
........ _A_ ir_ b_ a-=g :..- s.:o.y _s _t _e_ m _______________________________________________ _
• A sensor in the safety belt latch for t he driver and for the front
sea t passenge r that senses w hether t hat s afe ty bel t is la tc h ed or not
and transmits this information to the electron ic cont rol un it .
& WARNING
Damage to the front passenger seat can prevent the front airbag
from working properly .
• Improper repair or disassembly of the front passenger and
driver seat will prevent the Advanced Airbag Sy stem from func
tioning properly.
• Repairs to the front passenger seat mu st be performed by qual
ified and properly trained wo rkshop personnel.
• Never remove the front passenger or driver seat from the
vehicle.
• Never remove the uphol stery from the front passenger seat.
• Never disas semble or remove parts from the seat or disconnect
wires from it.
• Never carry sharp object s in your pockets or place them on th e
seat.
If the weight -sens ing mat in the passenger seat is punctured
it cannot work properly.
• Never carry things on your lap or carry objects on the passenger
s eat. Such items can in crease the weight regi stered by the weight
sensing mat and send the wrong information to the airbag control
unit.
• Never store items under the front passenger seat. Parts of the
Advan ced Airbag Sy stem under the pass enger seat could be
damaged, prevent ing them and the airbag system from working
properly.
• Never place seat covers or replacement upholstery that have
not been specifically approved by Audi on the front seat s.
• Seat covers can prevent the Advanced Airbag System from
recognizing child re straints or occupants on the front pas senger
seat and prevent the side airbag in the seat backrest from
deploying properly .
& WARNING (c on tinued )
• Never u se cushions , pillow s, blankets or s imilar items on the
front passenger seat . The additional padding will prevent the
weight-sens ing mat in the seat from accurately registering the
child restraint or person on the seat and prevent the Advan ced
Airbag System from functioning properly .
• If you must use a child restraint on the front passenger seat
and the child restraint manufacturer's instructions require the use
of a towel, foam cushion or something else to properly po sition
the child restraint , make certain that the PASSENGER AIR BAG
OFF light come s on and stay s on whenever the child re straint is
i nstalled on the front passenger seat.
• If the PASSENGER AIR BAG OFF light does not come on and
stay on , immediately install child restraint in a rear seating posi
tion and have the airbag system inspected by your Audi dealer. •
How the Advanced Airbag System
components work together
Th e front Advanced A irbag System and the side airbags sup plement
the protect ion offered by the fro nt three -po int safety belts with
pretens ioners and load lim iters a nd the adjustable head restra ints to
he lp red uce the risk of i nju ry in a wide range of accident and crash
si tua tions. Be su re to re ad the impo rtan t info rmat ion about safe ty
and heed the WARNINGS in this c hapter.
Deploy ment o f the Advan ced Air bag Sys tem and t he activ ation o f the
safety belt pretensioners depend on the deceleration measured by
the crash sensors and registered by the electronic contro l u ni t. Crash
sever ity depe nds on speed and decelerat ion as well as the mass a nd
st iffness of the ve hicle or object invo lve d in the crash.
W hen the elect ronic contro l uni t reg isters a low sever ity cras h and
the safety belt is being used, the airbag will not dep loy . If the safety
be lt i s no t being used , the fi rs t sta ge dep loy s, followed by t he second
stage after a much later time in the crash sequence. ..

If the electronic control unit reg isters a crash of medium severity, the
first stage of the airbag deploys follo wed by the second stage at a
much later t ime in the crash sequence -regardless of whether the
safety belt is being used or not. In higher severity crashes as regis
tered by the electronic control unit, both the first and second stages
deploy almost at the same time .
On the passenger side, regardless of safety belt use, the airbag will
be turned off if the weight on the passenger seat is less than the
amount programmed in the electronic control unit. The front airbag
on the passenger side w ill also be turned off if one of the child seats
that has been certified under Federal Motor Vehicle Safety Standard
208 has been recognized on the seat . The
PASSENGER AIR BAG OFF
light comes on and stays on to tell you when the front Advanced
Airbag on the passenger side has been turned off~
page 208, "Child
restraints on the front seat -some important things to know".
& WARNING
To reduce the risk of injury when an airbag inflates, always wear
safety belts properly .
• If you are unrestrained, leaning forward, sitting sideways or
out of position in any way, your risk of injury is much higher.
• You will also receive serious injuries and could even be killed if
you are up against the airbag or too close to it when it inflates -
even with an Advanced Airbag~
page 206. •
Safety first Vehicle OP-eration
Airbag system
More important things to know about front
airbags
Fig. 214 Inflated
front airbags
Safety belts are important to help keep front seat occupants in the
proper seated position so that airbags can unfold properly and
prov ide supplemental protection in a frontal collision.
Th e front airbags are designed to provide additiona l protection for
the chest and face of the driver and the front seat passenger when:
• safety belts are worn properly ,
• the seats have been positioned so that the occupant is properly
seated as far as possible from the airbag ,
• and the head restraints have been properly adjusted .
Because airbags inflate in the blink of an eye with great force, things
you have on your lap o r have placed on the seat could become
dangerous projectiles, and be pushed into you if the airbag inflates .
When an airbag deploys, fine dust is released. This is normal and is
not caused by a fire in the vehicle. This dust is made up mostly of a
powder used to lubricate the airbags as they deploy . It could irritate
skin .
It is important to remember that while the supplemental airbag
system is desig ned to reduce the likelihood of serious injur ies, other
injuries, for example swell ing, bruising and m inor abrasions, can also
happen when airbags inflate. Airbags do not protect the arms or the •
Vehicle care Do-it-yourselt service iTechnical data

_,___A_ i_rb _ a_,g=-- s_, y:;.. s_ t_e _m ________________________________________________ _
PASSENGER AIR BAG OFF light
( ~ I :."!l.t.~A I ~
1~ J,
i
)
Fig . 215 Section from
the in strume nt panel :
PASSENGER AIR BAG
OFF light
The PASSENGER AIR BAG OFF ligh t is located in the center of t he
ins trumen t panel => fig. 2 15 .
T he
PASSENGER AIR BAG OFF ligh t will com e on and stay on to te ll
you when the front Advanced Airbag on the passenger side has been
t u rn ed off by the ele ct ronic contro l uni t. Each t ime you t urn on t he
ignition, the
PASSENGER AIR BAG OFF light will flash fo r a few
se conds and:
• will stay on if the front passenger seat is not occupied,
• will s tay on if t here is a small ch ild or child res trai nt on the fron t
passenger seat,
• will go out if t he front passenger seat is oc cupied by a n ad ult as
registered by the weight-sensing mat .
Th e
PASSENGER AIR BAG OFF light mu st come on and stay on if the
ignition is o n and
• a ca r bed has been installed o n the front seat, or
• a rearward -facing child restraint has been insta lled on t he front
passenger seat, o r
• a forward-fac ing ch ild restraint has bee n installed on the front
passenge r seat, o r
• the weight registered on t he front passe nger seat is equal to o r
less th a n the co mb ined we ight of a typic al 1 year-o ld rest rained in one of the rear-faci
ng or forward-facing infant restraints listed in
F e d era l Mo tor Ve hicle Safe ty St anda rd 2 08 w ith which th e Adv anced
Airbag System in your vehicle was cert ified.
If the front passen ger seat is not occupied, the front airbag will not
dep loy, and t he
PASSENGER AIR BAG OFF ligh t will stay on. Never
install a rearward -facing c hild rest raint on the f ront passenger seat,
t he s afest pl ace fo r a child in any k ind of child re stra in t is a t one o f th e
seating pos it ions on the rear seat::::;,
page 208, "Child restraints on
t he fro nt sea t - so me im port an t things to kno w" and =>
page 231,
"Ch ild Safety" .
If the PASSENGER AIR BAG OFF light comes on when one of the
c onditions lis ted above is met, be sure to check the lig ht reg ularly to
ma ke certain that the
PASSENGER AIR BAG OFF lig ht stays on
c ont inuo usly whenever the ignition is on. If the
PASSENGER AIR BAG
OFF
light does not appear on and does not stay on all the t ime, stop
as so on a s it is safe to do so and
• reactivate the system by turn ing the ig nition off and then tur ning
it on again ;
• remove and reinstall the child restraint. Make sure that the c hild
restrain t is properly inst alled and that the sa fety belt for the fron t
passenger seat has been correct ly routed th rough the chi ld restra int
as desc ribe d in the ch ild restrain t manufacture r's ins tructions;
• make su re that the convertib le lock ing feature on t he safety belt
f or the front passenger sea t has been act ivate d an d that the safe ty
belt has bee n pulled tight. The belt m ust not be loose or have loops
of slac k so that t he senso r be low the safety belt latc h on the seat can
do its job::::;,
page 241.
• make s ure tha t things tha t may in crease the weight o f the chi ld
and c hild seat a re not be ing transported o n the front passe nger seat;
• mak e s ure th at th e s afety bel t tension se nso r is not blocked.
Shake the safety belt latch o n the front passenger seat back and
f orth;
• If a strap or tether is being used to t ie the child seat to the front
pass en ge r sea t, mak e sure that it is not s o tight t hat it cau ses t he ...

_______________________________________________ A_ ir_ b_ a_,,,g '--- s.:.y _s _t_ e _ m ___ _
weight-sens ing mat to measure mo re weig ht than is actually on t he
se at.
If the PASSENGER AIR BAG OFF light still does not come on and
does not stay on cont in uou sly (when the ignition is sw itched on),
• t ake the child re st raint o ff the fr ont pa ssenge r seat and in stall i t
prope rly at one of t he rear seat pos itions. Have t he a irbag system
i n sp ec ted by you r A udi d eal er i mmedi ately.
• move the child to a rear seat posit io n and make sure that the child
is prop erly restra ined in a chi ld restr aint t hat is a ppropr iate f or its
size and age .
Th e
PASSENGER AIR BAG OFF light sho uld NOT come on when t he
ign ition is on and an adult is sitt ing in a proper seating pos it io n on the
front passenge r seat. If the
PASSENGER AIR BAG OFF light comes on
and stays on or flashes for abou t 5 seco nds w hile driving, under these
circumstances, make sure that:
• t he adult on t he fr on t p asse nger sea t is prope rly se ate d on the
center of the seat cushion with his or her back up against the backrest
and the bac krest is not recline d=> page 188, "Proper occ upant
seating posit ions",
• t he adult is n ot tak ing weig ht off t he se at by h olding on to t he
passenger assist handle above the fro nt passenger doo r or
s u pp orting their weight on the armrest,
• the safety belt is be ing properly worn and t hat there is not a lot of
s la ck in t he safe ty be lt webb ing ,
• accessory seat cove rs or cushions o r othe r th ings that may cause
an in cor rect re adin g or impress io n o n the weight -sen sing m at under
the upholstery of the seat have been removed from the front
pas senge r sea t,
• a safety be lt extender has not been left in the safety belt latch fo r
t he fr ont p asse n ge r se at.
In addition to the
PASSENGER AIR BAG OFF light in t he center of the
instrument pa nel, the message
PASSENGER AIR BAG OFF or
PASSENGER AIR BAG ON w ill b riefly appear in th e inst rume nt clus ter
Controls and equip
ment Safety first Vehicle operation
display. This
is to inform the dr iver of the current front passenger
a ir bag s tatus. •
Important safety instructions on
monitoring the Advanced Airbag System
& WARNING
An airbag system that is not functioning properly cannot provide
supplemental protection in a frontal crash.
• If the airbag indicator light comes on, it means that there may
be something wrong with the Advanced Airbag System. It is possible that the airbag will inflate when it is not supposed to, or
will not inflate when it should .
• Have the airbag system inspected immediately by your Audi
dealer.
& WARNING
If the front airbag inflates, a child without a child restraint, or in
a rearward-facing child safety seat, or in a forward-facing child
restraint that has not been properly installed will be seriously
injured and can be killed .
• Even though your vehicle i s equipped with an Advanced Airbag
System, make certain that all children, especially 12 years and
younger , always ride on the back seat properly restrained for their
age and size .
• Always install forward or rear-facing child seats on the rear
seat -even with an Advanced Airbag System .
• If you must install a rearward-facing child seat on the front
passenger seat because of exceptional circumstances and the
PASSENGER AIR BAG OFF light does not appear and stay on,
immediately install the rear-facing child seat in a rear seating
Vehicle care Do-it-yourself service Technical data

........ _A_ i_rb _ a_,g,:;._ s_, y'- s_ t_e _m ________________________________________________ _
& WARNING (conti nued)
position and have the airbag system inspected by your Audi
deal er.
• A tight tether or othe r strap on a rearward-facing child
restraint attached to the front passenger seat can put too much
pressure on the weight-sensing mat in the seat and register more
weight than i s actually on the seat. The heav ier weight registered
can make the system work as though an adult were on the seat
and deploy the Advanced Airbag when it must be suppressed
causing serious or even fatal injury to the child .
• If, in ex ceptional circumstances, you must install a forward·
facing child restraint on the front passenger seat, always move
the seat into i ts rearmo st po sition in the seat's fore and aft adjust ·
ment range, as far away from the airbag as possible . The backrest
must be adjusted to an upright position. Make sure that the
PASSENGER AIR BAG OFF light comes on and stays on all the time
whenever the ignition is switched on.
& WARNING
• If the PASSENGER AIR BAG OFF light do es not go out when an
adult is sitting on the front passenger seat after taking the steps
de scribed above, make sure the adult i s properly seated and
restrained at one of the rear seating positions.
• Have the airbag system inspected by your Audi dealer before
transporting anyone on the front passenger seat .
[ i ] Tips
If the we ight-sens ing mat in the front passenger seat detects an
empty seat, the front a irbag on the passenger side w ill be t urne d off,
and the PASSENGER
AIR BAG OFF light w ill stay on .•
Repair, care and disposal of the airbags
Parts o f the a irbag system are installed at many different p laces on
your Audi. Install ing, remov ing, servic ing or repa iring a part in an
area of the ve hicle can damage a part of an airbag system and preve nt
t ha t system from working pro perl y in a coll is ion.
T here are some important thi ngs you have to know to make sure that
the effectiveness of the system will not be impa ired and that
discarded components do no t cause injury or poll ute the enviro n
ment .
& WARNING
Improper care , servicing and repair procedures can increase the
risk of personal injury and death by preventing an airbag from
deploying when needed or deploying an airbag unexpectedly:
• Never cover, obstruct , or change the steering wheel horn pad or
airbag cover or the instrument panel or modify them in any way.
• Never attach any objects such as cup holders or telephone
mountings to the surfaces covering the airbag unit s.
• For cleaning the horn pad or instrument panel, use only a soft,
dry cloth or one moistened with plain water. Solvent s or cleaners
could damage the airbag cover or change the stiffness or strength
of the material so that the airbag cannot deploy and protect prop·
erly .
• Never repair, adjust, or change any part s of the airbag system .
• All work on the steering wheel, instrument panel , front seats
or electrical sy stem (including the installation of audio equip·
ment , cellular telephones and CB radios, etc .) must be performed
by a qualified technician who ha s the training and special equip ·
ment necessary .
• For any work on the airbag system, we strongly re commend
that you see your autho rized Audi dealer o r qualified workshop.
• Never modify the front bumper or parts of the vehicle body.
liJ,,

Child Safety -
-------------------"'---
Child Safety
Important things to know
Introduction
The rear seat is generally the safest place in a collision.
The physical pr in ci ples o f wha t happens w hen yo ur vehicl e is in a crash
app ly a lso to children=>
page 199, "What happens to occupants not
wearing safety be lts?". But unlik e adu lts and teenagers, the ir
muscles and bones are not fully developed. In many respects c hildren
are at greate r risk of ser io us injury in cras hes than adults .
Because children 's bodies a re not f ully deve loped, they require
restraint systems especially designed fo r their size, weight, and body
st ruct ure. Many cou ntries and all states of t he Unite d States and
prov inces of Canada have laws req uiring the use of approved ch ild
restrain t sys tems for infan ts an d sm all ch ild ren .
I n a fronta l crash at a speed of 20 -35 mph (30-56 km/h) the forces
act ing o n a 13- pound (6 kg) infant w ill be more than 20 times the
we ight of the ch ild . This means the we ight of the child wo uld
suddenly be more than 260 po unds (120 kg). Unde r these conditions,
only a n app ropr iat e child restra int proper ly used can red uce the risk
of serious injury. Child restraints, like adult sa fety be lts, must be used
pro perl y to be effective. Use d imprope rly, they can i ncrease t he ris k
of serious injury in an accident.
C onsult the ch ild safety seat manufacturer's i nstr uctions to be s ure
t he seat is right for your child's size
=> page 234, "Importa nt safety
instructions for using ch ild safety seats" . P lease be sure to read and
heed all of the impo rtant informat io n and WAR NIN GS about child
safety, Advanced Airbags, and the insta llation of ch ild rest raints in
t his chapte r.
There is a lot you need to know about the Advanced Airbags in your
vehicle and how t hey wo rk when inf ants and childre n in child
restra ints are on the front passenger seat. Beca use of t he large
Controls and equip
ment Safety first Vehicle operation
amou
nt of importa nt info rmation, we cannot repeat i t all he re. We
urge you to read the detailed information in th is owne r's man ua l
abou t airbags and t he Advanced A irbag System in your vehicle and the
very important information abo ut transporting c hildren on the front
p assenger se at. P lea se be sure to heed the WARNIN GS - they a re
extremely important for your safety and the safety of your passe n
gers, especially infan ts and small ch il dre n.
& WARNING
• Accid ent statisti cs have shown that children are generally safer
in the rear seat area than in the front seating position. Always
re strain any child age 12 and under in the rear.
• All vehicle occupants and especially children must be
restrained properly when ever riding in a vehicle. An unre strained
or improperly restrained child could be injured by striking the
interior or by being ejected from the vehicle during a sudden
maneuver or impact. An unrestrained or improperly rest rained
child is also at greater risk of injury or death through contact with
an inflat ing airbag .
• A suitable child restraint properly installed and used at one of
the rear seating posi tions provides the highest degree of protec
tion for infants and small children in most accident situations.
& WARNING
Children on the front seat of any car even with Advanced Airbags
can be seriously injured or even killed when an airbag inflates. A
c hild in a rearward -facing child safety seat ins talled on the front
passenger seat will be seriously injured and can be killed if the
front airbag inflate s.
• The inflating airbag will hit the child safety seat or infant
c arrier with great force and will sma sh the child safety seat and
child against the backrest, center armrest, or door . •
Vehicle care Do-it-yourself service Technical data

lffll.,___C_h_ i_ ld _ S_ a_ f_ e_ t_:!, y :...._ _________________________________________ _
& WARNING (conti nued)
• Always install rear-facing child safet y seat s on the rear seat.
• If you must install a rearward facing child safety seat on the
front passenger seat in exceptional circumstances and the
PASSENGER AIR BAG
OFF light do es not come on and stay on,
immediately in stall the rear-facing child safety seat in a rea r
seating position and have the airbag system inspected immedi
ately by you r Audi deale r.
& WARNING
If, in exceptional circumstances , you must in stall a forward-facing
child restraint on the front passenger' s seat:
• Always make sure the forward-facing seat has been designed
and certified by its manufacturer for use on a front seat with a
pas senger front and side airbag.
• Always follow the manufacturer 's instructions p rovided with
the child safety seat or carrier.
• Always move the passenger seat into its rearmost position
in
the seat's fore and aft adjustment range, as far away from the
airbag as possible before install ing the child restra int . The back
re st must be adju sted to an upright position .
• Always make sure that the PASSENGER AIR BAG OFF light
c omes on and stays on all the time whenever the ignition is
switched on .•
Advanced front airbag system and children
Your vehicle is equipped with an "Advanced Airbag System" in compli
ance wi th Uni ted St ates Federa l Mo to r Vehicle Safety St andar d
(FMVSS) 208 as applicable at the time your veh icle was manufac
tu red . The Advanced A
irbag system in yo ur vehicle has been certif ied to
mee t the "low -r is k" requiremen ts fo r 3-and 6-ye ar old ch ildre n on
t he passenger side and small adults on the dr iver side . The low risk
dep loyment criteria are inten ded to reduce the risk of injury through
interaction with the a irbag t hat can occur, for example, by being too
close to the stee ring wheel an d instr ument panel when the airbag
inflates. In addi tion, the sy stem has been certified to comp ly with t he
"suppression" requirements of the Safety Standa rd, to t urn off the
fron t air bag for infan ts u p to 1 2 months who a re res tra ined on the
front passenger seat in child restrai nts that are listed in the Stan
d ar d.
Even thoug h your vehicle is equipped with an Advanced Airbag
system , a ll ch ildren, especially those 12 years and yo unger, should
always r ide in t he back seat p roperly restrained for t heir ag e and si ze .
Th e ai rbag on the passenge r si de makes the front seat a potentia lly
dange rous p lace for a child to r ide. Th e front seat is not th e safest
place fo r a child in a forward- facing c hild safety seat. It can be a very
d an ge rous p lace for a n infan t or a large r chil d i n a re arwa rd-facing
seat. •
Advanced Airbags and the weight-sensing
mat in the front seat
Th e Advanced A irbag System i n your ve hicle de tects t he p resence o f
an infa nt o r ch ild in a child rest rai nt on the fro nt passenger sea t using
the we ight-sens ing mat in the seat cushion and the senso r be low the
saf ety belt la tch o n th e front passenge r seat tha t measur es t he
tension on the safety belt.
Th e weigh t-sens ing ma t me asures tot al we ight of the child and the
child safety seat and a child blanket on the fro nt passe nger seat . The
we ight on the fro nt passenger se at is re late d t o the desi gn of the
child res traint and i ts "footpri nt", the size and shape of t he bottom
of the ch ild restraint as it sits o n the seat . The weight of a child
restrain t an d its "foo tpr int" vary for differe nt kinds of child res tra ints .,_

-----------------------------------------~C~ h~il ~d ~ S~a _!fe ~ t !;YL __
and for the different models of the same kind of child restraint
offered by child restraint manufacturers.
The weight ranges for the individual types, makes and models of ch ild
restraints that the NHTSA has specified in the Safety Standard
together with the weight ranges of typical infants and typical 1 year
old child have been stored in the control unit of the Advanced Airbag
System. When a child restraint is being used on the front passenger
seat with a typical 1 year-old chi ld, the Advanced Airbag System
compares the weight meas ured by the weight sensing mat with the
information stored in the electronic control unit .
The electronic contro l unit a lso registers the tension on the front
passenger safety belt. The tension on the safety belt for the front
passenger seat will be different for an adult who is properly using the
safety belt as compared to the tension on the belt when it is used to
attach a child restraint to the seat . The sensor below the latch for the
safety belt for the front seat passenger measures the tension on the
belt. The input from this sensor is then used with the weight to
"decide", whether there is a child restraint with a typical 1 year-old
child on the front passenger seat and whether or not the airbag must
be turned off .•
Child restraints and Advanced Airbags
Regardless of the child restraint that you use, ma ke sure that it has
been certified to meet United States Federal Motor Vehicle Safety
Standards and has been ce rtified by its manufacturer for use with an
airbag . Always be sure that the child restraint is properly installed at
one of the rear seating positions. If in exceptional circumstances you
must use it on the front passenger seat, carefully read all of the infor
mation on ch ild safety and Advanced Airbags and heed all of the
app licab le WARNINGS. Make certain that the child restra int is
correctly recognized by the weight-sensing mat inside the front
passenger seat, that the front passenger airbag is turned off and that
the airbag status is always correctly signaled by the
PASSENGER AIR
BAG OFF
light.
Controls and equip ment Safety first Vehicle operation
Many types and models of child restra
ints have been available over
t he years, new models are introduced reg ularly incorpo rating new
and improved designs and older models are taken out of product ion.
Chi ld restraints are not standardized. Child restraints of the same
type typ ically have d ifferent weights and sizes and differe nt 'foot
prints,' the size and shape of the bottom of the child restraint that
sits on the seat, when they are installed on a vehicle seat . These
differences make it virtually impossib le to certify compliance with
t he requirements for advanced airbags with each and every chil d
restra int that has ever been sold in the past or will be sold over the
course of the useful life of your vehicle.
For this reason, the United States Nationa l Highway Traffic Safety
Administration has published a list of specific type, makes and
mode ls of child restra ints that must be used to cert ify compliance of
the Advanced Airbag System in yo ur vehicle with the suppression
requirements of Federal Motor Veh icle Safety Standard 208. These
child restraints are:
A. Car beds, manufactured on or after September 1,
2004:
• Cosco Dream Ride 02-719
B. Rear facing child restraint systems,
manufactured on or after September 1, 2004:
(When the restraint system comes equipped with a removable base,
compliance has to be cert ified with or without the base) .
• Britax Handle with Care 191
• Century Assura 4553
• Century Smart Fit 4543
• Cosco Arriva 02727
• Evenflo Discovery Adjust Right 212
• Evenflo First Choice 204
• Graco Infant 8457
Vehicle care Do-it-yourself service Technical data