2013 AUDI A4 SEDAN steering wheel

240 Tires and wheels
Tire service life
The service life of tires depends on a lot of
different things including proper installation
and balancing, correct tire pressure and driv­
ing style.
F ig. 176 Tire tread: tre ad wea r ind icators (TWI)
_____ __,.J)
F ig. 1 77 Rotat ing t ires for more ev en wea r
Tread Wear Indicator (TWI)
The o rigi na l t ires on your veh icle have
1/16 inch (1.6 mm) high "wear indicators"
c::> fig . 176 running across the tread. Depend ­
i ng on the make, there will be six to eight of
them evenly p laced around the t ire. Marks on
the tire sidewa ll (for example "TWI" or other
symbols) indicate the positions of the tread
wear ind icators . Worn t ires must be replaced .
Different fig ures may apply in o ther countries
c::> & .
Tire p ressure
Incorrect tire pressure causes premature wear
a nd can cause sudden t ire blow-out. For th is
reason, tire pressure must be checked at least
once a month
c::> page 236.
Driving style
Driving fast aro und curves, heavy acce leration
and hard braking increase tire wear.
Rotating tires for more even wear
F or all four tires on your ve hicl e to h ave the
same service life, we recommen d that t he
front and rear t ires are rotated according to
the tire manufact urer's suggested tire rota­
tion intervals. Please remember the follow­ ing :
- Tire rotation intervals may differ from the
vehicle service inte rva ls o utlined in your
Ma intenance and Warranty Book let .
- The longer one tire is used in one location
on the vehicle, the more it wears at certain
points; therefore, we recommend that you
follow the tire manufact urer's suggested
tire rotation intervals .
- Vehi cles w ith front-wheel dr ive experience
more tread wear on the fro nt w heels com­
pa red to all wheel d rive (quattro ®).
- Please rotate tires as shown
c::> fig. 177.
-Extra care must be taken when rotating di-
rection-specific tires
c::> page 2 5 7 .
Wheel balancing
The wheels on new ve hicles are balanced .
However, various situations during everyday
driving can cause them to become unba l­
anced, re sulting in vibrat ions you can usually
feel through the steer ing wheel.
Un balanced whee ls must be rebalanced to
avoid excessive wear on steering, suspension
and t ires. A whee l m ust also be reba lanced
when a new tire is insta lled.
Incorrect wheel alignment
Incor rect wheel alig nment can cause exces ­
sive tire wear, impairing the safety of the veh i­
cle . If tires show excessive wear, have the
whee l alignment checked by an aut hori zed
Audi dealer or qualif ied workshop .
All wheel drive
Vehicles with q uattro ® mus t always have tires
of the same size, construction and tread type .
For details see
c::> page 189. ..,.

A
Accessories . . . . . . . . . . . . . . . . . . . . 60, 274
AC (automatic climate control) ... .. .. .. 69
adaptive cruise control Vehicles with manual transmission 99
Adaptive cruise control ...... .. .. .. .. .. 97
C leaning sensors/camera ... ... .. .. . 201
Messages .. ................ ... ... 105
Request for driver intervention . . . . . . . 103
Setting the driving program .. .. .. .. . 102
Adaptive dampers .......... .. .. .. .. . 111
Adaptive light ................ ... ... . 44
Adaptive Light (defective) ......... .. .. 22
Adding Engine coolant ........... .. .. .. .. .
Engine oil .. ................ ... .. .
Windshield washer fluid ......... .. .
Additional accessories
Additives 223
220
229
274
Engine oil .. ............. .... .. .. . 220
Adjustable steering column ... ... .. .. .. 72
Adjusting Air distribution (automatic climate con-
trol) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
I nstrument illumination ... .. .. .. .. .. 47
Steering column .................... 72
Temperature (automatic climate control) 70
Airbag Warning/indicator lights ... .. .. .. .. .. 20
Airbag system . . . . . . . . . . . . . . . . . 144 , 161
Advanced Airbag System ....... ... .. 148
Advanced Airbag System components . 151
Care . .. ... . .... ... ..... ..... .. ... 157
Children . .. ............. .... .. .. . 166
Child restraints ........... .. .. .. ... 167
Components (front airbags) . . . . . . . . . 151
Danger of fitting a child safety seat on
the front passenger seat . . . . . . . . . . . . 145
Disposal . .. .. ........... .. .. .. ... 157
Front airbags . . . . . . . . . . . . . . . . 148, 149
How do the front airbags work? . . . . . . 153
How many airbags does my vehicle
have? 151
How the Advanced Airbag System com-
ponents work together .... .. .. .. .. . 152
Important things to know .. .. .. .. .. . 144
Index 277
Indicator light ..... ............... 155
Monitoring . ... .... ............... 155
PASSENGER AIR BAG OFF light ....... 155
Repairs ... .. .. .. ................. 157
Safety instructions ................. 157
Side airbags ..... .. ............... 159
Side curtain airbags .. .... .. .... .... 162
Weight-sensing mat ............... 166
When must the system be inspected? . 155
all-wheel drive .. .. ................. 189
Alloy wheels .. .... .. ............... 204
All wheel drive Winter tires . .. .. .... ........... .. 245
Anti-free ze
refer to Engine coolant system ... .. .. 222
Anti-lock braking system ............ . 184
Warning/indicator lights ............ . 19
Anti-slip regulation ................. 184
Anti-theft alarm warning system ... .. .. . 32
Anti-theft systems Electronic immobilizer ............... 38
Armrest .. .. .. .. .. .. . ... ...... ... .. . 56
Ashtray ...... .. .. .................. 59
Asterisk What does it mean when something is
marked with an asterisk? . . . . . . . . . . . . . . 6
Audi braking guard
refer to braking guard . ........... .. . 97
Audi drive select . . . . . . . . . . . . . . . . . . . . 111
Adaptive dampers .. .............. . 111
Description . . . . . . . . . . . . . . . . . . . . . . . 111
Dynamic steering . .... ......... .. .. 111
Setting the driving mode ........ .. .. 112
Sport differential . .... ............. 111
Audi Service Repair Manuals and Litera-
ture 272
AU TO
Automatic climate control . . . . . . . . . . . . 70
Automatic headlights . ...... ... .. .. . 44
Auto Lock ... ... .... ................ 32
Automatic belt retractor ............. 139
Automatic car wash
refer to Washing . .. ........... .... 200
Automatic climate control Air vents . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Operation . . . . . . . . . . . . . . . . . . . . . . . . . 69
Setup ........ .. .. . ............... 71
•
•

-----------------------------~I~ n~d~ e~x 285
Parking system (rear, with rea r view cam ­
era) Park ing mode 1 ......... ... .. .. .. . 1 18
Park ing mode 2 .......... .... .. ... 119
Safety precautions ........ .. .. .. .. . 116
Sw itching on/off .............. .... 117
Sw itching rear view camera on/off ... . 120
Parts rep lacement . ..... ... .. .. .. .. . 274
P ass-t hrough . . . . . . . . . . . . . . . . . . . . . . . . 66
PASSENGER AIR BAG OFF light . . . . . . . . 155
P assive safety system .... ... .. .. .. .. . 126
P eda ls .. .. ... ...... ............. .. 13 1
Phys ica l pr inc iples of a frontal coll is ion . 137
P olishing .. .. ............. .. .. .. .. . 20 1
Pollutant filter (automatic AC system) . .. 68
Powe r
seat adjustment . . . . . . . . . . . . . . . . . . . . 56
P ower locking sys tem ....... .. .. .. .. .. 3 2
E mergency locking . . . . . . . . . . . . . . . . . . 3 7
Power windows ... .... ... .. .. .. .... 41
Rear lid .... .... .. .... ... .. .. .. .... 39
Selective unlock feat ure ... .. .. .. .. .. 37
Sett ings . .. ............. .... .. .... 37
Sliding/tilting sunroof ..... .. .. .. .. .. 41
P owe r steering
refer to Electro-mechanical power as­
sist
. .. ... . .... ............. .. .. .
Powe r window 188
Conven ien ce opening/ closing . .. .. .. .. 41
Powe r windows ......... ...... .... ... 40
C hi ld safety locks ............ .... ... 40
M alf unct io ns ............ .... .. .. .. 42
Pregnant women Special cons iderations when weari ng a
safety belt . . . . . . . . . . . . . . . . . . . . . . . 141
Proper occupa nt seating positions .. .. . 127
P rope r safe ty belt pos it ion ... .. .. .. .. . 14 0
Proper seat ing pos ition
Front passenger . ............. ... .. 128
Occupa nts ..... ........... ... ... .. 127
Rear passengers ............... .... 129
Q
Quartz clock ............... ... ... ... 12
quattro ®
refer to all-whee l dr ive
189 Question
What happens to unbe lted occupants? 137
Why safety belts? . . . . . . . . . . . . . . . . . 136
R
Radiator fan 224
Rain/ light sensor
H ead ligh ts .. .. .. ................. . 44
Inte rmit ten t (w indshie ld w ipers) . .. .. . SO
Senso r defec tive . . . . . . . . . . . . . . . . . . . . 22
Read ing lights . .. .... ... ....... ...... 47
Rear door su n shade . .. ... .... ... .. .. . 49
Rea r fog lights .. .. ................. . 44
Rear lid
Emergency re lease .. .............. .. 39
E scape handle ... .. . .. .. .. ... ... .. . 40
Open ing and closing ... ..... ... .... . 39
Rear light
Defective . . . . . . . . . . . . . . . . . . . . . . . . . 21
Rea r view came ra
118
119
Pa
rking mode 1
Parking mode 2
Rea r view m irror
· · · · · .. ......... .. .. . 48
Rear window heat ing 70
Rear window sun shade .. ..... ... .. .. . 49
Recircu lation mode (automat ic cl imat e
control) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Refuel ling .. .. .. .. ................. 212
Re lease lever for hood
Remote control 215
Homel in k ... .. .. ................. 121
Remote contro l key. . . . . . . . . . . . . . . . . . . 33
Pe rsonalizing .. .. .. . .. .. ..... ... .. . 33
unlocking/locking .. .............. .. 35
Remote rear lid re lease .. ..... ... .. .. . 39
Repair ma nuals .. .. ... ............ .. 272
Repairs Airbag system ... .. . .. .. .. ... ... .. 157
Rep lacement key .... . .. ..... ... .. .. . 33
Rep lac ing
Windsh ie ld wiper b lades ........ ..... 51
Rep lacing bu lbs . .. ................. 261
Rep lacing tires and wheels ..... ... .. . .
Repo rting Saf ety Defects ............ .
Reset button
. ... .. .. . ...............
Retr actor ... .. .. .. .. .. ........... ..
242
134
12
139
•
•