height AUDI S8 2008 Owner's Manual

-Safety belts
---=---------------------------------
Automatic safety belt retractors
Every safety belt is equipped with an automatic belt retractor on the
shoulder belt. This feature locks the belt when the belt is pulled out
fast, during hard braking and in an accident. The belt may also lock
when you drive up or down a steep hill or through a sharp curve. During normal driving the belt lets you move freely.
Safety belt pretensioners
The safety belts are equipped with a belt pretensioner that helps to
tighten the safety belt and remove slack when the pretensioner is
activated. The function of the pretensioner is monitored by a
warning
light=> page 19.
Switchable locking feature
Every safety belt except the one on the driver seat is equipped with
a switchable locking feature that
must be used when the safety belt
is used to attach a child seat. Be sure to read the important informa­
tion about this
feature => page 253.
& WARNING
Improperly positioned safety belts can cause serious injury in an
accident=> page 214, "Safety belt position" .
• Safety belts offer optimum protection only when the seat back
is upright and belts are properly positioned on the body.
• Never attach the safety belt to the buckle for another seat.
Attaching the belt to the wrong buckle will reduce safety belt
effectiveness and can cause serious personal injury.
• A passenger who is not properly restrained can be seriously
injured by the safety belt itself when it moves from the stronger
parts of the body into critical areas like the abdomen.
• Always lock the convertible locking retractor when you are
securing a child seat in the vehicle
=> page 255. •
Safety belt position
Correct belt position is the key to getting maximum
protection from safety belts.
., N
8
~
Fig . 226 Head restraint
and safety belt
posi­
tion as seen from the
side
Use the height adjustment to change the position of the shoulder
belt of the front safety belts.
& WARNING
Improperly positioned safety belts can cause serious personal
injury in an accident .
• The shoulder belt portion of the safety belt must be positioned
over the middle of the occupant's shoulder and never across the
neck or throat.
• The safety belt must lie flat and snug on the occupant's upper
body
=> fig. 226. Pull on the belt to tighten if necessary.
• The lap belt portion of the safety belt must be positioned as
low as possible across pelvis and never over the abdomen. Make
sure the belt lies flat and snug
=> fig. 226. Pull on the belt to
tighten if necessary.
• A loose-fitting safety belt can cause serious injuries by shifting
its position on your body from the strong bones to more vulner-
able, soft tissue and cause serious injury.
...

___ s_a _f _e _t -=-y _ b_ e_lt _s ______________________________________________ _
Adjusting safety belt height Use the safety belt height adjustment to change belt posi­
tion on the shoulder.
Fig . 229 Adjusting
shoulder belt height
The safety belt height adjustors for the front seats can be
used to adjust the height of the shoulder portion of the
safety belt so that it is positioned correctly.
- Push the
latch ~ fig. 229 up or down so that the shoulder
portion of the safety belt is positioned nearly midway
over the
shoulder ~ & in "Safety belt position" on
page 214.
& WARNING
Always read and heed all WARNINGS and other important informa­
tion
~ page 212. •
Improperly worn safety belts
Incorrectly positioned safety belts can cause severe inju­
ries.
Wearing safety belts improperly can cause serious injury or
death. Safety belts can only work when they are correctly positioned on the body. Improper seating
positions reduce
the effectiveness of safety belts and will even increase the
risk of injury and death by moving the safety belt to critical
areas of the body. Improper seating positions also increase
the risk of serious injury and death when an airbag deploys
and strikes an occupant who is not in the correct seating position. A driver is responsible for the safety of all vehicle
occupants and especially for children. Therefore:
- Never permit anyone to assume an incorrect sitting posi­
tion in the vehicle while
traveling ~& .
& WARNING
Improperly worn safety belts increase the risk of serious personal
injury and death whenever a vehicle is being used.
• Always make sure that all vehicle occupants are correctly
restrained and stay in a correct seating position whenever the
vehicle is being used.
• Always read and heed all WARNINGS and other important infor­
mation
~ page 212. •
Safety belt pretensioners
How safety belt pretensioners work
In front, side and rear-end collisions above a particular
severity, safety belts are tensioned automatically.
The safety belts are equipped with safety belt pretensioners . The
system is activated by sensors in front, side and rea r-end collisions
of great severity . This tightens the belt and takes up belt
slack ~ &
in "Service and disposal of safety belt pretensioner" on page 217.
Taking up the slack helps to reduce forward occupan t movement
during a collision.
•

___ A_ ir_b _a_ g;::;_ s-=-- y_s _t _e _m _________________________________________________ _
& WARNING
Changing the vehicle's su spension includ ing use of un approved
tire -rim combinations can change Advanced Airbag performance
and increase the ris k of serious pe rsonal injury in a crash .
• Never install suspen sion components that do not have the
same performance chara cteristi cs as the components or iginally
installed on your vehicle.
• Never use tire-r im combinations that have not been approved
by Audi.
& WARNING
Items stored between the safety belt buckle and the center
c onsole can cause the sensors in the buc kle to send the wrong
information to the electroni c control module and prevent the
Advanced Airbag System from working properly .
• Always make sure that nothing can interfere with the safety
belt buckles and that they are not obstructed .
W For the sake of the environment
Undeployed airbag modules and pretensioners might be c lassified
as Pe rchlora te Mat erial -s pecia l handling may a pply, see
www.dtsc.ca.gov/hazardouswaste/perchlorate. When the vehicle or
par ts o f the res train t syst em inclu ding airbag mod ules sa fety be lts
with pretensioners are scrapped, all applicable laws and regu la ­
tions must be o bse rved. You r au thor ize d A udi d ealer is fami liar wi th
these requirements and we recommend that you have you r dea ler
perfo rm this service for you. •
Knee airbags
Description of knee airbags
Th e a irba g sys tem ca n prov id e suppl emen tal prot ect ion
t o pro perly res tra ined front s eat occ upa nts.
0
Fig . 2 34 Dri ver' s
airba g
The airbag for the driver is located in the instrument panel under ­
neath the steering
whee l=> fig . 234 , the airbag for the passenger is
at about the same height in th e instrument panel und erneath the
glove compartment.
T he k nee air bag offer s addi tio nal pr otec tion to the driver 's a nd
passenger 's knees and upper and lower thi gh areas as a supple ­
me nt to t he safet y belts.
I f the front airbags deploy , the knee airbags also deploy in frontal
collisions above a certain
se verity => page 227, "M ore important
thi ngs to know about fron t a irba gs" .
B esides their normal safety function, safety be lts wor k to help keep
th e drive r o r fr on t pas seng er in pos itio n in case of a fro ntal co llis io n
so that the airbags can provide protection .
T he airbag system is not a su bstitute for your safety belt . Rathe r, it
i s part o f the overa ll occupa nt res traint system i n yo ur veh icl e.
A lwa ys re member that the airbag system can on ly help to protect
you if you a re weari ng your safe ty belt and wea ring it p roperly . T hi s
liJ,,

___ C_h _i_ld _ S_a _f_e _t ~y ____________________________________________ _
0 Note
On vehicles with power individual rear seats* some criteria must be
observed when attaching the child restraint using the
LATCH
system:
• To attach the child restraint securely, the seat must be moved to
the farthest rear position, the seat height set to the lowest position and the head restraint must be adjusted to the vertical position
=> page 97.
• If a child safety seat is attached to one of the rear seats, this seat
must not be adjusted using the power controls under any circum­
stances. The easy entry function for this seat must also be deacti ­
vated in the
MMI => page 100 . The child safety seat as well as the
rear seat can be damaged by the adjustment process .•
Mounting and releasing the anchorage hook
If you use a child restraint system with hooks or other
latches attached to adjustable straps.
Mounting
- Press the anchorage hook with the spring catch release
onto the lower anchorage so that the anchorage hook
locks into place .
- Pull on the anchorage hook to make sure that it has
securely engaged the lower anchorage.
- Tighten the strap following the child restraint manufac­
turer's instructions.
Releasing
-Loosen the tension on the strap following the child
restraint manufacturer's instructions .
- Depress the spring catch on the hook. -
Hold the spring catch in depressed position.
-Move the hook in the direction of the vehicle floor so that
there is enough space to release the anchorage hook
from the lower anchorage.
& WARNING
• Improper installation of child restraints will increase the risk of
injuries in a crash.
• Always refer to the child restraints manufacturer's instructions
for proper installation of the child restraint and proper use of the
lower anchorages or safety belts in your vehicle.
•
Tether anchors
Fig . 251 Tether
anchors: recess flaps
behind the rear seat­
backs
Beginning with model year 2000 , the rear seating positions are
equipped with three tether anchors .
The tether anchors for the three rear seating positions are located
in recesses in the rear window
shelf=> fig. 251 . Vehicles with power
individual rear seats* are equipped with two tether anchors.
.,

Tires and wheels -
----------------
•
& WARNING (continued)
crashes and serious personal injuries . Have worn or damaged tires
replaced immediately.
• 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
low speed.
Glossary of tire and loading terminology
Accessory weight
means the combined weight (in excess of those standard items
which may be replaced) of automatic transmission, power steering,
power brakes, power windows, power seats, radio, and heater, to
the extent that these items are available as factory-installed equip­
ment (whether installed or not).
Aspect ratio means the ratio of the height to the width of the tire in percent.
Numb ers of 55 or lower indicate a low sidewall for improved
steering response and better overall handling on dry pavement.
Bead
means the part of the tire that is made of steel wires, wrapped or
reinforced by ply cords and that is shaped to fit the rim.
Bead separation
means a breakdown of the bond between components in the bead.
Cord
means the strands forming the plies in the tire.
& WARNING (continued)
• Never mount used tires on your vehicle if you are not sure of
their
"previous history." Old used tires may have been damaged
even though the damage cannot be seen that can lead to sudden
tire failure and loss of vehicle control.
• If you notice unusual vibration or if the vehicle pulls to one side
when driving, always stop as soon as it is safe to do so and check
the wheels and tires for damage.
•
Cold tire inflation pressure
means the tire pressure recommended by the vehicle manufacturer
for a tire of a designated size that has not been driven for more than
a couple of miles (kilometers) at low speeds in the three hour period
before the tire pressure is measured or adjusted.
Curb weight
means the weight of a motor vehicle with standard equipment
including the maximum capacity of fuel, oil, and coolant, air condi­
tioning and additional weight of optional equipment.
Extra load tire
means a tire design to operate at higher loads and at higher infla ­
tion pressures than the corresponding standard tire. Extra load tires
may be identified as
"XL", "xi", "EXTRA LOAD", or "RF" on the side ­
wall.
Gross Axle Weight Rating
("GAWR")
means the load-carrying capacity of a single axle system, measured
at the tire -ground interfaces.
Gross Vehicle Weight Rating
( " GVWR")
means the maximum total loaded weight of the vehicle.
Vehicle care

1119...__T_ ir_e _ s_ a_ n
_ d_ w_ h_ e_ e_ls _________________________________________________ _
Incorrect wheel alignment
Incorrect wheel alignment can cause excess ive tire wea r, impairi ng
the safety of the vehic le. If tires show excessive wear, have the
whee l alignment c hecked by an au th o rize d Audi deale r or qualifie d
wo rkshop.
All Wheel Drive
Vehicles with quattro® must always have tires of the same size, construc tion and tread type. F or details see
~ p age 273 .
& WARNING
Sudden tire failure can lead to los s of control, a crash and serious
personal injury !
• Never drive a vehicle when the tread on any tire is worn down
to the wear indi cators .
• 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 chemicals that can cause tire damage , such as
grease, oil , gasoline and brake fluid aw ay 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 speed s.
• Never mount used tires on your vehicle if you are not sure of
their "previous history." Old used tires may have been damaged
even though the damage cannot be seen that can lead to sudden
tire failure and los s of veh icle control. •
New tires and replacing tires and wheels
N ew t ires and wheels h ave t o be broke n in.
Fig . 2 76 T ir e specification code s on the sidewall of a tire
No .
G)
0
©
©
©
©
Description
Passenger car tire (where applicable)
Nominal width of tire in millimeters
Ratio of height to width (aspect ratio)
Radial
Rim diameter code
L o ad in dex and s peed rat ing

Tires a nd wh eels -
----------------
•
0
©
U.S. DOT tire identification number
Sever snow cond itions
Ti re ply composition and materials used
Maximum load rating
Treadwear, traction and temperature grades
@ Maximum permissible inflation pressure
The tires and rims are essentia l parts of the vehicle 's design. The
tires and rims approved by Audi are special ly matched to the char­
acteristics of the vehic le and can make a major contribution to good
road hold ing and safe handling when in good cond ition and prop­
erly inf lated
=> .&, .
We recommend tha t all work on tires and wheels be performed by
an authorized Audi dea ler . They are familiar with recommended
procedures and have the necessary special too ls and spare parts as
we ll as the proper facilities for disposing of the old tires.
Authori zed Audi dea lers have the necessary information about tech ­
n ical requirements for insta lling or changing tires and rims.
R ep lac ing t ires and wh eels
Tires shou ld be replaced at least in pairs and not individual ly (for
examp le both front tires or both rear tires together).
Be sure to read and heed the informat ion to the tire pressure mon i­
toring
system => page 338.
Always buy replacement radial tires t hat have the same specifica ­
tions as the tires approved for your vehicle by Audi. Rep lacement
tires must always have the same load rating specification as the
origina l equipment or approved optional t ires listed in the table
=> page 328.
Audi -approved specification tires are specially matched to your
vehicle and its load limits, and can contribute to the important road- holding, driving characteristics, and safety of the vehicle
. The table
(=> page 328) lists specificat ions of the tires approved for the Audi
models covered by your Owner's Literature .
The tire pressure labe l located either on driver's side 8 -pil lar or
ins ide the fuel fi ller
flap( => page 328, fig. 273) lists the specifica­
tions of the original equipment tires installed on your vehicle at the
t ime it was manufactured.
Federa l law requires tire manufacturers to place standardized infor ­
mation on the sidewa ll of all
tires => page 336, fig . 276. This informa ­
tion identifies and describes the fundamental characteristics, the quality grade of the tire and a lso provides a tire identification
number for sa fety standard cert ificat ion and in case of a recall.
T ire s pec ificat ion s
Knowledge of tire specifications makes it easier to choose the
correct tires . Radial tires have the tire specifications marked on the
sidewall, for example :
255/45 R 18 99 H
This contains the fo llowing information:
P Indicates the tire is for passenger cars (where applicable)
255 Nominal tire width in mm of the tire from sidewall edge to side -
wa ll edge. In general, the larger the number, the wider the tire
45 Height/width ratio in percent (aspect ratio)
R Tire construction: Radial
18 Rim diameter code (in inches)
99 Load rat ing code
H Speed rat ing letter code
XL (or "xi", "EXTRA LOAD" or "RF") indicates that the tire is a "Rein­
forced" or an "Extra Load" tire
M +S (or "M/S") Indicates tha t the tire has some mud and snow capa ­
bility
The tires could a lso have the information of direction of rotation
=> page 324.
Vehicle care

Tires and wheels 11111 --------------------------------------------
•
Wheel bolts
Wheel bolts must al wa ys be tightened to the correc t
tor que .
The design of wheel bo lts is matched to the factory installed rims. If
di fferent r ims a re fitted, t he co rrect w heel bo lts wi th the rig ht len gth
and correct ly shaped bolt heads m ust be used. This ensures that
w he els a re fitt ed se cu rel y and that t he bra ke syste m functi on s
correctly.
In certa in ci rc ums ta nces, yo u may no t use wheel bo lts fr om a
differ ent vehicle - eve n if it is the sa me
model=:> page 382.
& WARNING
Improperly tightened or maintained wheel bolts can become loose
causing loss of control, a collision and serious personal injury.
• Always keep the wheel bolts and the threads in the wheel hubs
clean so the wheel bolts can turn easily and be properly tightened .
• Never grease or oil the wheel bolts and the threads in the wheel
hubs. They can become loose while driving if greased or oiled,
even if tightened to the specified torque .
• Only use wheel bolts that belong to the rim being installed .
• Never use different wheels bolts on your vehicle.
• Always maintain the correct tightening torque for the wheel
bolts to reduce the risk of a wheel loss .
If the tightening torque of
the wheel bolts is too low, they can loosen and come out when the
vehicle is moving . If the tightening torque is too high, the wheel
bolts and threads can be damaged and the wheel can become
loose .
0 Note
The specified torque for the wheel bo lts is 9 0 ft lb (12 0 N m) with a
t olerance o f± 7,4 ft lb(± 10 Nm). T orque whee l bolts diago nally.
After changing a whee l, the torque must be checked as soon as possible with a torque wrench
-preferably by an authorized Audi
dea ler o r qua lif ied wo rksho p.•
Low aspect ratio tires
You r Aud i is fact ory- eq uip pe d w it h lo w aspect rati o tire s. T hese tir es
hav e been thorough ly t ested and been se lect ed specifical ly for your
mod el for thei r supe rb pe rf or manc e, r oad f eel an d ha nd ling under
a variety of driving conditions. As k your authorized Audi d ealer for
m or e de tails.
The low aspect rat io o f th ese t ires is indicat ed by a nume ra l of 55 or
less in the tire's size designatio n. The numeral represents the ratio
o f t he tir e's s idewa ll he ig ht in r ela ti on to it s tread w idt h ex pressed
in percentage . Conventiona l tires have a height/width ratio of 60 or
more.
The performan ce of low -aspe ct-ratio tires is particularly sensitive to
improper inflation pressure . It is therefore important that low
aspect ratio tires are inflated to the specified pressure and that the
inflation pressure is regularly checked and maintained . Tire pres­
sures should be checked at least once a month and alway s before a
long
trip :::::, page 331, "Checking tire pressure" .
What you can do to avoid tire and rim damage L ow a spect ratio tires can be damaged mo re easily by impact with
pot ho les, cu rbs, gull ies o r ridge s o n th e road, part icular ly if th e tire
is underinf lated .
I n or der to mini mize th e occurren ce of i mpac t da mag e to the tires
of your vehicle, we recommend that you observe the fol lowing
pr ecaut ions :
• Alwa ys m aint ain recom mended inflatio n pressu res . C he ck you r
t ire p res su re eve ry 2,000 mi les (3, 000 k m) and add ai r if neces sary .
• D rive carefully on roads with potho les, deep gullies or ridges .
The impac t from d riving th rough or ove r such o bstacles can
da mage you r tir es . Imp act with a curb may a lso caus e damage to
your tire s. .,_
Vehicle care

_____________________________________________________ D_a_ t_ a __ llJIII
App lies to veh ic les: w it h 12-cy linder eng ine and a ll whee l dr ive, lon g wheel base (LW B)
450 hp, 12-cylinder engine, with all wheel drive, long wheel base
En gin e data
Maximum output SAE net
Maximum torque SAE net
No. of cy linders
Displacement
Stroke Bore
Compression ratio Fuel
Dim ension s (appro x.)
Lengt h (wi th lice nce p late bracket)
Width (ac ross mirrors)
Height (unloaded)
Turning circle diameter (curb to cu rb)
Ca pac itie s (a pprox.>
Fuel tank
-Total capac ity
-Reserve (of total capacity)
Windshield and headlight washer fluid container
Engine oil
with fi lte r change hp@rpm
lb-ft@ rpm
CID (cm
3l
in (mm)
in (mm) 450@ 6200
428 @ 4000-4700
12 cy linder
366 (5998)
3 .55 (90 .2)
3 .3 1 (84 .0)
1 1.0 : 1
Premium unleaded (91 AKI! Recommended for maximum engine performance . Fur ­
t her
de tails => page 301, "Gasoline"
i n ( mm)
in (mm)
in (mm)
ft. (ml 20
4.4 (5192)
79.8 (2028)
57 .3 (1455)
41.7 (12 .7)
gal (liters)
gal (liters)
quarts (liters)
quarts (liters ) 2
3 .8 (90 .0)
2 .4 (9 .0)
5.1 ( 4.8)
13 .2 (1 2 .5)
•
Controls and equip­
ment Safety first 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 __ llll
Rear light
Defe ctive ....... .... .... .......... 26
Rear seat Contro ls ... .. .... .... ... .... .... . 97
Easy entry . . . . . . . . . . . . . . . . . . . . . . . 100
Head restraint adjustment . ......... 99
Lumbar support .. ... .... .... ... 96, 99
Massage function ......... ...... .. 98
Seat adjustment . ...... .... .... ... 98
Setting in the MMI ..... .. .... .... . 100
Rear view
See Rear -v iew cam era .... .... .... . 170
Rear w indow def ogger ...... .... .... . 12 4
Rear window shelf ... .... ...... .... .. 97
Rear -view camera . ....... ... .... 1 70, 173
Parking mode 1 ....... ... .... .... 175
Parkingmode2 ... .... ... .... .... 176
Red sym bols . ...... .... .... ... .... .. 30
Refuelling .. ... .... .... .... ......... 303
Re lease leve r for hood . ...... .... .... 306
Remote control . .... .... .... ... .... .. 48
Unlock ing and locking . ...... .... .. 51
Remo te con trol garage door opener
(Homelink®) . ....... ... .... .... 1 91
Remo te rear lid release . ....... .... ... 55
Repair manuals ... .. .... .... ... .... . 380
Repa irs
Airbag system . ....... ... .... .... 232
Replacing Wheel rims .. .. .. ...... .... .... .. 338
Replacing a fuse . ...... .... .... .... . 358
Rep lacing light bulbs .... .... ...... .. 362
Controls and equip­
ment Safety first
Replacing tires and wheels
......... .. 337
Report ing Safety Defects ... .. .... 207, 208
Reset button ..... .. ...... .... .... ... 14
Retractor .. ... ... .. ...... .... .... .. 213
Ri ms
Cast alloy .. ...... .... .... ... .... 293
Replaci ng .. ...... .... ... .... .... 338
Roof rack .. .... .... ...... .... ... .. . 103
L oading .. ... .... ... .... .... .... . 104
Mounting locat ions ... .... ........ 104
Roof w eight .... .... ...... .... ... .. . 10 4
s
SA FE ...... .... ....... .... .... .... .. 14
Sa fe driving hab its ...... .... .... .... 1 98
Safe ty bel t height adjustment ... .. .... 2 16
Safety belt position ... .... .... .... ... 214
Saf ety belt h eight adjustm ent .. ... . 216
Saf ety bel ts worn by pr egnan t wom en ..
215
Safety bel t pretensioner .. ...... .... .. 216
Service and disposal . ....... ... .. . 217
Safety belt warning light ... .. .... . 20, 209
Safety belts . .... .... .... .... .... ... 213
clean ing ... .. .... .... .... .... ... 299
Danger t o passengers who do no t wear a
safety belt ... .... .... .... ... ... 211
Fastening .... ...... .... .... .... . 213
I mp roper ly worn . .......... .... .. 216
Not worn . .... ...... .... ... .... .. 211
Sa fety belt position ... .... .... .... 214
Sa fety instruc tions ... .. .... ... .... 212 Securing child safety seats
....... .. 2 53
Specia l considerations for pregnant
wome n ...... .... ... .... .... ... 215
U nfastening ...... .... .. . .... .. .. 215
Warning /ind icator light .... .... .... 209
Why YOU MUST wear them . .... ... 209
Worn properly ...... .. ...... .... . 212
Safety co mpliance st icke r .... .... .... 374
Safety equipment ..... .. .... .... .... 198
Safety features for occ upant rest raint and
protection .. .... .... .... .... ... . 198
Safety guide lines
S eat adjustment .. .. .. .... .... ..... 86
Safety instruct ions
Engine compartment ...... .... ... . 307
for a booster seat ...... ... .... .... 251
for side curtain airbags .. ..... ... .. 241
for using a convertible chi ld sa fety seat .
2 49
f or us ing an in fan t seat . ....... .... 248
f or using chi ld safety seats ....... .. 246
f or us ing sa fe ty bel ts .. .... .... .... 212
Monitoring the Advanced Airbag System 231
Safety lock Ignit ion key, automatic transmission 130
Seat adjustmen t
Adj usting the sea tback ... .. ..... .. . 89
Driver 's seat ...... .... .... .... .... 86
Driver 's seat memory ...... .... .... . 94
Front passenger's seat .... .... .... . 87
Front seats ... .... .... ... .... .... . 86
Head restraints .... .... ... .... . 91, 203
Lumbar suppor t .. .... .... .... ... .. 90
Vehicle operation Vehicle care Do-it-yourself service Technical data