
and the rea r lid are closed. In t his way you
avoid locking yourse lf out accidenta lly.
A WARNING
- When you lock your vehicle from outside,
nobody- espec ially children -should re ­
main inside the vehicle . Remember,
when you lock the vehicle from the out­
side the windows cannot be opened from
the inside.
- When you leave the veh icle, always re­
move the ignition key and take it with
you . This will prevent passengers (chil­
dren, for example) from accidentally be ­
ing locked in the vehicle should they acci­
dentally press the power locking switch
in the front doors.
- Do not leave children inside the vehicle
unsupervised. In an emergency it would
be imposs ible to open the doors from
the outside without the key.
(D Tips
- In the event of a crash with airbag de­
ployment all locked doors will be auto­
matically unlocked to give access to the
vehicle occupants from the outside.
- If the power locking system sho uld mal­
function, you can lock each door individ­
ually using the vehicle key
c:> page 45 .
-If the power locking system shou ld fa il,
you can still open the fuel tank flap in an
emergency
c:> page 261 .
-You are well advised not to keep va lua­
bles inside an unattended vehicle, v is ible
or not. Even a properly locked vehicle
cannot p rov ide the secur ity of a safe .

50 Openin g and clo sing
When a door is unlocked, the driver 's door is
a lways unlocked as we ll.
It depends on the
settings in the central locking menu in the
MMI whether the entire vehicle is unlocked or
only certain doors ¢
page 44.
{O) Tips
If your vehicle has been stand ing for an ex­
tended period, please note the following:
- The proximity sensors are deactivated af-
ter a few days to save power. You then
have to pull on the door handle once to
unlock the vehicle and a second time to
open the veh icle.
- To prevent the battery from being dis­
charged and to preserve your veh icle's
ability to start for as long as possible,
the energy management system gradu­
a lly switches off unnecessary co nven­
i ence f unct io ns.
It is possible that you
will not be able to unlock your vehicle us­
ing these convenience f unctions.
Locking the vehicle
Applies to vehicles: with Conve nience key
The vehicle can be locked without operating
the master key.
Fig . 45 Conve nience key: Lock ing th e ve hicle
.. Move the selector lever to the P position.
.. Press the locking button in the door handle
to lock the vehicle¢,&.. Do not reach inside
the door handle .
The vehicle can be locked at any door. The au­
thor ized master key on ly has to be within a
range of about 5 feet (1.5 meters) from the
pa rticular door . T
he selec tor lever must be in the P position,
otherwise the ve hicle cannot be locked .
A WARNING
--When you lock yo ur vehicle from o utside,
nobody - espec ia lly children - shou ld re­
main inside the vehicle. Remember,
when you lock the vehicle from the out­
side the wi ndows cannot be opened from
the inside.
- When you leave the veh icle, always re­
move the ign ition key and take it with
you. This will prevent passengers (chil­
d ren, fo r ex ample) from acci dentally be­
i n g lo cked in the vehicle shou ld they acci­
denta lly press the power locking switch
in the front doors.
- Do not leave ch ildren inside the vehicle
unsupervised. In an emergency it would
be impossible to open the doors from
the o utside witho ut the key.
(J} Tips
It i s no t possible to re -open the doo r fo r a
brief pe riod directly after closing it. This
allows you to ensure that the doo rs are
properly locked.
Anti-theft alarm system
The anti-theft alarm triggers an alarm if any­
one attempts to break into the vehicle.
The anti-theft alarm system triggers an audi­
ble ala rm and turns on the emergency flashe r
if an unautho rized interfe rence with the veh i­
cl e is sensed by the sys tem.
How is the anti-theft alarm system
switched on?
T he anti-theft alarm system is switched on
whe n you lock the ve hicle. The system is ac ti­
vated approximate ly 30 seconds after the ve­
hicle is locked. The indicato r ligh t on top o f
the door trim start flashing rapid ly for 30 sec -
onds and then blink slowly. ..,.

Clear vision Lights
Switching the headlights on and off
In the "AUTO" position, a light sensor auto·
matically switch es t he head· and taillights on
and off in r espons e to light conditions .
Fig. 53 Instrument pane l: lig ht sw itch
The ligh t sw itch m ust not be overturned pas t
the stops in
eit her direct ion .
Sw itching on automatic headlight control
,.. Turn the light switch to AUTO ¢ fig . 53 .
Swi tching on the side m ark e r lights
,.. Turn the light switch to :;oo:;.
Sw itching on the headlights and high
be am
,.. Turn the light switch to io .
,.. Push the high beam lever forward towards
the instrument panel
9 page 60 .
Switching off the light s
,.. Turn the light switch to 0.
The headlights only wo rk when the ignition is
sw itched on. While s tart ing the engine or
when switching
off the ignition, the head ·
lights will go
off and on ly the s ide marker
lights will be on .
Afte r star ting t he engine, the headlights are
automatically adjusted* to the load and angle
of the vehicle (for example, during accelera ·
tion, braking). This prevents oncoming traffic
from experiencing unnecessary headlight glare from your headlights.
Clear vi sion 5 7
If the system is not ope rat ing properly, a
warning symbol in the Auto-Check Control is displayed ¢
page 36.
With the side ma rker ligh ts or he ad ligh ts
switched on, the symbol next to the light
switch i lluminates
:oo :.
Daytime running lights
- USA model s:
The daytime runn ing lights
w il l come on automatically whe n the igni­
tion is t urne d on and the l ight sw itch
¢
fig. 53 is in the O position or the AUTO po ­
sition (only in daylight conditions). The
Day­
time running lights
function can be turned
on and
off in the MMI menu E xter ior l ight ·
ing
¢ page 58.
- Canada models: The dayt ime running lights
w ill come on automatically when the igni·
tion is turned on and the light switch
¢
fig. 53 is in the O position o r the AUTO po ·
sition (only in daylight condit ions) ¢ .&. .
Automatic headlight control
In the switch position AUTO the automatic
headlight control
i s turned on. The low
beams and tail lights are turned on automati·
ca lly through a light sensor as soon as amb i­
ent b rightness (e.g . when driving into a t un­
nel) fa lls below a value p reset a t the factory.
When ambien t brightn ess increases ag ain ,
the low beams are turned
off ag ain automati­
ca lly ¢ .&. .
In the
AUTO posi tion the low beams a re
swi tched
off au tom ati cally when the igni tion
is tur ned
off.
Light Sensor Malfunction
In the event of a light sensor malfunction, the
dr ive r is notified in the instrument cluster dis­
play:
g Automatic h eadlights / automatic w ipers
defective
For safety reasons the low beams are t urned
o n permanently with the switch in
AUTO .
However, you can conti nue to turn the lights
o n and
off using the light switch . Hav e the II>

58 Clear vis ion
li g ht sensor checked as soo n as poss ible at an
author ized Audi dealer or qua lified wor kshop .
.&_ WARNING
-Daytime ru nning lights and automatic
headlights are only intended to assist
the driver. They do not relieve the driver
of his respons ib ility to check the head­
lights and to turn them on manually ac­
co rding to the current light and v is ibi lity
condit ions. For example, fog cannot be
dete cted by the light sensors*. So alw ays
switch on the headlights
io u nder these
weather conditions and when driving in
the dark.
- Crashes can happen when yo u cannot see
the road ahead and when you cannot be seen by other motorists. Always turn on
the headlights so that you can see ahead
and so that others can see yo ur car from
the back.
- Please obey a ll laws when using the
lighting systems described here.
@ Tips
- With the switch in AUTO front fog lights
and rear fog lights cannot be turned on in addition.
- The light senso r for headlight contro l is
l ocated in the rear view m irror mount.
You should therefore not app ly any st ick­
ers to the windsh ield in this area in o rder
to preve nt ma lfunctions o r failures.
- Some exterior lighting functions can be
adjusted
c:> page 58.
-When you remove your key from the igni­
tion while the vehicle's lights are turned
on, a buzzer sou nds as long as the driv­
er's door is open .
- In coo l o r damp weather, t he ins ide of
t h e headlights, turn signa ls and tail
li ghts can fog ove r du e to t he tempera­
tu re diffe re n ce between the inside and
outside. They will cle ar sho rtly after
swi tching them on. This does not affect
t h e service li fe of the lighting . -
In the event o f a light sensor malfunc­
tion, the driver is notified in the instru­
ment cl uster display
c:> page 35 .
Adjusting exterior lighting
The functions are set in the MMI.
• Select: I CAR I func tion button > Systems *
cont ro l but to n > Exterior lighting . Or
.. Select:
!CAR ! function b utton> Car sys­
tem s* contro l button > Vehicle setting s >
Exterior lighting.
Coming home (Lights when leaving car ),
Leaving home (Lights when unlock ing car )
T he coming home f unction ill umi nates the
area o utside the vehicle when you tu rn the ig­
nition off and open t he driver's door. Depend­
ing on vehicle eq uipment, the f unction can be
switched on and off or the length of t ime the
lights remain on* can be adjusted .
The leaving home illum inates the area outside
the vehicle when you unlock the vehicle. This
funct ion can be switched on and off .
The Coming home and Leaving home func­
tions only operate when it is dark and the light switch is in the AUTO position.
Daytime running lights
USA models: The daytime r unning lights can
be turned on or off using th is function.
Canad a model s: Th e fu nction ca n no t be
tu rned off .
It is activated automati cally each
time the ignition is t urned on. This menu item
is shown "greyed out" .
Front fog lights
Fig . 54 Instrument pa nel: light switch

Sun shade
App lies to vehicles: with s un shade
The windows in the rear doors and the rear
window ore each equipped with a sun shade.
Fi g. 63 Sun shade pulled up on a rea r window
Fig . 6 4 Sun shade pulled up on the rear lid window
Sun shade (rear doors )
~ Pull the shade out and hang it in the brack­
et on the upper door frame
c::> fig. 63.
Sun sh ade (rear window )
~ Pull the shade out and hang it in the brack­
et on the rear lid frame
c::> fig. 64.
Clear vi sion 63
Wiper and washer
system
Switching the windshield wipers on
The windshield wiper lever controls both the
windshield wipers and the washer system.
F ig . 65 W indsh ield wiper leve r
The windshield wiper lever c::> fig. 65 has the
follow ing pos itions:
Activating rain sensor
~ Move the lever up to pos ition (D .
~ Move switch @up or down to ad just the
sensitivity of the rain sensor.
Low wiper speed
~ Move the lever up to pos ition @.
High w ipe r speed
~ Move the lever up to pos ition @.
One-touch wiping
~ Move the lever to position @, whe n you
want to wipe the windshield
briefly .
Automatic wiper /washer
~ Pull the lever to position ® (toward the
s t eer ing whee l) and hold.
~ Release the lever . The washer stops and the
w ipers keep go ing for about four seconds .
Depending on how long the lever is held,
different numbers of wash cycles are per­
formed.
Turning off the wipe rs
~ Move the lever back to position @ .

64 Clear vis ion
General information
The winds hield wipers and the w indshield
washer system operate only with the ignition
on.
During a temporary stop , e.g . at a t raff ic sig­
na l, the set wipe speed is automatically re­
duced by one stage.
The winds hield washer no zzles a re heated at
l ow temperatures when the ignition is on .
Removing w ate r droplet s
About 5 seconds after the wash cycle is com­
plete, the wiper system performs a single au ­
tomatic wipe cycle to remove any water drop­
l ets that remain on the windshield whi le dr iv ­
ing.
If you would like to deactivate this delayed
wipe cycle wh ile driving, you have to pull the
l eve r to pos ition ® again within 10 seconds
after this wipe cy cle.
Water droplet removal is reactivated after the
ignit ion is switched off and then on again .
Winter position
To speed up de -icing of the w indshield w ipers,
t hey move to the winter posi tion when the ig­
n ition is switched off and at an outside tem­
perature below 39
°F (4 °(). In this posit ion ,
the w indshield wipers are in an area on the
g lass w hich is reached by the a ir vents below
the glass. It is also easier to remove snow and
ice from the wi ndshield wipers in this posi­
tion .
The wipe rs leave the w inte r position, when
the ign ition is swi tc h ed on, if the winds hield
wiper lever is operated or the active rain sen­
sor reacts to moistu re.
Rain sensor
The rain senso r operates on ly in the inte rva l
wiper position . When it sta rts to ra in , the in­
terval wipe r mode is activated automati ca lly.
If the windshie ld w iper lever is in the inte rval
wipe posit ion w ith the ign ition switched off, the ra
in sensor is not activated until ve hicle
sp eed is above 4 mph (6 km/h).
T o red uce the sensi tivi ty of the rain senso r,
the switch @ mus t be moved down . T o in­
crease the sensitivity of the rain sensor, the
switch must be moved up.
T he higher the sensit iv ity se tt ing , the sooner
the windshie ld wipers react to moist ure on
the windshie ld . I nc reased sensitivity is sig­
naled by the windshie ld wipers making a sin­
gle pass over the windshield.
T he rain sensor w iper intervals depend on the
sensitivity setting as well as vehicle speed.
D uring brief stops, wiper motio n will adj ust in
relat ion to the amount o f rain on the w ind­
shield .
A WARNING
-W iper blades are crucial for safe driving!
O nl y when they are i n good co ndit io n are
they able to clear the windows prope rly
to p rov ide uncompromised vis ib ility.
Wo rn o r damaged wipe r blades are a
safety ha zard
~ page 66, Replacing
windshield wiper blades!
- T he rain sen so r is only designed to assist
a nd suppor t the driver.
It rem ains enti re­
ly the d river 's responsibility to monitor
outside weathe r conditions and to man­
ually activate the wipe rs as soon as rain
or driz zle reduces visibility through the
windshie ld.
(D Note
In freezing or near freezing conditions:
- Always check that the w iper b lades are
not frozen to the g lass before you turn
the wipe rs on . Loosen a wiper blade
wh ich is frozen in place before operating
the wipers to prevent damage to the
w iper blade or the wiper motor.
- Do not use the w ipers to clear a frosted
w indow. Us ing the wipers as a conven­
ient ice scrape r will destroy the wiper
blades .