Audi A7 2017 Owner's Manual page 229

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and a special procedure. You must not repair or
disassemble th em ¢ .&..
A
WARNING
Wheel bolts that are tightened or repaired in-
correctly can become loose and result in loss
of vehicle control, which increases the risk of
an accident. For the correct tightening specifi -
cation, see ¢ page 244, After changing a
wheel .
- Always keep the wheel bolts and the
threads in the wheel hub clean and free of
grease.
- Only use wheel bolts that fit the rim .
- Always have damaged rims repaired by an
authorized Audi dealer or autho rized Audi
Service Facility . Never repair or disassemble
rims yourself, because this increases t he risk
of an accident.
Winter tires
W inte r ti res significantly improve the vehicle's
handling when driving in win t er condit ions. Be-
cause of the ir constr uction (width, compound,
tread pattern), summer tires provide less trac-
tion on ice and snow .
... Use w inter t ires on all fo ur wheels .
... Only use winter t ires that are approve d for your
vehicl e.
... Please note that the maximum permitted
speed may be lower with winter tires ¢ .&_. An
authorized Aud i dealer or aut hori zed Aud i Serv-
ice Facility can inform you about the maximum
permitted speed fo r your tires .
... Check the tire pressure after installing wheels
¢ page 221.
The effectiveness of winter t ires is reduced great-
ly when the tread is worn down to a depth of
0 .157 in (4 mm). The character ist ics of winter
tires also decrease great ly as the t ire ages, re-
gardless of t he remain ing tread.
WARNING
- Never drive faster than the maxim um per-
mitted speed for your t ires. This could cause
the tires to heat up too much. This increases
Wh e el s
the risk of an accident because it can cause
the t ire to burst.
- Always adapt your driving to the road and
traffic cond itions . Drive carefully and reduce
your speed on icy or slippery roads . Even
winter t ires can lose tract ion on black ice.
@
For the sake of the environment
Reinstall summer tires at the appropr iate
time, because they prov ide better handling
when roads are free of snow and ice. Summer
tires cause less road noise, tire wear and fue l
consumpt ion.
(D
Tips
You can also use all season tires instead of
winter tires. Please note that in some coun-
tries where winter tires are required, on ly
winter tires w ith the
&
symbo l may be per-
mitted .
Snow chains
Snow chains not only improve t he driving in win-
te r road condit ions, but also the braking .
... Only install snow chains on the fron t wheels .
This applies also to vehicles with all w heel
drive * .
... Check and correct the seating of the snow
chains after driving a f ew feet, if necessary. Fol-
low th e instructions from the manufacturer.
... Note the maximum speed of 30 mph (SO km/
h). Note the local regula t ions .
Use of snow chains is only permitted with certa in
rim/tire combinat ions due to technical reasons .
Check with an autho rized Audi dealer or author-
ized Audi Service Facility to see if you may use
snow chains .
You must remove the snow chains on roads with-
out snow . Otherw ise, you could impai r dr iving
ability and damage the t ires.
A
WARNING
,_
Using incor rect snow chains or installing snow
chains incor rectly can result in loss of veh icle
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