oil filter AUDI A6 2017 Owners Manual

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" N .... 0 0 <..:l ' Safety .. .. .. .... .. .... ... .. .. .... . 128
Driving safety . . . . . . . . . . . . . . . . . . . . 128
Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Correct passenger seating positions . . . . . 129
Driver 's and front passenger's footwell . . 133
Pedal area . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Sto ring cargo correctly . . . . . . . . . . . . . . . 134
Repo rting Safe ty Defects . . . . . . . . . . . . . . 13 5
Audi pre sense . . . . . . . . . . . . . . . . . . . 137
P reventative passenge r protect ion . . . . . . 137
Safety b elts . . . . . . . . . . . . . . . . . . . . . . 139
Ge ne ral informa tion . . . . . . . . . . . . . . . . . 139
Why use safety belts? . . . . . . . . . . . . . . . . 14 0
S afety belts . . . . . . . . . . . . . . . . . . . . . . . . 142
B el t tensione rs . . . . . . . . . . . . . . . . . . . . . . 14 5
Airbag system . . . . . . . . . . . . . . . . . . . . 147
I m portan t info rm ation . . . . . . . . . . . . . . . 147
F ront airbags ... .. .. .... .. . .. .. .. .. . 151
M on itor ing the Advanced Airbag System . 159
Knee airbags . . . . . . . . . . . . . . . . . . . . . . . . 163
Side airbags . . . . . . . . . . . . . . . . . . . . . . . . 165
Side curtain airbags . . . . . . . . . . . . . . . . . . 168
Ch ild safety . . . . . . . . . . . . . . . . . . . . . . 171
Important information . . . . . . . . . . . . . . . 171
Ch ild seats . .. ............... .. .. .. . 177
Secur ing ch ild seats . . . . . . . . . . . . . . . . . . 182
L ATCH system ( lower anchorages and
tethers for chi ldren) . . . . . . . . . . . . . . . . . 185
Addit io nal info rmat ion . . . . . . . . . . . . . . . 189
Maintenance and Care . . . . . . . . . . . 190
Checking and Filling . . . . . . . . . . . . . 190
Gasoline . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Di ese l fue l . . . . . . . . . . . . . . . . . . . . . . . . . 19 1
Refueling . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Selective catalytic reduction (Ad Blue/
DEF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Catalytic converter . . . . . . . . . . . . . . . . . . . 197
Diese l particulate filter . . . . . . . . . . . . . . . 198
E ng ine compartment . . . . . . . . . . . . . . . . . 198
E ng ine oil . . . . . . . . . . . . . . . . . . . . . . . . . . 20 1
Cooling system . . . . . . . . . . . . . . . . . . . . . . 204
B ra ke flu id . . . . . . . . . . . . . . . . . . . . . . . . . 206
Ba ttery . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Table of contents
Windsh ield washer sys tem . . . . . . . . . . . . 2 08
Service interva l display . . . . . . . . . . . . . . . 208
Wheels .. .. .. .. .. .... . ..... ... .. .. 210
Wheels and Tires .... .. .. ..... ... .. .. 210
Tire pressure monitoring system . . . . . . . 228
Care and cleaning . . . . . . . . . . . . . . . . 231
Genera l information . . . . . . . . . . . . . . . . . 231
Ca r washes . . . . . . . . . . . . . . . . . . . . . . . . . 231
Cleaning and care information . . . . . . . . . 232
Plac ing your vehicle out of serv ice . . . . . . 235
Do It Yourself . . . . . . . . . . . . . . . . . . . . 236
Emergency assistance . . . . . . . . . . . 236
General information . . . . . . . . . . . . . . . . . 236
E q uipment . . . . . . . . . . . . . . . . . . . . . . . . . 236
Replacing wheels . . . . . . . . . . . . . . . . . . . . 237
Spa re tire 242
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
Repla cing fuses . . . . . . . . . . . . . . . . . . . . . 24 4
Dr ive r sid e co ckpit fuse assignment . . . . . 245
F ront passenger si de co ckpit fuse
ass ignment . . . . . . . . . . . . . . . . . . . . . . . . 2 46
Luggage compartment fuse assignment 246
Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
Replacing light b ulbs . . . . . . . . . . . . . . . . . 248
Emergency situations . . . . . . . . . . . . 249
Genera l . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Starting by p ush ing o r towing . . . . . . . . . . 249
Start ing with jumper cab les . . . . . . . . . . . 249
U se of jumpe r cables . . . . . . . . . . . . . . . . . 250
Tow ing with a tow truck . . . . . . . . . . . . . . 251
Raising the vehicle . . . . . . . . . . . . . . . . . . . 253
Accessories and Technical Data . 255
Technical data . . . . . . . . . . . . . . . . . . . . 255
Vehicle spec ificat io ns . . . . . . . . . . . . . . . . 255
Notes about technical data . . . . . . . . . . . . 255
Weig hts . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Di mens ions . . . . . . . . . . . . . . . . . . . . . . . . . 256
C apaci ties . . . . . . . . . . . . . . . . . . . . . . . . . . 2 57
3

Instruments and indicator lights
12
Electromechanical parking brake
¢page 14
Tire pressure monitoring system./
¢page228
Tire pressure monitoring system
¢page228
Engine control (gasoline engine)./
¢page 17
Engine control (diesel engine)./
¢page 17
Malfunction Indicator Lamp (MIL)
./
¢page 17
Diesel particulate filter*
¢page 18
Engine speed limitation
¢page 18
Engine oil level
¢page 15
Engine oil sensor
¢page 18
Engine warm-up request
¢page 18
Battery charge
¢page 14
Tank system
¢page 18
Washer fluid level
¢page 19
Windshield wipers
¢page 19
Remote control key
¢page 70
Remote control key
¢page 72
Battery in remote control key
¢page29
Bulb failure indicato r
¢page 19
Rear fog lights
¢page 19
Headlight range control system
¢page 19
Adaptive light*
¢page42
Light/rain sensor
¢ page 19
Active lane assist*
¢page 97
Transmission
¢page 81
Transmission
¢page 81
Steering lock
¢page 15
Engine start system
¢page 15
Brake booster
¢page 16,
Central indicator light
¢page 10
Electromechanical power steering,
dynamic steering*
¢ page 123
Air suspension*
¢page 16
Sport different ial*
¢ page 19
Ad Blue*
¢page 194
Ad Blue"
¢page 194
Other indicator lights
--------------
Turn signals
¢page20
USA models:
cruise control system
¢page 86

Instruments and indicator lights
The indicator light can also turn on if t he fuel fill­
er cap is not closed correct ly ¢
page 192.
~ Diesel particulate filter
App lies to: veh icles w ith diesel engine and diesel particulate
filter
II Particul ate filter: System fault See owner' s
manual
The diesel pa rticulate fi lter requires regene ra ­
tion . To suppo rt the fil ter's se lf-cleaning f un c­
tion :
D rive fo r approximate ly 15 m in utes at 37 mph
(60 km/h) o r above in the S se lector lever posi ­
tion . Keep the eng ine s peed around 2 ,00 0 RPM .
The temperature increase tha t will result from
this can b urn o ff the soot in the filter. The indica ­
tor light will turn off when the cleaning has com­
p leted successf ully.
I f t he i ndicator lig ht does
not tur n o ff, drive im­
mediately to an a utho rized Audi dea ler or a uth or ­
ized A udi Service Faci lity to have the malfunction
corrected.
A WARNING
Always adapt your speed to the cu rrent
weather, road and traffic conditions . You
should never disobey traffic laws in order to
follow driving recommenda tions.
(D Tips
For add it iona l information on the diese l par­
tic ulate fi lter, see
¢ page 198.
!'7 Engine speed limitation
Applies to: veh icles with engine speed limitation
Ill Maximum engine speed: XXXX rpm
The engine speed is automatica lly lim ited to the
speed d isplayed in the instrument cluster. T his
protects the eng ine from overheating .
The engine speed limitation deactivates once the
engine is no longer in the critica l temperature
range and you have released the acce lerato r ped­
a l once .
18
If the engine spee d limitation was activa ted by
an engine cont rol malfunct ion, the ~ indicator
li ght a lso turns on. Ma ke sure that the speed
does not go above the speed displayed. Dr ive to
an a uthorized Audi dea ler or authori zed Audi
Service Facility immed iate ly to have the ma lfunc ­
t ion corrected .
(D Tips
Applies to: S models
The engine speed is lim ite d w hen t he engine
i s cold -the fu ll engine ou tput is no t av aila ­
b le . When the eng ine is at o perating tem per­
ature, the red area in the tachometer moves
to a h igher R PM range .
~c, Engine oil sensor
• Oil level sensor: system fault!
The sensor to check the eng ine o il level has
f ailed. Drive to an au thori zed A udi dealer or au­
thorized Audi Serv ice Facility immediately to have
the malfunct ion corrected .
f Engine warm -up request
0 Please warm up engine
Fuel has entered the engine oil, eithe r from low
outside temperatures or frequent short d rives.
D rive until the eng ine is warm so that the fuel in
the engine o il w ill evaporate. Avoid hig h engine
speeds, full accelerating a nd heavy engine loads
whe n doing this .
rn Tank system
II) Please refuel
If the indicato r light turns on for the first time
and t he message appears , there are about 2 .6
gallons ( 10 li ters) of f uel left in t he tank .
II) Fuel tank system malfunct ion! Please con­
tact dealer
There is a ma lf u nction in the f uel tank system .
D rive to an au thor ized A udi dealer or au thoriz ed
A udi Se rvice Fac ility immed iate ly to h ave the
malfunction cor rec ted.

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" N .... 0 0 <..:l ' Technical data
Capacities
Approximate capaci-
ties
Gasoline engine fuel tank 19.8 gal (75.0 L)
Diesel engine fue l tank 19.3 gal
(73.0
L)
Windshield washer system 3.7 qt (3.5 L)
Windsh ield and headlight washer system* 5
.2 qt (4.9
L)
Gasoline engines
A6 2.0, 4 cylinder
Maximum output SAE net hp@rpnn 252 @ 4900
-5900
Maximum torque SAE net lb-ft@ r pm 273 @ 1600 - 4700
Displacement CID (cm
3
) 12 1 (1984)
Engine oil with fi lter change
1l
Fuel
Premium unleaded (91 AKI ),¢ page 190, Fuel supply
A6 3.0, 6 cylinder
Maximum output SAE net hp@rpnn 333 @ 5300 - 6S00
Max imum torque SA E net lb-ft@ rpm 325@ 2900 - 4500
Displacement CID (cm
3
) 182 (2995)
En gine oil with filter change
1>
Fuel Premium unleaded (91 AKI) ,¢ page 190, Fuel supply
This vehicle is availab le with different specifica ­
tions in some markets (see car documentat ion).
S6 4 .0 , 8 cylinder
Maximum outpu t SA E net hp@ rpnn 4
50 @ 58 00 -6400
Max imum torque SA E net lb-ft@ rpm 406@ 1 400 - 5700
Displacement C
ID (cm
3
) 243.7 (3993)
E ngine oil with filter change
1l
Fuel
Premium unleaded (91 AKI) ,¢ page 190, Fuel supply
257

Tech nical data
Diesel engines
A6 3.0 TDI, 6 cylinder
Maximum output SAE net hp@ rpm
Max imum torq ue SAE net lb-ft@ rpm
Displacement CID (cm
3
)
Engine oil with filter change1>
Fuel ULSD No . 2, ¢ page 191, Diesel fuel
ll For specific engine oil capac ities, please see
the most current information for the USA at http :/ /www .aud iusa.com/help/ma intenance or
for Canada at http ://www .aud i.ca/ca/b rand/ en/
your _aud i/ aud i_services_a nd/Ca re_and_M a i nte­
na n ce/ schedu le.htm l or call 800-82 2-2834.
258
239@ 3500 -3750
428@ 1750 -2250
181 (2967)

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" N .... 0 0 <..:l - Consumer information
Warranty coverages
Y our Audi is co vered b y the foll owing war ran­
tie s:
- New Vehicle Limited Warranty
- Limited Warranty Against Corrosion Perfora-
tion
- Emissions Control System Warranty
- Emissions Performance Warranty
- California Emissions Control Warranty (USA
vehicles only)
- California Emissions Performance Warranty
(USA vehicles only)
Detailed information regard ing your warranties
can be found in yo ur
W arranty & M ainten ance
bookl et.
Operating your vehicle
outside the U.S.A. or
Canada
Government reg ulations in the Un ited States and
Canada require that automobiles meet specific
emission regulations and safety standards.
Therefore, vehicles built for the U .S.A. and Cana­
da differ from vehicles sold in other countries.
I f you p lan to take your vehicle outside the conti­
nenta l limits of the United States or Canada,
there is the poss ibility that:
- u nleaded fue ls for vehicles with cata lytic con­
verter may not be available;
- fuel may have a considerably lower octane rat­
i ng . Imprope r fuel may ca use engine damage;
- service may be inadequate due to lack of p roper
service facilities, tools or testing eq uipment;
- r eplacement parts may not be readily ava ilable.
- Navigation systems for veh icles built for the
U .S .A . and Canada will not necessa rily work in
E urope, and may not wo rk in other countries
outside No rth Ame rica.
Con sumer inf ormation
(D Note
Audi cannot be respons ible for mechanical
damage that could resu lt from inadequate
fuel, service or parts ava ilability.
Audi Service Repair
Manuals and Literature
Audi Official Factory Service Manuals and L itera ­
ture are published as soon as poss ible after mod­
el introduction. Service ma nuals and literature
are avai lab le to order from the Audi Tec hni cal Lit ­
erature Ordering Center at :
www.audi .t e chlit eratur e.com
Maintenance
General
Your vehicle has been designed to he lp keep
maintenance requirements to a min imum. How­
ever, a certain amount of regular maintenance is
still necessary to assure your veh icle's safety,
economy and reliab ility . For detailed vehicle
maintenance consult your Wa rranty
& Mainte­
nance book let .
Und er diff icult op erating condition s, for exam­
ple at extremely low outside temperatures, in
very dusty regions, etc., some se rvice work
sho uld be pe rformed between the intervals speci ­
fied. This app lies part icu larly to:
- oil changes, and
- cleaning or replacing the a ir filter .
@ For the sake of the environment
By regularly maintaining your vehicle, you
help make sure that emiss ion standards are
maintained, thus min imizing adverse effects
on the enviro nment.
' Important considerations for you and your
vehicle
T he increas ing use of electronics, soph istica ted
f uel injection and emission control systems, and
the genera lly increasing technica l comp lexity of
today's automobiles, have steadily reduced the ""'
259

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" N .... 0 0 <..:l ' Electronic speed limiter . . . . . . . . . . . . . . . . . 26
Electronic stabilization control
Indicator light . . . . . . . . . . . . . . . . . . . . . . .
16
Elec tronic Stabili zation Control . . . . . . . . . . 120
Sport mode . . . . . . . . . . . . . . . . . . . . . . . . 121
Emergency assistance . . . . . . . . . . . . . . . . . 236
Emergency braking function . . . . . . . . . . . . .
75
Emergency flashers . . . . . . . . . . . . . . . . . . . . 43
Emergency locking the front passenger door 32
Emergency operat ion
Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32
Luggage compartment lid . . . . . . . . . . . . . . 36
Selector lever . . . . . . . . . . . . . . . . . . . . . . . .
82
Sunroof .. .. .. ............. .. .. .. .. .. 38
Emergency release
Fuel filler door . . . . . . . . . . . . . . . . . . . . . .
194
Emergency starting . . . . . . . . . . . . . . . . . . . 249
Energy management . . . . . . . . . . . . . . . . . . 124
Indicator light . . . . . . . . . . . . . . . . . . . . . . . 14
Engine
Coolant
... ' .................. ... ' . . 204
Prewarming . . . . . . . . . . . . . . . . . . . . . . . . . 70
Start-Stop system . . . . . . . . . . . . . . . . . . . . 72
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Starting with jumper cab les . . . . . . . . . . . 249
Stopp ing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Warming up/cooling down . . . . . . . . . . . . . 66
E ng ine compartment
Opening/closing the hood . . . . . . . . . . . . .
200
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Safety precautions . . . . . . . . . . . . . . . . . . . 198
Eng ine control ( indicator light) . . . . . . . . . . . 17
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Adding . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Checking the eng ine o il level . . . . . . . . . . . 203
Fuel consumption . . . . . . . . . . . . . . . . . . . 203
Indicator light . . . . . . . . . . . . . . . . . . . . . . . 1 S
O il consumption . . . . . . . . . . . . . . . . . . . . .
202
Specif ication and viscosity . . . . . . . . . . . . . 201
Engine sound . . . . . . . . . . . . . . . . . . . . . . . . 104
Engine speed limitation (indicator light) 18
Eng ine Start/Stop mode
refer to Sta rt/Stop system . . . . . . . . . . . . . 7 4
Engine warm-up request
Indicator light . . . . . . . . . . . . . . . . . . . . . . .
18
Index
Environment
Catalytic conv erter . . . . . . . . . . . . . . . . . . .
197
Diesel particulate filter . . . . . . . . . . . . . . . 198
Proper disposal of drained engine oil . . . . 204
Unleaded fuel.... .. ............... .. 190
EPC (engine contro l) . . . . . . . . . . . . . . . . . . . . 17
ESC
Automatic post-collision braking system .
120
also refer to Electronic stabilization con-
trol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
120
ESP
refer to Electronic stabilization control . . 120
Event Data Recorder ( EDR) . . . . . . . . . . . . . 126
Exterior lighting . . . . . . . . . . . . . . . . . . . . . . . 41
Exterior mirrors
Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
D' . 1mming ........ .. .................. 45
Heating... .... .. .. ............... .. . 45
Ex terior temperature display.......... .. .
21
F
Fastening
Booster seats . . . . . . . . . . . . . . . . . . . . . . .
181
Convertible child safety seats . . . . . . . . . . 179
Infant seats . . . . . . . . . . . . . . . . . . . . . . . . 17 7
Floor mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Folding the rear seats. . . . . . . . . . . . . . . . . . . 57
Foot pedals . . . . . . . . . . . . . . . . . . . . . . . . . . 133
For the sake of the environment
Environmentally-friend ly driving . . . . . . . . 67
Fueling . . . . . . . . . . . . . . . . . . . . . . . . . . . .
192
Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Warming up the engine . . . . . . . . . . . . . . . . 70
Freeze protection
Coolant additive
Front airbags
. . .. ................ . 204
Description . . . . . . . . . . . . . . . . . . . . . . . . . 151
How they work . . . . . . . . . . . . . . . . . . . . . . 157
Frontal collisions and the laws of physics . . 140
Front seats
Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . .
130
Child restraints in the front seat . . . . . . . . 148
also refer to Seats . . . . . . . . . . . . . . . . . . . . SO
267

Index
Maintenance intervals . . . . . . . . . . . . . . . . . 208
Malfunction Indicator Lamp (MIL) . . . . . . . . 25
Massage function . . . . . . . . . . . . . . . . . . . . . . 50
Mechanical key . . . . . . . . . . . . . . . . . . . . . 28, 29
Memory function . . . . . . . . . . . . . . . . . . . . . . 52
Mirror Dimming ... .. .. ................ ... .. 45
Vanity mirror . . . . . . . . . . . . . . . . . . . . . . . . 46
Mirrors Exterior mirrors . . . . . . . . . . . . . . . . . . . . . . 45
Monitoring the Advanced Airbag System . . 159
Multifunction steering wheel. . . . . . . . . . . . . 22
N
Natural leather care/cleaning
NHTSA
Contacting . ..................... .. .
Night vision assist ............. ...... .
Cleaning the camera ................ .
Nitrogen oxide (NOx) catalytic converter
refer to Ad Blue .. ............. .... .. .
Number of seats ..................... .
0
Occupant seating positions 234
135
101
232 194
139
129
Octane rating . . . . . . . . . . . . . . . . . . . . . . . . 190
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
OFF (4-zone deluxe automatic climate con-
trol) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
OFF (deluxe automatic climate control) 61
O il
Indicator light . . . . . . . . . . . . . . . . . . . . . . . 18
also refer to Engine oil . . . . . . . . . . . . . . . 201
Oil change interval . . . . . . . . . . . . . . . . . . . . 208
On-board computer . . . . . . . . . . . . . . . . . . . . 22
On-Board Diagnostic System (OBD)
Data Link Connector (DLC) . . . . . . . . . . . . . . 25
Electronic speed limiter . . . . . . . . . . . . . . . . 26
Malfunction Indicator Lamp (MIL) . . . . . . . 25
Opening..... ......................... 27
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . 192
Hood ........ .. ................ .... 200
Luggage compartment lid . . . . . . . . . . . . . . 34
Sunroof. ..... .................. ..... 38
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
270
Opening/closing
With the central locking switch . . . . . . . . . 31
With the convenience key . . . . . . . . . . . . . . 30
Opening and closing
On the door lock cylinder . . . . . . . . . . . . . . . 32
Other consumers (efficiency program) . . . . . 23
Overview (Cockpit) . . . . . . . . . . . . . . . . . . . . . . 6
p
Paint damage
Paint number
Parking aid 233
255
Cleaning sensors/camera . . . . . . . . . . . . . 232
Parking brake
refer to Electromechanical parking brake . 75
Parking lights . . . . . . . . . . . . . . . . . . . . . . . . . 41
Parking system Adjusting the display/warning tone
... .. 118
Cleaning the rearview camera . ....... ..
110
Malfunction
. . . . . . . . . . . . . . . . . . . . . . .. 118
Parking system plus ................. . 109
Periphera l cameras
. . . . . . . . . . . . . . . . .. 113
Per ipheral display
.... ............. .. 109
T railer hitch
... .. .... ............. .. 118
also refer to Parking systems . . . . . . 109, 110
Parking systems . . . . . . . . . . . . . . . . . . . . . . 108
Rearv iew camera . . . . . . . . . . . . . . . . . . . . 110
Parking (automatic transmission) . . . . . . . . . 79
Parking (Valet Parking function) . . . . . . . . . . 39
Parts replacement . . . . . . . . . . . . . . . . . . . . 261
Pass-through . . . . . . . . . . . . . . . . . . . . . . . . . 59
PASS ENGER A IR BAG OFF light . . . . . . . . . . 159
Passenger protection . . . . . . . . . . . . . . . . . . 13 7
Pedals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Pedestrian detection . . . . . . . . . . . . . . . . . . 101
Peripheral display . . . . . . . . . . . . . . . . . . . . . 109
Physical p rinciples of a frontal collision . . . 140
Polishing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Pollen filter
refer to Pollutant filter . . . . . . . . . . . . . . . . 60
Pollutant filter . . . . . . . . . . . . . . . . . . . . . . . . 60
Power Seat adjustment . . . . . . . . . . . . . . . . . . . . . 50
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 37