~ Press the key ¢ fig. 88 -the en gine will
start.
Switching the ignition on /off
If you wou ld like to switch the ignition on
without starting the engine, follow these
steps :
~ Insert the key into the ignition lock .
~ Press the key b riefly wi thout p ress ing the
brake pedal.
~ T o switch the ignition off, press the key
again .
When starting the engine, major e lectr ica l
l oads are switched off temporarily .
You can only remove the key w ith the ignition
sw itched off.
If the engine should not start immediately,
the starting process is automatically stopped
after a short time . Repeat sta rting procedure .
A WARNING
-Never allow the engine to ru n in confined
spaces -dange r of asphyxiation .
- Never remove the ignition key from the
ignition look whi le the vehicle is movi ng.
Otherw ise, the stee ring lo ck cou ld sud
denly engage and you would not be ab le
to steer the vehicle .
- Always ta ke the key with you wheneve r
yo u leave yo ur vehicle . Otherwise, the
engine could be started or e lectrica l
equipment such as the power windows
cou ld be operated. This can lead to seri
ous injury.
- Never leave ch ildren or persons requiring
assistance unattended in the vehicle. The
doo rs can be locked using the remote
transmitter, preventing people from es
caping from the vehicle on their own in
the event of an eme rgency . Depend ing
on the t ime of year, people inside the ve
hicle c an be exposed to very h igh or ve ry
low temperatures.
On th e ro ad 75
@ Note
Avoid high engine rpm, fu ll throttle and
heavy engine loads until the engine has
reached operating temperat ure -other
wise you r isk eng ine damage.
@ For the sake of the environment
Do not let the eng ine run w hile pa rked to
warm up. Begin dr iv ing immediately . Th is
reduces unnecessary emissions.
(D Tips
- If the key cannot be removed from the
ignition lock, you have to pull the me
chanical key out of the master key in or
der to be able to lock the vehicle
¢ page 34 .
-After starting a cold e ngine, there may
be a brief period of increased no ise be
cause the oil p ress ure must fi rst bu ild up
in the hydraulic va lve ad justers. This is
normal and not a cause for concer n.
- If you leave the veh icle w ith the ignition
switched on, the ig nitio n w ill switch off
afte r a cer tain per iod of t ime . Please
note that ele ctrical eq uipment such as
exterior lights will switch off as well
w hen that happens .
76 On the road
Starting the vehicle with the emergency
key
Applies to vehicles: with ig ni tion lock
You can use the emergency key as an ignition
key in on emergency.
Fi g. 89 Glove compar tme nt: Adapter for emergency
key
Fig. 90 Inse rt emergency key into the adapter
.. Take the adapter for the emerge ncy key out
of the glove compartment
c!> fig . 89 .
.. Push the emergency key c::> fig. 90 fully into
the adap ter . Make sure tha t the Aud i rings
are facing up.
.. Press the emergency key in the adapter
down until it latches audibly .
.. Inse rt the adapte r with the emergency key
forward into the ignit ion switch. The engine
can now be started as usual.
Stopping the engine
App lies to vehicles: with ig n ition lock
.. Bring the vehicle to a full stop .
.. Automatic transmission: Move the selector
lever to the P or N pos ition .
.. Press on the ignition key. The engine is
t ur ned off.
.. You can now remove the key.
Steering lock
T he s teeri ng locks when yo u remove the igni
t ion key. The locked steering helps prevent
ve
hicle theft .
Emergency off
If it is necessary in unu sual circumstan ces, the
engine can be switched off while the veh icle is
moving. The eng ine will be switched off if you
press on the key for an extended period .
A WARNING ~
-Never turn off the engine before the ve
hicle has come to a comp lete stop. T he
fu ll function of the brake booster and the
power steering is not guaranteed. You
must use more force to turn or brake if
necessa ry. Beca use you cannot steer and
brake as you usually wou ld, this could
lead to crashes and ser io us injuries.
- For safety reasons, you sho uld a lways
park your vehi cle with the sele ctor lever
in P. O therwise, the vehicle could in ad
ver ten tly roll away.
- The radiator fan can continue to run fo r
up to 1 0 minu tes
even after you have
t urned off the engine and removed the
ignit ion key. The radiator fan can a lso
turn on agai n if the engine coo lant heats
up because o f intense sunlight or heat
bu ild-up in the engine compartment.
- Always take the key with you whenever
you leave your ve hicle. Otherw ise, the
engine could be sta rted or electrical
equ ipment such as the power windows
could be operated. This can lead to seri
ous injury.
- Never leave childre n or persons requiring
assistance unattended in t he vehicle . The
doors can be locked using the remote
trans mitte r, preven ting people from es
c a ping from t he ve hicle on the ir own in
the event of a n emergency . Depe nding
on the time of year, peop le inside the
ve
h icle can be exposed to very high or very
low temperatures .
CD Note
If the engine has been under heavy load
for an extended period, heat builds up in
the engine compartment after the engine
is switched off- there is a risk of damaging
the engine . Allow the engine to run at idle
for about two minutes before switching it off.
Convenience key
Starting the engine
Applies to vehicles: with convenience key
The I START ENGINE S TOPI button switches
the ignition on and starts the engine.
Fig. 91 Ce nter console : S TART ENGINE STOP button
Starting the engine
.. Step on the brake pedal and move the selec
tor lever to P or N
c::> ,&..
.. Press On the ,..,I s=T"" A--=R=T =-= E~N::;:.,=G-;-,I N:-:--;:::E--;:S:-:;T:--;:O:;--;:P::il button
c::>fig. 91 -the engine w ill start.
Switching the ignition on/off
If you would like to switch the ignition on
without starting the engine, follow these
steps:
.. Press the
!S TART ENGINE STOPI button
without pressing the brake pedal.
.. To switch the ignition off, press the button
again.
If the engine should not start immediately,
the starting process is automatically stopped
after a short time . Repeat starting procedure.
When starting the engine, major electrical
loads are switched off temporarily.
On the road 77
After a cold engine is started, there may be a
brief period of increased noise because oil
pressure must first build up in the hydraulic
valve adjusters. This is normal and not a cause
for concern .
A WARNING
-Never allow the engine to run in confined
spaces - danger of asphyxiation.
- Never turn off the engine until the vehi
cle has come to a complete stop.
- Always take the key with you whenever
you leave your vehicle. Otherwise, the
engine could be started or electrical
equipment such as the power windows
could be operated. This can lead to seri
ous injury.
- Never leave children or persons requ iring
assistance unattended in the vehicle. The
doors can be locked using the remote
transmitter, preventing people from es
caping from the veh icle on their own in
the event of an emergency . Depending
on the time of year, people inside the ve
hicle can be exposed to very high or very
low temperatures.
CD Note
- Avoid high engine rpm, full throttle and
heavy engine loads until the eng ine has
reached operating temperature - other
w ise you risk engine damage.
@ For the sake of the environment
Do not let the engine run while parked to
warm up. Begin driving immediately. This
reduces unnecessary emissions .
(!} Tips
-After starting a cold engine, there may
be a brief period of increased noise be
cause the oil pressure must first bu ild up
in the hydraulic valve adjusters. This is
normal and not a cause for concern .
- If you leave the veh icle with the ignition
switched on, the ign it ion w ill switch off
after a certain period of time . Please ..,.
78 On the road
note that e lectrica l equipment such as
exterior lights wi ll switch off as well
when that happens .
Switching engine off
Applies to vehicles: with conven ience key
._ Bring your vehicle to a complete stop.
._ Move the selector lever to the P or N pos i
t ion .
._ Press the
I START ENGINE STOPI button
9 page 77, fig. 91.
Steering lock
The steering locks when you turn the engine
off us ing the
I STAR T ENGINE STOP I button
and open the dr iver's door. The locked steer
i ng helps prevent vehicle theft .
Emergency off
If necessary, the engine can be sw itched off
with the selector lever in the R or D/S pos i
tions. To do so, step on the brake pedal and
press and hold the
I START ENGINE STOP I but
ton vehicle speed must be less than 6 mph (10 km/h).
_& WARNING
- N ever turn off the eng ine before the ve
hicle has come to a comple te stop . The
f ull function o f the brake booster and the
powe r steering is not guara nteed . You
must use more force to turn or brake if
necessary. Because you cannot steer and
brake as you usually would, this could
lead to crashes and serious injur ies.
- For safety reasons, you should always
park your vehicle with the se lector lever
in P. Otherwise, the ve hicle could inad
vertent ly roll away.
-The rad iator fan can continue to ru n for
up to 10 m inutes even afte r yo u have
tu rned off the eng in e and removed the
ignition key. The radiator fa n can also
t u rn on again i f th e e ngine cool ant hea ts
up because of intense sunlight or hea t
build -up in the engine compartment. -
Always take the key with you whenever
you leave your veh icle. Otherw ise, the
engine could be started or electrical
equ ipment such as the power windows
could be ope rated. This can lead to seri
ous injury.
(D Note
If the engine has been under heavy load
for an extended period, heat bu ilds up in
the e ngine compartment after the eng ine
i s sw itched off - there is a r isk of damag ing
the engine. Allow the engine to run at id le
fo r about two minutes before switching it
off.
Driver messages
Ignition i s on
This message appears and a warning tone
sounds if you open the driver's door when the
ignition is sw itched on.
No key ident ified
This message appears when the
I S TART ENGINE STOPI button is pressed if
t h ere is no master key ins ide the ve hicle or if
the system does not recognize it. For exam
ple, the master key cannot be recognized if it
i s covered by an object (e.g . al uminum brief
case) which
screens the radio s ignal. Electron
i c dev ices such as cell phones can also i nte r
f ere with the radio s ignal.
Pres s bra ke p edal to start engine
This message appears if you do not press the
brake pedal to start the eng ine .
Shift to N or P to start engine
Th is mess age appears w hen at tempt ing to
sta rt the eng ine if the selecto r lever for the
automatic transmission is not in the P or N
pos ition . The engine can only be started with
the selecto r in these positions.
Is the key in the vehicle ?
This message appears if the master key is re
moved from the vehicle with the engine run
n ing.
If the master key is no longer in the ve
hicle, you cannot switch on the ignition after
stopping the engine and you also cannot start
the engine again . Moreover, you cannot lock
the vehicle from the outside w ith the key.
Shift to P otherwise vehicle can roll away.
Doors do not lock if lever is not in P.
This message appears for safety reasons
along w ith a warning signa l. It appears if the
selector lever for the automat ic transm ission
is not in the P position when switch ing off the
ignition. Move the selector lever to the P posi
tion, otherw ise the veh icle is not secured
against rolling away . You also cannot lock the
veh icle using the locking button* on the door
handle or using the remote key.
Convenience key defective! Use ignition lock
This message appears if the engine must be
started or stopped using the ignition key and
not the
I STAR T ENGIN E STOP ! button .
Electromechanical
parking brake
Operation
The electromechanical parking brake replaces
the hand brake.
F ig. 92 Cen ter console: Pa rk ing brake
.. Pull on the switch @c> fig . 92 to apply the
parking brake. The indicator light in the
switch illum inates .
.. Step on the brake pedal or the acce le rator
pedal and press the switch at the same time
On the road 79
to release the parking brake. The indicator
light in the switch goes out .
Your vehicle is equipped wi th an electrome
chanical parking brake. The parking brake is
designed to prevent the vehicle from rolling
unintentionally and replaces the hand brake.
In addition to the normal functions of a tradi
tiona l hand brake, the electromec hanical
parking brake provides various convenience
and safety funct ions .
When starting from rest
-The integral start ing ass ist helps you when
driving by automatically releasi ng the park
ing brake
¢ page 80, Starting from rest.
-When starting on inclines, the starting as
sist prevents the vehicle from unintentiona l
ly rolling back. The braking force of the
parking brake is not re leased until sufficient
driving force has been bui lt up at the
wheels.
Emergency brake function
An emergency brake ensures that the veh icle
can be slowed down even if the
normal brakes
fail
c> page Bl, Emergency braking.
Indicator lights
- If the parking brake is closed with the ign i
t ion
switched on the . (USA models) /
• (Canada models) indicator lights come
on in the instrument cluster and the switch.
- If the parking brake is closed with the igni
tion
switched off the. (USA models) /
• (Canada models) indicator lights come
on in the instrument cluster and the switch
for about 20 seconds.
A WARNING
If a drive range is engaged with the vehicle
stationary and the engine runn ing, you
must in no instance accelerate carelessly .
Othe rwise the vehicle w ill start to move
imm ediately- risk of an accident.
80 On the road
(0 Note
If the . symbol i n the display or the
1111 (USA models) ;II (Canada mo dels)
ind icator light in the instr ument cluster
flashes, there is a malfunction in the brake
system. By press ing the
ISETI button, you
can br ing up a driver message which ex
p lains the malfunction in more detail. If
the dr ive r message
Parking brake! ap
pears, there is an operating malfunction in
t he par king brake which you should have
repaired immediately by an a uthorized
Aud i dea le r or other q ualified workshop
¢page 15.
@ Tips
-You can apply the pa rking brake at any
time - even with the ignition switched
off. The ignit ion must be t urned on in or
der to release the parking brake.
- Occas iona l noises when the parking
brake is applied and re leased are norma l
and are not a cause for concern.
- When the vehicle is parked, the parking
brake goes through a se lf-test cycle at
regular intervals. Any assoc iated noises
are normal.
Parking
Parking
> Press the brake pedal to stop the vehicle .
> Pull the button @¢page 79, fig . 92 to set
t h e pa rking brake.
> Move t he selec to r lever to P.
> Turn the eng ine off¢ A.
In addition on inclines and grad es
> Turn the steer ing whee l so that your vehicle
will ro ll against the curb in case it should
sta rt to move .
.&_ WARNING
-Whe n you leave your veh icle -even if on
ly briefly - a lways remove the ign ition
key . This applies part icu larly when chil
dren remain in t he vehicle . Otherwise the children could start the eng
ine, release
the park ing brake or operate electrical
equ ipment (e.g. power windows). There
is the risk of an acc ident.
- When the veh icle is locked, no one - par
ticularly not children should rema in in
the vehicle . Locked doors make it more
difficul t for emergency wo rke rs to get in
to the vehicle - putting lives at r isk.
Starting from rest
The starting assist function ensures that the
parking brake is released automatically upon starting.
Stopping and applying par king brake
> Pull the switch @¢ page 79, fig. 92 to ap-
ply the parking brake.
Sta rting and automatically relea sing the
parking b rake
> When you sta rt to dr ive as usual, the park
ing brake is automat ically released and your
veh icle beg ins to move.
When stopping at a traffic signal or stopping in city traffic on vehicles with an a utomatic
transmission, the parking brake can be ap
plied . The vehicle does not have to be held
with the footbrake . T he parking brake elimi
nates the tende ncy to creep w ith a dr ive range
engaged. As soo n as yo u drive
off as usu a l,
the parking bra ke is re leased automatically
and the vehicle starts to move .
Starting on slopes
When starting on inclines, the sta rting assist
preve nts t he veh icle from u nintent ionally roll
i ng back. The br aking for ce of the park ing
brake is no t re leased unt il suff icien t driving
f orce has been built up at the w heels.
(D Tips
Fo r saf ety reaso ns, the pa rking br ake is re
l eased a utom atically on ly when t he d riv
er's safety belt is engaged in the buckle.
A WARNING ,~
- Always pay attention to the traffic
around you whe n the cruise contr ol is in
o peration . You are always responsi ble for
your s peed and the distance between
yo ur vehicle and other vehicles.
- For reasons of safety, cruise contro l
should not be used in the city, in stop
and-go traff ic, on twisting roads and
when road conditions are poor (su ch as
ice, fog, grave l, heavy rain and hydro
planing) -risk of accident.
- T urn off the cru ise control tempo rar ily
when entering turn lanes, highway exit
lanes or in construction zones.
- Please note that inadvertent ly "rest ing"
yo ur foot on the accelerator peda l causes
the cruise control not to brake. Th is is
because the cr uise control is overridden
by the driver's acce lerat ion.
- If a brake system malfunction such as
overheat ing occurs when the cruise con
tro l system is sw itched on, the braking
function in the system may be switched
off. The other cruise control f unctions re
main active as long as the i nd icator light
lij jUJ~i4 (US models) lli,'I (Canad ian mod
els) is on.
(D Tips
The brake lights illuminate as soon as the
bra kes apply automat ica lly.
Changing speed
.,. To increase/dec rea se the speed in incre
ments, tap the lever in the
0 10 d irection
~ page 82, fig. 94.
.,. To increase/dec rease the speed quickly, hold
the lever in the
0 10 direction unti l the de
s ired speed is displayed.
You can also press the accelerato r peda l down
to increase your speed, e .g. if yo u want to
pass someone. The speed yo u saved earlier
will resume as soon as you let off of the accel
erator pedal.
On th e ro ad 83
If, however, you exceed yo ur saved speed by
6 mph (10 km/h) for longer than 5 minutes,
the cr uise contro l wi ll be t urned off tempora
rily. The green symbol in the disp lay t urns
white. The saved speed remains the same.
Presetting your speed
You can preset your desired speed while the
vehicle is not moving.
.,. Switch on the ignition.
.,. Pull lever into position
(D ¢ page 82,
fig . 94.
.,. Press the lever in the 0 or O direction to
increase or decrease your speed .
.,. Release the lever to save that speed .
This function makes it possib le, for examp le,
to save the speed you want before dr iving on
the highway. Once on the highway, act ivate
the cr uise control by pulling the leve r toward
(D .
Switching off
Temporary deactivat ion
.,. Press the b rake pedal, or
.,. Press the lever in to posi tion @(n ot clicked
into place)
¢ page 82, fig . 94, or
.,. Drive fo r longer than 5 min utes at more
than 6 mph (10 km/h) above the stored
speed.
Switching off completely
.,. Press lever into position @(clicked into
place), or
.,. Switch the ignit ion off .
T he speed you saved will be retai ned if the
c ruise control has been swi tched off tempora
rily. To resume the saved speed, let up on the
brake and p ull the lever to position
(D .
Swi tc hi ng the igni tion off e rases the saved
speed.
Transmission S tronic ®
Introduction
The automat ic transm iss ion is controlled elec
tronically. The transmiss ion ups hifts or down
shifts automatically depend ing on which drive
program is se lected.
When a
modera te driving sty le is used, the
tra nsmission se lec ts the most econom ica l
driving mode.
It w ill then change up early and
de lay the downshifts to g ive better f uel econ
omy .
The transmis sion swit ches to a sporty mode
after a k ick-down o r when the driver uses a
s porty dri ving sty le characterized by quick ac
celerator peda l movements, heavy accelera
tion, frequent changes in speed and traveling
at the maximum speed.
I f desired, the drive r can a lso se lect the gears
manually ( tiptronic mode ) ~ page 89.
The S tronic ® is a dual-clutch transmission.
P owe r is transfe rred using two clutches that
work independently from one anothe r. They
rep lace the torq ue converter used in conven
tional automatic transmiss ions and allow the
vehicle to accelerate without a noticeable in
terruption in traction.
Selector lever positions
F ig. 96 Display in the instrument cluster: se lector lever
in pos itio n P
The selector lever position engaged appears
n ext to the selector leve r as well as in the in
strument cluster display.
Tran sm iss ion 85
P -Park
In this se lector lever posi tion the transm is
s ion is mechanica lly locked. Engage P on ly
when the vehicle is
completely stopped~&.
in Driving the automatic transmission on
page 87.
T o shift in or out of pos it ion P, yo u must first
press and ho ld the brake pedal and then press
the re lease button in the selector leve r hand le
whi le moving the selector lever to or from P.
You can shift out of this position only with the ignition o n.
R - Reverse
Se lect R on ly when the veh icle is at a full stop
and t he engine is running at idle speed~.&. in
Driving the automatic transmission on
page 87.
Before you move the se lector lever to R, press
both the re lease button in the hand le o f the
selector lever
and the brake pedal at the same
time.
When the ignition is on, the backup lights illu
minate when the selecto r lever is moved into
R.
N -Neutral
The transmiss ion is in neu tral in this pos ition .
S hift to t his position fo r standing with the
brakes app lied
~ .&. in Driving the automatic
transmission on page 87.
When the vehicle is stat iona ry or a t speeds
below 1 mph (2 km/h), yo u must always app ly
the footbrake before and whi le mov ing the
l ever o ut of
N.
D/S - Normal posit ion for driving forward
In the D/S pos it ion, t he tr ansmission c an be
operated either in the norma l mode D or in
the sport mode S . To select the sport mode S,
pull the selector lever back briefly. P ulling the
l ever back again will se lect the norma l mode
D. The instr ument cluster disp lay shows the
selected driving mode. ..,_