Safety belt preten-
sioners
How safety belt pretensioners work
In fron t, side and rear-end collisions above a
parti cular severity and in a rollover, safety
belts are tensioned automatically .
Reversible safety belt tensioners
The safety belts on the front seats are equip-
ped wit h power reve rsible tensioners . The fo l-
lowing funct ions are available when the dr iv-
e r's/fron t passenger 's safety belt s are fas-
tened :
- Automatic tensioners: at the start of a d rive,
the safety be lts automatically adjust to the
passenge r aft er a certai n time period or ve-
hicle speed. To switch t he automa t ic ten-
sioners off, select the fo llow ing in the MMI:
I CARI funct ion button > (Car)* systems > Ve·
hide sett ings
> Seats > Driver's seat or Pas-
senger's seat
> Automat ic belt tensione r >
Off .
- In certa in driving situations, the safety belts
may t ighten with a reversib le tensioning
function
¢ page 192 .
- The safety belts may also tighten with this
revers ible tension ing funct ion in mino r colli-
s ions .
Pyrotechnic safety belt pretensioners
The safety be lts are equipped with safety be lt
pretensioners. The system is activated by sen-
sors in fron t , side and rear-end collisions of
great severity and in a rollover . This tightens
the bel t and takes up be lt slack ¢ &.
in Service
and disposal of safety belt pre tensioner on
page 146.
Taking up the slack helps to redu ce
forward occup ant movemen t du ring a colli-
sion.
A WARNING
- It is possib le for t he pre t ensioners to de-
ploy incor rect ly.
- The pyrotechnic syst em can only provide
protection for one collision. If the pyro -
Sa f ety belts 145
technic pretensioners deploy, the preten-
sioning system must be replaced .
(D Tips
The pyro t echnic safety be lt pret ensioners
ca n only deploy once .
- The safety belt pretensioners do not de-
ploy in minor frontal and s ide collisions,
in rear-end collisions, in rollovers and in
collisions involving very little impact
force.
- A fine dust is released when the pyro-
technic safety be lt pretensioners dep loy.
This is normal and is not caused by a fire
in the vehicle.
- The relevant safety requi rements must
be observed when the vehicle or compo-
nents of the system are scrapped . A
qualified dealership is fam iliar with
these regulations and will be please d to
pa ss o n the information to yo u.
- Be sure to observe all safety, env iron-
ment al and ot her regu lat ions if t he vehi-
cle or ind ividu a l part s of the system, par-
t icular ly the safe ty belt or airbag, are to
be disposed. We recommend you have
your authorized Aud i dealer perform this
service fo r you .
Service and disposal of safety belt
pretensioner
The safety belt pretens ione rs are parts of the
saf ety be lts on your Audi. Insta lling, remov-
ing, se rvicing o r repair ing of be lt pret ension-
ers can d am age the safety belt system and
prevent it from working correctly in a colli-
sion.
The re a re some impo rtan t t hings you have t o
know to ma ke su re t hat the effectiveness of
t he sys t em will not be impaired and tha t dis-
carded components do not cause injury or pol -
lute the environment . ..,_
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