height AUDI S4 2013 User Guide

252 Tire s and wheel s
diagonally . After changing a whee l, the
torque must be checked as soon as possi­
ble with a torque wrench -preferably by an
author ized Audi dealer or qualif ied work­
shop.
Low aspect ratio tires
Your Aud i is factory-equipped with low aspect
ratio t ires . These t ires have been thoroughly
tested and been selected spec ifica lly for your
model for the ir superb pe rformance, road feel
and handling under a va riety of driving condi­
tions . Ask your a utho rized Aud i dea le r for
more detai ls.
The low aspect ratio of these ti res is indicated
by a numeral of
55 or l ess in the tire's size
des ignation. The numera l represents the rat io
of the tire's sidewall height in relation to its
tread width expressed in percentage. Conven­
tional tires have a height/width ratio of 60 or more.
The performance of low-a spe ct-ratio ti re s is
p articu lar ly sensi tive to imprope r inflat ion
pressure. It i s therefore impo rt a nt th at low
aspect r atio tire s are inflated to th e specified
pr essure and tha t th e inflation pres sure is
regularly checked and maintain ed . Tire pr es­
s ure s should be checked at l east once a
m onth and alway s befor e a long trip
~ page 241, Checking tire pressure.
What you can do to avoid tire and rim
damag e
Low aspect ratio t ires can be damaged more
eas ily by impact with potho les, cu rbs, gu llies
or ridges on the road, part icu larly if the t ire is
underinflated .
I n o rder to m inim ize the o ccu rrence of impact
damage to the tires of your vehicle, we recom­
mend that you observe the following precau­
tions:
- Always maintai n recommended i nflat io n
pressures. Check your tire pressure every
2,000 miles (3,000 km) and add a ir if neces­
sary . - Drive carefully on roads with potholes, deep
gullies or ridges. The impact from driving
through or over such obstacles can damage
your tires. Impact with a curb may also cause damage to your tires.
- After any impact, immed iate ly inspect your
tires or have them inspected by the nearest
author ized Audi dealer. Replace a damaged
tire as soon as possible .
- Inspect your tires every 2,000 m iles (3,000
km) for damage and wear. Damage is not al­
ways easy to see . Damage can lead to loss of
air and under inflation, which could eventu­
ally cause tire failure.
If you believe that a
t ire may have been damaged, rep lace the
t ire as soon as possible.
- These tires may wear more quickly tha n oth­
ers.
- Please also remember that, while these tires
de live r responsive hand ling, they may ride
less comfo rtably and make more noise than
other choices .
Reduced performance in winter /cold
season c onditions
All tires are designed for certa in p urposes.
T he low aspect ratio, ult ra h igh performance
t ir es originally insta lled on your vehicle are in ­
tended for maximum dry and wet road per­
formance and handling. They are not suitable
for cold, snowy or icy weather conditions. If
you drive under those c ircumstances, you
shou ld equ ip your vehicle with all-season or
winter tires, which offe r bette r traction unde r
those conditions. We sugges t you use the rec­
ommended snow or all -se ason t ires specified
f or yo ur vehicle , or their equivalent.
Refer to~
page 250 for more detailed infor­
mation regard ing winter tires.

294 Index
Escape hand le ...
..... ... .. .. .... .. 42
Opening and closing
Rear light 39
Defective . . . . . . . . . . . . . . . . . . . . . . . . . 21
Rear view camera Parking mode 1
Parking mode 2 120
121
Rear view mirror . . . . . . . . . . . . . . . . . . . . . 51
Rear window heating . . . . . . . . . . . . . . . . . 78
Rear window sun shade . . . . . . . . . . . . . . . 53
Rear window washer system . . . . . . . . . . . 53
Recirculation mode (automatic climate
control) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Refuelling . .. .. . .......... .. .. .... . 217
Release lever for hood . . . . . . . . . . . . . . . 219
Remote control
Hom elink .. ............. .. .. .. .. . 123
Remote control key ........... .. .... .. 33
Personalizing ............. ... .. .. .. 33
unlocking/locking ....... ... .. .. .. .. 35
Remote rear lid release . . . . . . . . . . . . . . . 39
Repair manuals .. ........ .. .. .. .. .. . 280
Repairs Airbag system ............ ... .. ... 158
Replacement key . . . . . . . . . . . . . . . . . . . . 33
Replacing Windshield wiper blades ..... .. .... .. 55
Replacing bulbs ............ ... .. .. . 268
Replacing tires and wheels ... .. .. .. .. . 246
Replacing wipe r blades . .. .. .. .. .. .. .. 54
Reporting Safety Defects .... .. .. .... . 135
Reset button .. .. ........ ...... .... .. 12
Retractor .... .......... ...... ... .. . 140
Reversible floor .. ........ .. .. .. .... .. 75
Reversible mat .. ........ .. .. .. .. .. .. 73
Right hand drive ........... .... .... .. 49
Rims Cast alloy . .. .... ........ .. .. .... . 208
Roof rack .. ... ............ .. .. .. .. .. 67
Roof load .. ... .......... .. .. .. .. .. 68
Roof weight . . . . . . . . . . . . . . . . . . . . . . . 68
s
SAFE . .. .. ... ............ .. .. .. .. .. 12
Safe driving hab its ......... .. .. .. .. . 127 Safety
belt position . . . . . . . . . . . . . . . . . 141
Safety belt height adjustment ... .. .. 143
Safety belts worn by pregnant women . 142
Safety belt pretensioner . . . . . . . . . . . . . . 143
Service and disposal ............... 144
Safety belts . . . . . . . . . . . . . . . . . . . . . . . . 140
Cleaning .. ... ... ................ . 212
Danger to passengers who do not wear a
safety belt .... .. ............. .... 138
Fastening . .. .. . .. ............ .. .. 140
Height adjustment .. ... ........ .. .. 143
Improperly worn ... ........... .. .. 143
Not worn . . . . . . . . . . . . . . . . . . . . . . . . 138
Safety be lt position . . . . . . . . . . . . . . . . 141
Safety instructions ............. .... 140
Securing child safety seats ....... ... 176
Spec ial considerations for pregnant
women ...... ... .. .............. . 142
Unfa stening ... .. ... .......... .. .. 142
Warning/indicator light ......... .... 13 7
Warning light . . . . . . . . . . . . . . . . . . . . . . 17
Why YOU MUST wear them .......... 137
Worn properly ... .. ........... .. .. 139
Safety belt warning light ......... .. .. 13 7
Safety compliance sticker ........ .... 275
Safety equipment . ... ........... .. .. 127
Safety features for occupant restraint and
protection . . . . . . . . . . . . . . . . . . . . . . . . . 12 7
Safety guidelines
Seats . .... .... .. ............. .... . 58
Safety instructions
Engine compartment ........... .. .. 219
for side c urtain airbags ............. 165
for using child safety seats ...... .... 169
for using safety belts ........... .. .. 140
Monitoring the Advanced Airbag Sys-
tem .. ..... ... .. .. .............. . 158
Seat adjustment Head restra ints ... ................ 131
Seat belts
refer to Safety belts . . . . . . . . . . . . . . . . 13 7
Seat heating . . . . . . . . . . . . . . . . . . . . . . . . 78
Seating capac ity ... ............. .... 137
Seating position Driver .. .. .... .. .. ........... .. .. 128
Front passenger .. ... .......... .. .. 129
How to adjust the front seats ........ 129