166 Airbag system
How knee airbags work
Applies to vehicles: with knee airbags
The risk of injury to the leg area can be re
duced by fully inflated knee airbags.
Fig. 162 Inflated airbags protecting in a frontal colli·
s io n
The knee airbag system has been designed so
that the a irbags for the driver and front pas
senger deploy in certain but not all frontal
collisions.
If the front airbags deploy, the knee airbags
a lso deploy in frontal collisions when the de
ployment threshold stored in the control unit
is met .
When the system deploys, the airbags fill
with a propellant gas, and inflate between the
lower part of the instrument panel and the
driver and the lower part of the instrument
panel and the front passenger
Q page 157,
fig . 159.
Although they are not a soft pillow, they can
"cush ion" the impact and in this way they can
help to reduce the risk of injury to the lower
extremities.
All of this takes place in the blink of an eye, so
fast that many people don't even realize that
the airbags have deployed . The airbags also
inflate with a great deal of force and it is im
portant for occupant safety that nothing
should be in their way when they deploy.
Fully inflated airbags in combination with
properly worn safety belts slow down and lim
it the occupant's forward movement and help
to reduce the risk of injury. Important safety instructions on the
knee airbag system
Applies
to vehicles: with knee airbags
Airbags are only supplemental restraints. Al
ways wear safety belts correctly and ride in a
proper seating position .
There is a lot that you and your passengers
must know and do to help the safety belts and
airbags to provide supplemental protection.
A WARNING
-An inflating knee airbag can cause serious injury. Wearing safety belts incorrectly and
improper seating positions increase the
risk of serious personal injury and death
whenever a vehicle is being used.
- The knee airbag system cannot protect
you properly if you are seated too close
to any of the airbag locations. When ad
justing their seat positions, it is impor
tant that both the driver and the front passenger keep their upper bodies and
knees at the following minimum safe
distances:
- at least 10 inches (25 cm) between the
chest and the steering wheel/instru
ment panel.
- at least 4 inches (10 cm) between the knees and the lower part of the instru
ment panel.
- The risk of personal injury increases if
you lean forward or to the side, or if the
seat is improperly positioned and you are
not wearing your safety belt . The risk in
creases even more should the airbag de
ploy .
- Always make sure that the knee airbag
can inflate without interference. Objects
between you and the airbag can increase
the risk of injury in an accident by inter
fering with the way the airbag deploys or
by being pushed into you as the airbag
deploys.
- Never let anybody, especially children
or animals ride in the footwell in front
-Always read and heed a ll WARNINGS
whenever using a child restraint in ave
h icle
¢ page 138, Safety belts,
¢ page 147, Airbag system and
¢ page 173, Important things to
know.
(D Tips
Always replace child restraints that were
installed in a vehicle during a crash. Dam
age to a child rest raint that is not vis ible
could cause it to fail in another collis ion
situation.
Advanced front airbag system and children
Your vehicle is eq uipped with a front "Ad
vanced Airbag System" in compliance w ith
United States Federal Motor Vehicle Safety
Standard (FMVSS) 208 as applicable at the
time your veh icle was manufactured .
T he Advanced Airbag system in your vehicle
has been certified to meet the "low-risk" re
qu irements for 3-and 6-year old ch ildren on
the passenger s ide and small adults o n the
driver side. The low risk deployment criter ia
a re i ntended to reduce the risk of inju ry
through interaction with the a irbag that can
oc cu r, fo r example , by be ing too close to the
steering whee l and instrument panel when
the airbag inflates . In addition, the system
has been certified to comply with the "sup
press ion" requirements of the Safety Stand
ard, to turn off the front airbag for infants up
to 12 months who are restra ined on the front
passenger seat in ch ild restraints that are list
ed i n the Standard .
Even though your vehicle is equipped with an
Advanced Airbag system, all chi ldren, espe
cially those 12 years and younger, shou ld al
ways ride in t he back seat properly rest ra ined
fo r the ir age and s ize. Th e a irbag on t he pas
senger side makes the fro nt seat a poten tially
d a ngerous pla ce for a child to ride. The front
seat is not the safest place fo r a child in a fo r
ward-facing child safety seat . It can be a very
Child Sa fet y 175
dange rous place fo r an infant o r a larger child
in a rearward-facing seat.
T he veh icle's Advan ced Ai rb ag Sys tem has a
capacit ive passenger detec tion system in the
front passenger seat cush ion that can detect
the presence of a baby or a c hild in a child re
stra int system on this seat .
T he capaci tive passenge r detection system
r egisters the changes that result in an electri
ca l fie ld when a chi ld, a ch ild restraint, and a
baby blanket are on the front passenger seat .
The change in the measured capac itance due
to the presence of a child, a child restraint,
and a baby blanket on the front passenger
seat is related to the ch ild restraint system
rest ing on the seat . The meas ured capacitance
of a child res traint system va ries depend ing
o n the type of sys tem and specific m ake and
model.
T he elect rical capac itance of the va rious
types, ma kes, a nd models of child restra ints
spe cified by the U.S. Nationa l Highway Traff ic
Safety Administra tion (N HTSA) in the re levant
sa fety standard are stored in the Advanced
Airbag System contro l unit together with the
capacitances typical of infants and a 1-year
o ld child. W hen a child restraint is used on t he
front passenger seat with a typica l 1 year-old
infant, t he Advanced Airbag System compares
the capacitance measu red by the capacitive
passenger detection system with the data
s tored in the ele ctronic co ntrol unit.
Child restraints and Advanced front
airbag system
Rega rdless of the c hild restraint that you use,
make sure that it has been certified to meet
U nited States Federal Motor Vehicle Safety
Standards and has been certified by its manu
facturer for use with an airbag. A lways be sure
that the c hild restra int is properly installed at
o ne of the rear seating positions. If in excep
t iona l circumsta nces yo u must use it on the
fron t passenger sea t, ca re fully read all of the
i nformation on child sa fe ty and Advanced Air -
bags and heed all of the applicable ..,.
•
•
220 Fuel supply and filling your fuel tank
Fuel filler flap emergency release
You can open the fuel filler flap by hand if the
power locking system should fail .
Fig. 181 Luggage co m partmen t: open ing the side tr im
Fig. 182 Right side trim panel in the lu ggage compar t
ment: e mergency release mechanism
Opening the side trim
• To remove the right side trim, first remove
the retainer from the mounts
¢ fig. 181.
• Turn both locking mechanisms 90° to the
left using a coin or a similar object and re
move the locking mechanisms.
• Tilt the retainer upward and pull the trim
out . Lay the trim down on its side, because
there is an electrical wire on the back.
Fuel filler door emergency release
The emergency release mechanism is located
behind the right side trim panel in the lug
gage compartment.
• Loosen the loop i:>
fig. 182 from the retainer
and then pull on the loop carefully i:>Q).
• Press on the left side of the fuel filler door
to open
i=> page 218, fig. 179.
(D Note
Only pull on the loop until you feel resist
ance. You will not hear it release . Other- wise you could
damage the emergency re
l ease mechanism .
Selective catalytic
reduction
General information
Applies to vehicles: with diesel engine
On vehicles with selective cata lytic reduction,
an urea solution (Ad B lue) is injected into the
exhaust system before a nitrogen oxide cata
lytic converter to reduce nitrogen emissions.
The Ad Blue is stored in a separate tank in the
vehicle. The Ad Blue usage accounts for ap
proximately 0.5% to 1.2% of the diesel fuel
that is used.
You must refill the Ad Blue or have it refilled
by you r authorized Audi dea ler or qualified
workshop as soon as the Ad Blue refill mes
sage appears in the instrument cluster
¢page 222.
A WARNING
-Failure to heed AdBlue refill information in
the instrument cluster can prevent the ve
hicle from be ing started and driven . If the
vehicle cannot be driven and an emergency
arises, personal injury can occur.
- Always have the AdBlue tank refilled well
before the tank runs dry.
(D Tips
-The instrument cluster display ind icates
the distance remaining that can be driv
en
c> page 221. If the Ad Blue tank is
completely empty, the engine will not
start again after the ignition is switched
off.
-Ad Blue is required by law to operate this
vehicle.
224 Checking and filling
Checking and filling Engine hood
Releasing the engine hood
The engine hood is released from inside the
vehicle .
Fig. 186 Driver foo twell: release lever
Fig. 187 Rocker switch un der the hood
Make sure the wiper arms are not raised up
from the windshield. Otherwise the paint
could be damaged .
.,. Pull the lever under the instrument panel in
the direction of the arrow
¢ fig. 186.
.,. Raise the hood slightly¢,&. .
... Press the rocker switch under the hood up
ward
~ fig. 187. This releases the catch.
• Open the hood.
&_ WARNING
Hot engine coolant can burn you.
- To reduce the risk of being burned,
never
open the hood if you see or hear steam
or coolant escaping from the engine compartment . Wait until no steam or
coolant can be seen or heard before care
fully opening the hood .
'Working in the engine compartment
Be especially careful whenever you work in
the engine compartment.
Whenever you must perform any work in the
engine compartment, for example checking
and filling different fluids, there is a risk of injury, burns and accidents. To prevent per
sonal injury always observe the following
WARNINGS. The engine compartment of any
vehicle is a hazardous area
¢ ,&. .
A WARNING
To help avoid injury, before you check any
thing under the hood:
- Turn off the engine.
- Switch off the ignition .
- Apply the parking brake.
- Move selector lever to P (Park).
- Always let the engine cool down. Hot
components will burn skin on contact.
- To reduce the risk of being burned, never
open the hood if you see or hear steam
or coolant escaping from the engine
compartment. Wait until no steam or
coolant can be seen or heard before care
fully opening the hood.
- Keep children away from the engine com
partment.
- Never spill fluids on hot engine compo
nents . They can cause a fire .
- Never touch the radiator fan. The auxili
ary electric fan is temperature controlled
and can switch on suddenly .
- Never open the coolant reservoir cap
when the engine is still warm . The cool
ant system is pressurized and hot cool
ant could spray out.
- Protect your face, hands and arm from
steam or hot engine coolant by placing a
thick rag over the cap when you open the
coolant reservoir.
- Do not
remove the engine cover under
any circumstances. This increases the
risk of burns.
- If work on the fuel system or the electri
cal system is necessary:
No. Equ ipment Amps
4 Suspension control system sen-s sor
s
E
lectronic Stabilization Cont rol
s (ESC) module
6 Climate control
5
7 Adaptive cruise control 10
8
Airbag control module, front
5
passenger 's seat sensor system
9 Gateway 5
Homelink (garage doo r opener),
10 night vis ion system cont ro l 5
module
11 Image
process ing (act ive lane
10
ass ist, adaptive cruise control)
12 Dynamic steering 5
13 Terminal 15 in
the instrument
15
panel
14 Terminal 15 in
the luggage com-
partment 30
15 Terminal 15 (eng
ine)
15
16 Starter 40
Fuse p anel ® (brown )
No . Equipment Amps
1 Gateway
5
2 C limate control 10
3 E
lectronic Stabili zation Contro l
10
(ESC) module
4 Fron
t door (driver 's side)
30
s
Power seat adjustment (driver's
7,5
seat)
6 Dynam
ic steering
35
7 Su nroof 20
8
Rear door control module (driv-
15
er 's side)
9 Lumbar support (
Front passen-
s ger seat)
10 Tire
pressure monitoring system
5
11 Su
nroof, rear spoi ler (Sport ba ck )
20
12 Driver door
control module
15
Fuse s and bulb s 2 71
Fuse panel © (red )
No . Equipment
2 Fuel pump
3 Brake lig
ht sensor/brake pedal
sensor system
AdBlue control module (Diesel)/
4 Engine acoustics
5 Left rear door cont rol modu le
6 Power seat adjustment
(pas-
senge r's seat)
7 Horn
8 Windshield wiper motor
9 Light/rain sensor, heater
for vid-
eo camera in windscreen
10 L umba r suppo rt (dr iver seat)
1 1 Front
passenger door control
modu le
1 2 Right rea r door cont rol mod ule
Front passenger side cockpit fuse
assignment Amp
s
25
5/5
5/7,S 30
7,5 15
30
s
5
15
15
F ig . 216 Front passenger side cockpit: f use panel w it h
plast ic brac ket
Fuse panel @ (blac k)
No . Equipment Amps
1 Head-up D
isplay
5
2 MMI Display 5
3 CO/DVD changer
5
4 MMI uni t/drives 7,5
5 Chip
card reader ( not in a ll coun -
5
tries)
6 Instrument
cluster
5
7 Steering col umn switch module 5 ...