Audi TT Roadster 2011 Owner's Manual page 131

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equipment, cellular telephones and CB
radios, etc.) must be performed by a
qualified technician who has the training
and special equipment necessary.
- For any work on the airbag system, we
strongly recommend that you see your
authorized Audi dealer or qualified work-
shop.
- Never modify the front bumper or parts
of the vehicle body.
- Always make sure that the side airbag
can inflate without interference:
- Never install seat covers or replace-
ment upholstery over the front seat-
backs that have not been specifically
approved by Audi.
- Never use additional seat cushions that
cover the areas where the side airbags
inflate.
- Damage to the original seat covers or
to the seam in the area of the side air-
bag module must always be repaired
immediately by an authorized Audi
dealer.
- The airbag system can be activated only
once. After an airbag has inflated, it
must be replaced by an authorized Audi
dealer or qualified technician who has
the technical information, training and
special equipment necessary .
- The airbag system can be deployed only
once. After an airbag has been deployed,
it must be replaced with new replace-
ment parts designed and approved espe-
cially for your Audi model version. Re-
placement of complete airbag systems
or airbag components must be per-
formed by qualified workshops only.
Make sure that any airbag service action
is entered in your Audi Warranty & Main-
tenance booklet under AIRBAG REPLACE -
MENT RECORD.
- For safety reasons in severe accidents,
the alternator and starter are separated
from the vehicle battery with a pyrotech-
nic circuit interrupter.
Airbag
system
129
- Work on the pyrotechnic circuit inter-
rupter must only be performed by a
qualified dealer - risk of an accident!
- If the vehicle or the circuit interrupter
is scrapped, all applicable safety pre-
cautions must be followed.
Other things that can affect Advanced
Airbag performance
Changing the vehicle's suspension system can
change the way that the Advanced Airbag Sys-
tem performs in a crash. For example, using
tire-rim combinations not approved by Audi,
lowering the vehicle, changing the stiffness of
the suspension, including the springs, suspen-
sion struts, shock absorbers etc. can change
the forces that are measu red by the airbag
sensors and sent to the electronic control
unit. Some suspension changes can, for exam-
ple, increase the force levels measured by the
sensors and make the airbag system deploy in
crashes in which it would not deploy if the
changes had not been made. Other kinds of
changes may reduce the force levels meas-
ured by the sensors and prevent the airbag
from deploying when it should .
The sensors in the safety belt buckle for the
driver and front passenger seat tell the elec-
tronic control module if the safety belt is
latched or not. If the safety belt is being used,
the front airbag will deploy at a slightly high-
er rate of vehicle deceleration than if the safe-
ty belt is not being used . Therefore, in a par-
ticular collision, it is possible that an airbag
will not deploy at a seating position where the
safety belt is being used but will inflate at the
position where the safety belt is not being
used.
It
is important that nothing interfere
with the safety belt buckles so that the sen-
sors can send the correct information about
safety belt use to the electronic control unit.
..,.

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