2008 AUDI A4 AVANT service indicator

Battery voltage low .::::3
If the symbol illuminates, contact your authorized Audi dealer
and have the following components inspected:
• drive belt
• generator
• battery charge
Also see if the generator warning/indicator light illuminates
=> page 22. •
Defective light bulb warning ~
The defective light bulb warning tells you when a vehicle
light bulb has become defective.
If a defective bulb has been detected by the system or a light bulb
burns out, the symbol wi th a message appears in the display to
tell you which bulb is burnt out and where it is located . For example :
REAR LEFT TURN SIGNAL
After 5 seconds, the message d isappears . If you want to reca ll the
message into the display, press the CHECK button.
There are three reasons why the defective bulb message wou ld
appear in the display:
• the light bulb has burnt
out => page 328.
• the fuse is "blown"=> page 326, "Replacing a fuse" .
• the wire connec tion to the light bulb is defective .
Have the bulb replaced or the connection repaired by your autho­
rized Audi Service department .
& WARNING
• Light bulb s are pres sur ized and c ou ld expl ode whi le they are
be ing changed causing seri ou s pe rso nal inju ry .
Controls and equip ­
ment
Dri ver inf orma tio n di spl ay
& WARNI NG ( conti nued )
• Work with due care wh en h andling th e high-vol tage s ecti on of
gas disch arge (xe non
I la mp s*. Fa ili ng to d o so could result in de ath
or se riou s inj ury !
•
Ap plie s to veh ic les: with a dapt iv e ligh t
Adaptive light defective
When th is symbol illuminates, it means that adaptive light is
defective. Go to an authorized dea lership to have the headlights or
the control unit for the adaptive light repa ired. •
Speed warning system
Overview
The speed warning system helps you to keep your driving
speed below a
set speed limit.
Fig . 21 Disp lay : s pee d
wa rning syste m
.,.
irechnical data

5. Determine the combined weight of luggage and cargo being loaded on the
vehicle. That weight may not safely
exceed the available cargo and luggage
load capacity calculated in Step 4.
6. If your vehicle will be towing a trailer, load from your trailer will be transferred
to your vehicle. Consult this manual to
determine how this reduces the avail­
able cargo and luggage load capacity of
your vehicle.
- Check the tire sidewall(::::>
page 305,
fig. 221) to determine the designated
load rating for a specific tire.•
Tires and wheels 1111
Tire service life
The service life of tires depends on a lot of different things
including proper installation and balancing, correct tire
pressure and driving style.
•,
.._ ____________ __,
Tread Wear Indicator {TWI)
Fig. 219 Tire tread:
tread wear indicators
(TWO
Fig . 220 Rotating tires
for more even wear
The origina l tires on your vehicle have 1 /16 inch (1.6 mm) high "wear
indicators"=> fig . 219 running across the tread . Depending on the .,.
Vehic le care irechnical data

___ T_ ir_e _ s_ a_ n
_ d_ w_ h_ e_ e_ls _________________________________________________ _
make, there w ill be six to eight of t hem evenly p laced around the
tir e. M arks o n the tire s idewall ( for example "TWI " or oth er sy mb ols)
indicate th e positions of the tread wear indicators. Worn tires must
b e re placed . Di fferen t fig ure s m ay apply i n other
c ountr ies=> & .
Tire pressure
Incorr ect tir e p ress ure c auses prematu re wear a nd can ca use
sudden tir e blow -out . For th is r eason, tir e pressur e must b e check ed
at leas t once a month
=> pa ge 299 .
Dri ving style
Drivi ng fa st aro und curv es, heavy acce le ra ti on and ha rd bra kin g
increase tire wear .
Rotating tires for more even wear
For all four tires on your vehic le to have the same service life, we
r ecom mend t hat the front a nd rea r tires ar e rotate d accord ing to the
tire manufacturer 's suggested tire rotation interva ls. Please
r e m emb er t he fo llo wi ng :
• Ti re rotation interva ls m ay d iffer from th e vehic le servic e inter ­
vals outl ined in y our M aintenance and Warran ty Boo kle t.
• T he longer one tire is used in one location on the vehicle, the
mor e it wea rs a t ce rtain points ; the re fo re, we rec omm end that yo u
fo llow t he ti re manufactu rer's su ggested tir e rotat ion int ervals .
• Vehi cle s with front -wh eel d rive e xper ience mo re trea d wea r on
the front wheels compared to al l-wheel drive (quattro®l .
• Ple as e ro tat e ti res as
sh ow n=> page 303, fig. 220.
• Extra care must be taken when rotating direction -specific tires
=> pag e 32 4.
Wheel balancing
T he wheels on n ew vehic les are bala nced. However, various situa ­
tions during eve ryday driving can cause them to become unba l­
ance d, res ulting i n vi brat ions you ca n us ual ly f eel thro ugh t he
steering whee l. U
nba lanc ed wh eels must be rebalanced to avoid excessive wear on
s tee ring, s uspen sio n an d tir es. A w heel m ust also be reba la nced
when a new tire is install ed.
Incorrect wheel alignment
Incorrect whee l alignment can cause excessive tire wear, impairing
t he sa fety o f the vehicl e. If ti res sh ow ex cessiv e w ear, h av e the
whee l al ignm ent check ed by an autho riz ed Aud i d eal er or qualifi ed
w ork shop.
All Wheel Drive
Ve hicl es wi th qu attr o® must alw ays h ave t ires of t he sa me siz e,
construction and tread type . For deta ils
see=> page 242 .
& WARNING
Sudden tire failure can lead to loss of control , a crash and serious
personal injury!
• Never drive a vehicle when the tread on any tire is worn down
to the wear indicators .
• Especially in wet and slick driving situations , a preferably large
profile depth of the tires is necessary , and an approximately
similar profile depth of the front and rear axle tires.
• The diminished driving safety , caused by too small of a tire
profile, is negatively perceivable especially in handling , in danger
of hydroplaning when driving through deep puddles and ponds,
when driving around curves , and in braking behavior.
• Worn tires are a safety hazard , they do not grip well on wet
roads and increase your risk of "hydroplaning" and loss of control.
• Always keep chem icals that can cause tire damage , such as
grease, oil, gasoline and brake fluid away from tires .
• Tires age even if they are not being used and can fail suddenly ,
especially at high speeds. Tires that are more than 6 years old can
only be used in an emergency and then with special care and at
lower speeds .
~

________________________________________________ T_ i
_ r_e _s_ a_n_ d_ w_ h_ e_e _ l_s __ l!III
W up to 168 mph (270 km/h)3
)
Y up to 186 mph (298 km/h)3
l
Your vehicle is normally factory equipped tires, which possess
excellent driving characteristics and give your Audi optimum
driving comfort. An electronic speed
limiter => page 28will normally
prevent your vehicle from going faster than the tire speed rating
=> & .
U .S. DOT Tire Identification Number (TIN) and tire
manufacture date
This is the tire's "serial number". It begins with the letters "DOT"
and indicates that the tire meets all federal standards. The next two
numbers or letters indicate the plant where it was manufactured,
and the last four numbers represent the week and year of manufac­
ture . For example, the numbers 2205 mean that the tire was
produced in the 22th week of 2005. The other numbers are
marketing codes that may or may not be used by the tire manufac­
turer. This information is used to contact consumers if a tire defect
requires a recall.
Tire ply composition and materials used
The number of plies indicates the number of layers of rubber-coated
fabric in the tire. In general, the greater the number of plies, the
more weight a tire can support. Tire manufacturers also must indi­
cate the materials in the tire, which include steel, nylon, polyester,
and others.
Maximum Load Rating
This number indicates the maximum load in kilograms and pounds
that can be carried by the tire.
Tire quality grading for treadwear, traction, and
temperature resistance
Tread wear, traction and temperature grades=> page 309 . Maximum Permissible Inflation Pressure
This number is
the greatest amount of air pressure that should ever
be put in the tire under normal driving conditions.
Replacing tires or rims on vehicles equipped with tire
pressure monitoring system*
The wheels on your vehicle are equipped with a sensor which
constantly monitors the air pressure inside the tire, and then trans­
mits this information to the tire pressure monitoring system*. If you
are going to replace the wheel rims on your vehicle, make sure the
new rims also have these sensors. The sensors must be compatible
with the tire pressure monitoring system* on your vehicle.
If you install rims, which do not have the sensors, or have sensors
which are not compatible, then the tire pressure monitoring
system * will not work properly. In this case, the tire pressure moni­
toring system* would not be able to monitor the tire pressure or
warn you if it is necessary .
• The battery inside of the tire pressure sensor has a limited
service life.
• Always drive with the valve stem caps securely mounted. We
recommend using factory installed valve stem caps . Ask your autho­
rized Audi dealer to replace lost valve stem caps.
The installation of replacement tires with steel cord body plies in
the tire sidewall may cause malfunction of the tire pressure moni­
toring system, and is not recommended (cord material information
in molded on the tire sidewall).
Always check your tire pressure monitoring system* indicator after
replacing one or more tires on your vehicle. If the tire pressure
monitoring system * indicator flashes, or is on, your system is not
working properly. Your replacement tire might be incompatible with
your tire pressure monitoring system*, or some component of the
tire pressure monitoring system* may be damaged.
....
Vehicle care

111'1_....::::A::.:l:.!: p :.:h..:.: a:::.:: b:.::e :.:t::i c::.::: a.:..l ..:.: in :..:.:: d:.:e :.:x::..... ___________________________________________ _
A
ABS (Anti- lock Brake System)
Warning/indicator lights ... .... .... 21
Accessories . .... .... .... .... .... ... 348
acoust ic park assist . . . . . . . . . . . . . . . . . 139
Adap tive light .. ... .... ... .. ...... ... 75
defective . . . . . . . . . . . . . . . . . . . . . . . . 35
Adding Engine coo lant
282
Engine oi l ... ... .. .... .... ... .... 278
Windshield washer fluid .... .... .. 291
Additiona l accessories .. ...... ...... . 348
Additives Eng ine oi l .. ....... ....... ....... 278
Adjustable steering whee l column .. ... 134
Adjusting Instrument cluster il lumina tion ... .. . 15
Steering wheel co lumn . ...... .... 134
Advanced A irbag System . .... ... .... 191
Ch ildren ... ........... .... ... ... 211
Components ...... .... ... .... ... 194
Fr ont airbags . . . . . . . . . . . . . . . . . . . . 192
How the c ompone nts wo rk togethe r 195
Monitoring . . . . . . . . . . . . . . . . . . . . . . 198
PASSE NGER AIR BAG O FF light ..... 199
Weight -sensing mat ....... ... .... 211
Air conditioner . . . . . . . . . . . . . . . . . . . . . 128
See also Climate controls . . . . . . . . . . 125
Air conditioning Switching on and off 128
A ir distribution
C limate controls . ...... ... .... ... 130 Air outlets
Adjusting the outlets for rapid defrosting/de fogging .. ...... .... 131
Cl imate con trols ...... .... .... ... 131
Air quality sensor . . . . . . . . . . . . . . . . . . . 129
Air recirculation .. ... .... .... .... ... 128
Clima te controls .. .... ..... .. .... 129
When should I use the air recircu lation?
129
Airbag Warning/indicator lights .... ... .... 20
Airbag system . . . . . . . . . . . . . . . . . . 187 , 205
Car e ...... .... .... .... .... .... .. 201
Child restraints .... .... .... .... .. 212
Componen ts (front airbags) .... ... . 194
Danger of fitting a chi ld safety seat on the
front passenger seat . . . . . . . . . . . . 189
Disposal .. ....... .... .... .... ... 201
Front airbags . .... ... .... .... .... 191
How do the front
ai rbags work? .... 196
How many airbags does my vehicle have? 194
I mportant things to know ....... .. 1 87
I ndicator light ... .. .... .... ... ... 198
Monitoring . . . . . . . . . . . . . . . . . . . . . . 198
Repairs ...... .... ... .... .... .... 201
Side airbags ... ...... .... ... .. ... 203
Side curtain airbags (SIDEGUARD) .. 207
When must the sys tem be inspec ted? ...
198
Alloy w heels . .... .... .... .... .... .. 260
All -wh ee l driv e 242
Winter tir es ..... .... .... ... .. ... 310 A
lternator
See Generator . . . . . . . . . . . . . . . . . . . . 22
Aluminum al loy wheels . ...... .... ... 260
Ambient light ing . ....... .... ... .. .... 82
Anti-free ze
See Engine coolant system ........ 280
Anti -glare inside day -ni ght mi rro r .. ... . 90
An ti- lock B rake System (ABS)
How the ABS system works . ....... 240
Warning/indicator l ights ........... . 21
Anti -Slip R egulation Syst em (ASR)
How the sys tem works .... .... .... 238
An ti- theft systems
Anti -theft ala rm system .. ...... .... 64
Electronic immobilizer .. ... .... ... . 5 4
Tilt sensors . .... .... ... .... .... ... 65
Armrest Adjusting ...... .... ... .... ..... . 102
Storage bi n
Ashtray 1
02
Front . .... .... .... .... ... .... ... 119
Rear ...... .... .... .... ... .... ... 119
ASR Anti- Slip Regulation System .... ... 238
Asterisk What does it mean when something is marked with an asterisk? .. ... .... .. 6
Attachment hooks ... .... .... .... ... 112
Aud i Service Repa ir Manuals and Lite rature
346

Alph ab eti ca l ind ex -
-------------=----
AUTO
Climate controls ...... .... ...... .. 127
Switching on .................... 127
When should I use AUTO? ......... 127
Auto Safety Hotline ................. . 175
Auto-C heck Contro l ...... .... ... .... .. 28
Au toma tic transmission ...... .... .. 30
Manua l transmission .. ...... .... .. 29
Automa tic a ir recircu lation ........... 129
Automatic belt retractor .......... .... 181
Automat ic car was h
See Washing ...... .... ... .... .... 255
Automatic headlight control ........... 73
Automatic Sh ift Lock (ASU .. ..... 145, 152
Automatic transmission 6-speed automatic transmission 143, 144
Ign it ion key safety lock . ...... .... . 136
Shift but tons .. ...... .... .... 148, 155
Steering wheel wit h tiptronic® . 148,155
See also mu ltit ronic™ ... .. ...... .. 149
Automat ic trans mission (6 -speed)
Automat ic Shift Lock (ASU ... .. ... . 145
Driving .. .. .. .... .... ..... .. .... 1 43
Dynamic shift program ... .... .... . 146
Fa il- safe mode . ...... .... .... .... 149
Kic k-down ... .... .... .... ... .... . 146
Manual shift program (tiptronic®) .. 147
Average speed ....................... 41
Avoid damaging the vehicle .. ...... .. 245
Controls and equip­
ment Safety first
B
Battery .....
.... .... .... .... ... 285, 288
Battery location ins ide the eng ine
compartment .. ...... .... .... ... 285
Charging . ............ ........... 289
Checking battery acid level . ........ 288
Connecting .... .. ..... .... .... ... 290
Disconnecting ............ .... ... 290
Important warnings when working on the
battery ... .. .... .... .... .... ... 286
Removing the battery ... .. .... .... 290
Replacing the battery ............. 29 1
Winter operation . ................ 285
Working on the battery ............ 286
Bat tery vo ltage .. ... ... .... .... .... .. 35
Before driving ...................... 167
Blended gasoline . .... ............... 267
Body cavity sealing ...... .... .... ... . 260
Booster seats .......... .... .... ..... 218
How do I properly instal l a booster seat in
my vehicle? ... .. .... .... .... ... 218
Safety inst ructions ... .. .... .... ... 218
Brake assista nt ..... .... .... .... .... 241
Brake booster .......... ...... .... ... 240
Brake f luid
Changing the brake flu id ...... .... 284
Check ing the brake fluid leve l ...... 284
Reservoi r .... .... .... ..... .. .... . 28 4
What is the correct brake f luid level? 284
What shou ld I do if
t he brake fluid warning
l igh t comes on? ... .. .... .... .... 284 Brake system
...... .... .... .... .. 31,284
Anti -lock Brake System (ABS) ........ 21
Brake fluid ....................... 284
Brake f lu id spec ificat ions for refi ll and
replacement ..... .... .... .... ... 28 4
Brake pads ...................... 244
Warning/indicator lights ...... ...... 23
Brakes ...... .... .... .... ... .... .... 239
Adverse cond itions affec ting bra ke
performance ...... .... .... ..... 239
Break -in period ....... ........ ...... 243
Brake pads ........... .... .... ... 244
Tires .. .... ....... .... ...... ..... 243
Bu lbs .. ...... .... .... ... .... .... ... 328
C
Ca lif o rnia Pr opo sit ion 65 War ning ... .. 274
Batte ry specific . ...... .... .... .... 287
Capacities .......................... 343
Car care . .... .... ........... .... .... 254
Interior .... ... .... .... .... .... ... 261
Plastic and vinyl .... ............. . 258
Weatherstrips .... ... .. ...... .... . 259
Ca re of exterior ..... .... .... .... .... 254
Care, service and disposal Safety belt tensioner .............. 186
Cargo area
See Loading the luggage compartment .
173
Cargo net .......................... 108
Catalytic converter ...... .... .... .... 24 4
Vehicle operation Vehicle care Do-it-yourself service Technical data

Alphabetical index -
-------------=----
Convertible child seats
How do I properly ins ta ll a conve rtible
child seat in my vehicle? ......... 216
Safety instructions . ...... ...... .. 216
Convertible locking retractor
Act ivating .. .. .... .... ........... 222
Deactivating ...... .... ........... 223
Using to secure a child safety seat 220,
222
Coolant system ... .. .... .... ........ 280
Coo ling System
Expansion tank .... ....... ... .... . 281
Cornering light .. .... .... ...... .... .. 75
Cruise control . ...... .... ........... 140
Changing a stored speed .... ... .. . 140
Setting and storing a vehic le speed . 140
Switching off . ........... .... .... 141
Switching off temporari ly .......... 141
Switching on .... .... .... .... .... 140
Warning/indicator lights .. ... .... ... 21
Cruising range .................. ..... 40
Cup holder ......................... 118
D
Data .............................. 343
Data recorder ... .... .... .... ..... .. . 236
Date display ......................... 14
D aytime running lights ................ 74
dEF indication .............. ......... 15
Defogging the windows .. .... .... .... 131
Defrosting the windows ...... .... .... 131
Defrosting /defogging windows .. .... .. 131
Controls and equip­
ment Safety first
Determining
correct load limit ..... .. . 302 Dynamic shift program ... .... ...... .. 153
Digita l clock .. ...... ..... .. .... .... .. 14
Setting the time ..... ...... .... .... 14
E
Digita l compass ...................... 93
Dimensions . ....... ... .. .... .... ... 341
Dipstick Location .... .... ... .. .... .... ... 277
Doors, power locks .. ...... ....... .... 58
Drive Information System Help .. ...... .... ... .. .... .... .... 43
Driver
See Seating position ........... ... 168
Driver information display ....... .... .. 24
Mi les (ki lometers) to empty .... ... .. 26
Open door or rear lid warning .. .... . 26
Outside
temperatu ire disp lay ....... . 25 ECON
When should I use ECON? ...... ... . 128
EDL Electronic differential lock .... .... . 237
Ele ctrically heated front seats ..... ... . 132
Electronic differential lock
Warning/indicator lights ...... .... .. 21
Electronic differential lock (EDU
How the system works ............ 237
Elect ronic immobilizer . ... .... .... .... 16
Electronic power contro l
EPC warning/indicator light ....... .. 23
Parking brake warning .. .... ... .. .. 29 Electronic stabilization program
(ESP)
Sound system display
...... .... .... 25 How
the system works ............ 236
Text messages .. ....... ...... .... . 29 Warning/indicator
lights ...... ...... 22
Driver Informa tion System Emergency
closing
Menu display .. ... .... .... .... ... . 41 Power sunroof ...
.... ........... .. 69
Practical example .................. 44 Emergency
flasher .. ... .... .... ...... 79
Setting .. .... ....... ...... .... .... 43 Warning/indicator
lights ...... ...... 22
Types of disp lay ..... ...... ... .... . 42 Emergency
locking ................... 61
Driver's seat memory ................ 100 Emergency
starting ... .... ... .... .... 330
Assigning the keys ....... ... .. .... 102
Emergency towing .................. 332
Recalling a seat position .. .... .... . 101
Emergency un locking (on ly manually)
Storing a seat position ............ 101
Rear lid . ... .. .... .... ...... .... .. 62
Driver's seat cushion extension ...... .. 100
Engine
Driving messages .... .... .... .... .... 29
4-cylinder (200 hp) ...... .. .... .... 274
Driving safely ....... ... .. .... .... ... 166 6-cylinder (255
hp) ................ 275
Driving time ... .. ...... .... ... .. .... . 40 Coolant
......................... 280
Dup licate key .... .... .... ...... ... .. . 52 Hood ......
...... .... ...... ..... 272
Vehicle operation Vehicle care Do-it-yourself service Technical data

______________________________________________ A_ l_,_ p _h_ a_ b_e _t_i c_ a_l _in _ d_e _ x _ ___.fflll
Partition screen .. ... .... ......... 111
Protective liner ..... .. .... ...... .. 113
Removing luggage compartment cov-
er /partition net ... .. .... .... .... 1 11
Retractable cover ... .. .... ... .... . 110
Side Compartment ... .... ... .... . 114
Ski sack . ...... .. .... .... ...... .. 114
Tie -down strap ...... .... ......... 109
See also Loading the luggage
compartment ... .... .... ....... . 173
Lumbar support .. ...... .... ....... ... 99
M
Maintenance ..... .. ...... .... .... .. 346
Malfunct ion Indicator Lamp (M IU . ... 20, 27
Manual transmission . ...... .... .... . 142
Gearshift lever .. ...... ... .... .... 142
Master key ........ .... .... .......... 53
Battery replacement . ...... .... .... 54
Menu button ..... .. .... .... ...... ... 42
Menu input switch . ...... .... .... .... 42
Mi le age
Average .... ... .. .... .... ...... ... 40
Ins tan taneous .... .... ...... .... .. 41
M iles to empty .. .. .. .... .... .... .... . 26
Mirrors Activating the digita l compass ..... . 93
Adjusting the a nti -g lare ...... .... .. 90
Automat ic d imm ing fo r the outside
m irrors . .... ...... .... .......... 92
Automat ically dimming inside mirror . 90
Inside rearview mirror . ...... .... ... 90
Inter ior mirror .... .... ...... .... .. 90
Controls and equip­
ment Safety first
Manual glare dimming
.......... ... 90
Outside mirrors .. .......... .... ... 91
Recalling position of outside mir rors 101
Storing posit ion of outs ide m irrors .. 101
Monitoring the Advanced Airbag System 198
multitronic™ Automatic Shift Lock (ASU 152
D riving the mu ltitronic™ .. ... .... .. 150
Dynamic shift prog ram ...... .. ... . 153
Fa il- sa fe mode .... ... .... .... .... 156
Kick-down .... .... .... .... .... ... 153
Manual shi ft program ... .. .... .... 154
Selector lever .... .... .... .... .... 1 51
Steering w heel wit h tiptronic® . .... 155
tiptron ic
154
N
Nat ural leather . ...... .... ....... .... 262
New tires and whee ls . ....... ... .. ... 305
NHTSA Contacting ..... .... .... ... .. .... 175
Number of sea ts ... .. .... .... .... ... 1 76
0
Occupant seat ing pos itio ns .. .. ... .... 1 68
Octane rating .... ...... .... .... .... . 267
Odom eter .... .... ... .... .... .... ... . 15
O il
See Eng ine oi l .... .... .... .... .... 275
O lder children and safety belts ..... .. . 219 On
-Board Diagnostic System .. ... .... .. 28
Electronic speed lim iter ... .... ..... 28
Malfunc tion Indicator Lamp (M IU .. .. 27
On -Board Diagnostic System (OBD) .... . 27
Data Link Connec tor (DLC) .. .... .... 27
Open door or rear lid warning ... .. .. . .. 26
Opening Power sunroof ....... ........... .. 68
Operate your vehicle economical ly and mini -
mize pol lution .... ... .... .... ... 245
Optional equipm ent
Mark ed with an asterisk ...... ....... 6
Out lets ...... .... .... ... .... .... ... 12 1
Outside air pollution How to prevent from enter ing the veh ic le
128
Ou ts ide mirrors ....... ... .... .... .... 91
Outside temperature display .. .... ..... 25
Owner's manual How the Owne r's Man ua l is o rganized . 6
Owner's literature storage .... .... .... 123
p
Paint
Touch -up ... .. .... .... ... .... .... 258
Pain t no ...... .. .... ...... .... .... . 340
Park assis t ... .... .... ... .... .... ... 139
Parking .. .. .. ...... .... ........... . 138
Automatic t ransmission (6 -speed) .. . 143
multitronic ™ ... .... ... .... .... ... 1 50
P arking brake ...... .... .... .... ... .. 137
Setting and re leasing . ...... .. .... 137
Vehicle operation Vehicle care Do-it-yourself service Technical data