Page 97 of 300

..... N
co ~ CX)
..... I.Cl U"I
..... I.Cl .....
Speed warning 1: setting a speed limit
Warning threshold 1 is set by the IS ET I button .
Fig. 107 SET butto n in t he inst rume nt cluster
Storing the maximum speed
.. Drive at the desired maximum speed.
.. Press the
ISE TI button in the instrument panel
display ¢fig .107for 1 second .
Resetting the maximum speed
.. Drive the vehicle at a speed of at least 3 mph
(5 km/h)
.. Press the
~ IS- ET~I button for more than 2 seconds .
The speed warning symbol. (USA models)/ .
(Canada models) will appear briefly in the d isp lay
when you release the
ISE TI button to indicate
that the maxim um speed has been sto red suc
cessfully.
The maximum speed rema ins stored until it is
changed by pressing the
I S ET I button aga in brief
l y o r until it is deleted by a lengthy p ush on the
button.
Speed warning 2: setting a speed limit
The MMI* or the radio control unit is used to set,
change or delete warning threshold
2.
.. Se lect: I CARI f u nct ion button > Instrum ent
clu ster > Sp eed warning .
Or
.. Se lect: ICARI funct ion but ton> C ar sys tem s*
contro l button > Dri ver a ssist > Speed warning.
Wa rning threshold 2 can be set in the speed
r ange sta rting from 20 mp h to 150 mph (30 km/
h t o 240 km/h) . Settings can each be ad justed i n
intervals of 5 mph ( 10 km/h) .
Drivi ng
Cruise control system
Switching on
The cruise control system makes it possible to
drive at a constant speed starting at 20 mph (30
km/h) .
0
f
~
0
Fig . 108 Co ntrol lever w it h push -b utton
F ig . 1 09 Disp la y: Se lected speed
.. Pull the lever to position ©¢ fig. 108 to
switch the system on.
.,. Dr ive at the speed to be controlled.
.. Press button @to set that speed.
The stored speed and the indicator light
g M 0 :i:
;A
..
~ a: .. m
@;\l)M4 (US model) !&I (Canadian mode l) appear
in the instrument cluster display
¢fig. 109 . The
display may vary, depending on the type of dis
play in your veh icle .
The speed is kept constant by modifying engine power or through an active brake intervention .
A WARNING
--
-Always pay attention to the traffic around
you when the cruise control is in operation .
You are always respons ible for your speed
a nd the distance between your veh icle and
o ther veh icles.
95
Page 98 of 300

Driving
-For reasons of safety, cruise control should
not be used in the city, in stop-and-go traf
fic, on twisting roads and when road condi
tions are poor (such as ice, fog, gravel, heavy rain and hydroplaning) -you could
have an accident.
- Switch the cruise control off temporarily when driving in turning lanes, highway exits
or in construction zones.
- Please note that unconsciously "resting"
your foot on the accelerator pedal causes cruise control not to brake . This is due to
the control system being overridden by the
driver's acceleration.
- Never use the cruise control when driving
off-road or on unpaved roads. The cruise
control is intended for use only when the ve
hicle is being operated on paved roads, and
is not suitable for use off-road or on un
paved roads.
- If a brake system malfunction such as over
heating occurs when the cruise control sys
tem is switched on, the braking function in
the system may be switched off. The other
cruise control functions remain active as
long as the indicator light
tii;(O~i4 (US mod
el)/lil (Canadian model) is on .
{D) Tips
The brake lights illuminate as soon as the
brakes apply automatically.
Changing speed
.,. To increase/decrease the speed in increments,
tap the lever in the
010 direction ¢ page 95,
fig. 108 .
.,. To increase/decrease the speed quickly, hold
the lever in the
010 direction until the de
sired speed is displayed.
You can also press the accelerator pedal down to
increase your speed, e.g. if you want to pass
someone. The speed you saved earlier will re
sume as soon as you let off of the accelerator
pedal.
If, however, you exceed your saved speed by
S mph
(10 km/h) for longer than 5 minutes, the
96
cruise control will be turned off temporarily. The
green symbol in the display turns white, the
saved speed is retained.
Pre-selecting speed
You can pre-select your desired speed while the
vehicle is not moving.
.,. Turn on the ignition.
.,. Pull lever into position
(D ¢page 95, fig. 108.
.,. Press the lever in the 0 or 0 direction to in-
crease or decrease your speed.
.,. Let go of the lever to save that speed .
This function makes it possible, for example, to
save the speed you want before driving on the
highway. Once on the highway, activate the
cruise control by pulling the lever toward
(D .
Switching off
Temporary deactivation
.,. Step on the brake pedal, or
.,. Press the lever into position @ (not clicked into
place) ¢
page 95, fig . 108, or
.,. Drive for longer than 5 minutes at more than
5 mph (10 km/h) above the stored speed.
Switching off completely
.,. Press lever into position @ (clicked into place),
or
.,. Switch the ignition off .
The speed you saved will be retained if the cruise control has been switched off temporarily . To re
sume the saved speed , let up on the brake and
pull the lever to position
(D.
The saved speed will be erased after turning the
ignition off.
A WARNING
You should only resume the saved speed if it
is not too high for existing traffic conditions.
Otherwise you risk an accident.
Page 99 of 300

,....,
N
co
er::
co
,....,
Hybrid
Hybrid drive
Introduction
Applies to vehicles: with hybrid drive
General informatio n
The hybrid drive is a combined drive concept that
automatically switches between combustion en
gine and electric drive types or combines them.
All work on high voltage systems is intended only
for high voltage technicians and may only be per
formed by authorized service facilit ies in accord
ance w ith Aud i regulations.
T he high voltage system is composed of the fol
lowing h igh voltage components: the high volt
age battery, the power electronics, the electric
motor, the high voltage A/C compressor and the
orange high voltage wir ing.
Hi gh vo ltag e b att e ry
The high voltage battery is located in the luggage
compartment underneath the cargo floor . You do
not need to perform any maintenance work on
the high voltage battery . Additional informat ion
about the h igh voltage battery can be fo und un
der
~ page 104 .
The high voltage battery service plug is also
found underneath an orange cover under the car
go floor. The serv ice plug is provided only for use
by service personnel and must not be
removed by
others who are not trained to use it.
A WARNING
-The voltage in the high voltage system is life
threatening . Touching a damaged high volt
age component can result in a fatal electric
shock. The components in the high voltage
system are marked with a warning label which
warns against the h igh voltage .
- Never perform work on orange high voltage
cables or on high voltage components . Only
authorized repair fac ilities that are certified
may perform work on the high voltage sys
tem .
Hyb ri d
-Never open or remove the service plug cover
in the center of the cargo floor .
- Never damage, alter or
remove the orange
high voltage cable or disconnect it from the
high voltage system .
- Aud i regulations must be followed during
all work performed on the high voltage sys
tem and high voltage components.
A WARNING ,-
While in electric drive mode, the vehicle pro-
duces considerably less idling, driving and op
erating noise than when the combust ion en
g ine is running . This may make it difficu lt or
i mpossible fo r others such as pedestrians and
chi ldren to hear and notice the vehicle when it
i s in elect rical drive mode. Th is can lead to
collisions and injuries, for example in low
traffic areas, when maneuvering or when driv
ing in
reverse.
A WARNING
--Never leave the vehicle unattended while in
the drive ready mode. The vehicle could begin moving if the accelerator pedal is pressed ,
even if the combustion engine is switched off .
This may cause coll is ions and severe or fatal
i njuries. When the vehicle enters dr ive ready
mode, the status message h~
.Jrid rca yap
pears br iefly in the instrument cluster display
and the needle in the power meter points to
READ Y ~page 98 .
-When exiting the vehicle, make sure these
lecto r lever is in the P position, the ignition
is switched off and the hybrid system is de-
activated.
(D Note
- The h igh vo ltage system can be damaged if
the vehicle underbody comes into contact
w ith the ground . Immediately drive your
ve
hicle to an authorized repair facility and
have it inspected.
- Do not transport fluids in open containers in
the luggage compartment. Spilled fluids
can seep underneath the cargo f loor. This
can damage the high voltage system.
97
Page 100 of 300

Hybrid
Starting the vehicle
Applies to vehicles: with hybrid drive
The vehicle is started and turned off either with
the ignition key~
page 84 or w it h the
I S T AR T ENG INE S TOPI button* ¢ page 87 in the
same way as a conven tional vehicle .
When start ing the veh icle, the needles in the in
s trumen t clus ter move upward briefly . When the
veh icle enters drive ready mode, the status mes
sage
hybrid ready appears briefly in the instru
ment cluster display and the needle in the power
meter points to
READ Y¢ page 98 .
Depending on the operation mode of the hybrid
system, there are two possible drive ready modes
after the vehicle has been started:
Driv e re ady mode with combustion engine
If the operat ing req uirements ¢page l00for
elec tric drive mode are n ot met, the combust ion
Power meter overview
Applies to vehicles: with hybrid drive
engine starts the vehicle as usual. You can start
driving as usual.
Drive ready mod e with the el ectric motor
If the operating requirements ¢ page 100 for
the e lec tric dr ive mode are met, the comb ustion
engine rema ins off after starting the vehicle .
(D Tips
To prevent the 12 volt batte ry from discharg
i ng , never leave the vehicle parked in t he d rive
r eady mode . Remove the key from the igni
tion or press the
I S TAR T ENGINE STOP ! but
ton* . When leaving the ve hicle always take
the key with you.
The power meter shows the hybrid drive condition and the availability of the hybrid system.
Fi g. 11 0 Power meter overv iew
An economica l driv ing and recuperation range is
shown in g reen. A driving range that is not eco
nom ical is shown in o range. In addition , the bat
tery status provides informat ion a bout the h igh
voltage battery charge stat us.
98
@ Fuel efficient dr iv ing within the
combust io n eng ine's pa rtial load
r an ge
@ System lim its for electr ic driving in
the EV mode
@ El ectr ic dr iving o r driving with the
combustio n eng ine ( EFFICIENCY)
Page 101 of 300

© Vehicle drive ready (READY)
® H igh voltage battery charge status
@ Recupe ration (CHARG E)
(J) Driving within the combustion en
g ine's full load range
@ 100% combust ion engine
® Boosting - the elect ric engine as
sists the combustion engine (BOOST)
@ E ngaging the conve ntiona l brakes
with recuperat ion
@ Vehicle not drive ready (OFF)
@ EV mode act ive
The need le remains at
OFF whe n the ignition is
turned on. When the veh icle enters drive ready
mode, the status message
hybrid ready appears
briefly in the instrument cluster d isplay and the
needle in the powe r meter poi nts to
READY .
Indicator lights and messages
Applies to vehicles: with hybrid drive
The indica to r li gh ts in the inst rument cluste r
b link or tur n on. They indicate functions or mal
f u nctions .
W ith some ind icator lights, messages may ap
pear and a warning tone may sou nd . A lso note
the ind icator lights in
<=:> page 2 7.
Press brake pedal to start vehicle
This message appears if you do not press the
b rake pedal whe n starting the vehicle.
Shift to N or P to start vehicle
This message appea rs if the selecto r leve r fo r the
automatic transm iss ion is not in the Nor P posi
tions whe n starting the vehicle .
-Hybrid drive: System fault! Power
brakes , steering malfunction pos sible
If the indicator lig ht turns on and th is message
appears, there is a malfunction in the hybrid sys
tem. The brake booster and the power steeri ng
~ may stop working . Stop the vehicle in a safe loca -
co g:; tion as soon as possible.
Hybrid
You may con tinue dr iving i f the indicator light
tu rns off after sta rt ing the ve hicl e several times .
Drive to an authorized repa ir facility immed iate ly
to have the malfunction cor rected .
f#iifj:j;jj,j Hybrid drive: System fault! Contact
dealer
If the indicator light turns on and this message
appea rs, there is a ma lfunction in the hybrid sys
tem. Drive to an autho rized repair fac ility imme
diately to have the malfunct io n corrected.
(II Hybrid system : Performance rest ricted .
Please contact dealer
If the indicator light turns on and this message
appears, there is an eng ine control malfunction .
The
[Ia i ndica to r li ght in the ins trument clus te r
also t urns on. The engine ou tput is red uced .
Dr ive to your authori zed A udi dealer or qualified
r ep air fa cility i mme diate ly to h ave the m alfu n c
t io n corre cte d.
Hybrid drive deactivated. Please restart
engine manually.
T h is m ess age appe ars if t he high vo lt a ge b attery
c h arge leve l h as fallen below a cer tain range or i f
t h e ig nition key is no longer i nsid e the veh icle for
vehicles with the convenience key* .
Start the engi ne w it h eithe r th e ig nitio n key
<=:> page 84 o r wi th the !START ENGI NE STOPI
button* <=:> page 87.
Hybrid battery: Low battery charge. Battery
will be charged while driving.
T h is mess age app ea rs if the high vo lt a ge b att ery
c h arge leve l has fallen be low a certa in range . If
t hi s message turns off afte r a litt le while, the
high voltage battery cha rged enoug h while driv
ing .
If the message does not turn off, have an au thor
ized repair facility cor rect the ma lf u nction as
soon as possib le .
EV mode is currently unavailable.
Th is me ssa ge appears if the con ditions
<=:> page 10 0 for enhanced ele ctric drivi ng ar e not
met. Try aga in at a late r time .
99
Page 102 of 300

Hybrid
Hybrid functions and operating modes
Applies to veh icles: w ith hyb rid drive
Fig. 111 Center console: a• butto n
"'To turn on EV mode, press the 1.,,.,, 1 button. The
indicator light in the button will turn on. The
• indicator light also turns on in the instru
ment cluster disp lay.
The functions and operating modes described be low are selected automat ically by the vehicle con
trol system, depending on the vehicle operating
status. This ensu res that the vehicle is always in
the correct operating mode. One exception is the
enhanced elect ric driving mode
(EV mode), wh ich
is activated by the driver ¢
page 100.
Driving with the combustion engine
The vehicle is powered by the combustion eng ine.
The high voltage battery is charged simultane
ously, if needed .
Full acceleration (boost)
In full acceleration, the vehicle is powered by both the combustion eng ine and the electric mo
tor . This operating mode is called
Boost and is
only available for a short amount of time because
it uses so much energy. Ava ilability depends on
the high voltage battery charge level.
The boost operating mode is act ivated by press
ing the accelerator pedal all the way down.
Electric driving
The vehicle can be driven completely electrically
depending on the high voltage battery charge
level and the driving resistance. The combust io n
engine tu rns off at that time.
100
The combustion engine starts when accelerating
or when the high voltage battery charge level
drops below a certain threshold. The vehicle re
sumes electric driving once the acceleration and
the high voltage battery charge leve l permit .
Enhanced electric driving mode (EV mode)
Pressing the
i"*'I button ¢ fig. 111 can extend the
usual limits on e lectric driving so that you can a l
ways dr ive in electric mode, if the condition of
the electrical system permits. The operating mode is then set to maximum electr ic drive @,
@ ¢page 98, fig. 110. It can be driven com
pletely electrically for up to 1.8 miles (3 km) at a
constant
37 mph (60 km/h).
The following conditions must be met to activate
the enhanced electric drive:
- The high voltage battery must be sufficiently
charged.
- Th e temperature of the
12 volt batteries and
the high voltage battery must be sufficient.
- The vehicle speed must not be higher than
62 mph (100 km/h).
- The transmission must not be in tiptronic
mode .
- Offroad mode and hi ll descent assist must not
be turned on
r::!> page 191.
The combustion engine turns on and interrupts
the enhanced elect ric drive mode when the vehi
cle is acce lerated. The gray indicator light
II al
so turns on in the disp lay. The enhanced electric
drive mode resumes automatically once acce lera
tion stops.
The enhanced electric drive mode is deactivated
if at least one of the following conditions is met:
- Th e ig nition is turned off.
- T he
l~ ·I button is pressed again .
- The high voltage battery charge level is low .
- The vehicle speed is higher than approximately
62 mph (100 km/h).
- The
S selector lever position or tiptronic mode
is selected.
- Offroad mode or hill descent assist is switched
on.
The
i oa!• I button must be pressed to reactivate it. ..,.
Page 103 of 300

,....,
N
co
er::
co
,....,
Start-Stop function
The combustion engine is operated on ly as need
ed . Gene rally, the combustion engine turns off
when the vehicle is stationary and the high vo lt
age battery powers the electrical vehicle sys
tems.
The purpose of automatica lly shutting the com
bustion engine off in hybrid drive mode is to save
fuel. All of the important vehicle systems, such
as steering, brakes and the A/C system, continue
to rema in active. In some cases, systems may re
qu ire the combustion eng ine to continue running
when the vehicle is stationary . When dr iving in
congested traffic for long periods of t ime, the
combustion engine will cycle on when the veh icle
is stat iona ry to keep the h igh voltage battery
charged.
Gliding
If the gas pedal is not pressed and the D posit ion
is selected, the combustion engine remains
turned off up to speeds of app roximately 99 mph
(160 km/h) . D riving conservat ively like th is can
reduce fuel c:on5umption .
Energy recovery (recuperation )
When braking, the electric motor will act as a
generator creating electr ic energy that is then
sto red in the high voltage battery. This also oc
curs when the ve hicle is coasting or dr iving down
hill. The combustion engine is automatica lly
turned off in this case.
Tips for Driving Efficiently with your Hybrid
A ppl ies to vehicles: with hybr id drive
Driving situa- Conditions
tions
- Shift into the D position .
Starting from a -
Release the brake pedal.
Hybrid
The vehicle is braked with the electric motor by
applying early and even pressure to the brakes
and using short pedal movements~
page 98,
fig. 110 @. By doing this, a large amount of the
kinetic energy is recovered and may be stored as
electric energy in the high voltage battery. Dur
i ng heavy brak ing, the conventional brakes are al
so act ivated
~ page 98, fig . 11 0@ .
The energy recovery is shown in the MMI d isplay
~ page 104 .
Automatic start of the combustion engine
Various operating conditions cause the combus
t ion eng ine to start automatically:
- The high vo ltage battery charge level is low.
- The temperatu re of the combustion engine is
low.
- The temperature of the catalytic converter is
low.
- The power output needed for the A/C system is
high.
- The vehicle speed is high .
- The vehicle acceleration is high .
- The incline is steep .
- High charge level for the high voltage battery
when coasting. In this case, the high voltage battery cannot absorb any more energy and so
the electric motor cannot slow down the veh i
cle . The combust ion engine turns on (engine
brake). In th is situation the high voltage bat
tery will show a Max charge.
Vehicle behavior
In the D posit ion, the hybrid system adapts
to the dr iving situat ion by automatically
stop -
Only press moderately on the ac- switch
ing between the combust ion engine
and e lectr ic dr ive types or by combining
celerator pedal.
them.
101
Page 104 of 300

Hybrid
Driving situa- Conditions Vehicle behavior
tions
- Cautious driving and reserved ac- The kinetic energy of the vehicle is used to
celeration. move the vehicle.
Constant driving - Release the accelerator pedal early When you release the accelerator pedal en-
and coasting
and entirely. tirely, the combust ion engine turns off auto-
(gliding)
matically and is disengaged. The vehicle
g lides without being propelled.
- Brake early and evenly with short The electric motor brakes the vehicle . By do-
Energy recovery pedal movements. ing this, a large amount of the kinetic energy
(recuperation) is recovered and may be stored in the high
voltage battery in the form of electr ic energy .
- Reserved acce leration and early The kinetic energy of the vehicle is used to
and even braking w ith short pedal move the vehicle .
movements.
Driving in city
- Use the
l~I button sparingly. The battery drains quickly when the 1~ 1 but -
traffic ton is turned on, which can increase fuel con-
sumpt ion because electric driv ing is given
priority, even if driv ing with the combustion
engine on would be mo re efficient.
- Intentionally take your foot off of When you release the accelerator pedal en-
the gas pedal to allow for lengthy ti rely, the combustion engine turns off auto-
coast ing . matically and is disengaged. The vehicle
glides w ithout being propelled .
Driving on high- - Reduce
the vehicle speed by re- Fuel consumption can be reduced by coast-
ways and ex- leasing
the acce lerato r peda l and ing.
pressways not
by braking.
- Avoid vehicle speeds above ap -
It is possible to coast up to a vehicle speed of
proximately 99 mph (160 km/h). approximately 99 mph (160 km/h).
- Use the S selector lever posit ion A sporty driving style increases fuel con-
and tiptronic mode sparingly . sumption .
- Do not run the combustion engine
The temperature of the combustion engine
while the vehicle is parked to warm rises very s
low ly and the fuel consumption in-
the engine . creases considerably.
- Use the rear window/exterior
mir-This conserves the energy in the high voltage
Driving in cold ror defroster and the seat
heating battery so that it is available to run the vehi-
sparingly . cle in electric mode .
weather
-Park the vehicle in a garage over- This reduces exposure of the high voltage
night. battery to cold temperatures. The required
temperature range for the high voltage bat-
tery will then be reached more quickly after
you start driving.
102