Press brake pedal to release parking brake
This driver message appears when the switch
to release the parking brake was pressed. The
parking brake can only be released if yo u step
on the brake pedal and at the same time press
the switch or you automatically re lease the
parking brake with the starting assist
<=>page 89.
fpii Parking brake malfunction!
This driver message appears together with
the yellow
rm symbol when there is a parking
brake malfunction.
Start-Stop-System
Descript ion
A ppl ies to vehicles: with Sta rt-Stop-System
The Start-Stop -System can help increase fuel
economy and reduce CO
2 emissions.
In the Start-Stop-mode, the eng ine shuts off
automatically when the vehicle is stopped,
such as at a traffic light. The ignition remains
sw itched on during this stop phase. The en
gine will be automatically restarted when
needed.
The last Start-Stop-System setting (o n/off us
ing the button
lr.;, .. I) will be restored when the
ignition is turned on. The LED in the
1r.;, .. 1 but
ton turns on when the Start-Stop-System is
switched off manually.
Basic requirements for the Start-Stop
mode
- The driver's door is closed .
- The driver's seat belt is latched.
- The hood is closed.
- The vehicle must have been driven faster
than 2.5 mph (4 km/h) since the last stop .
- A tra iler is not hitched to the veh icle .
A WARNING
- Never turn off the engine before the ve
hicle has come to a complete stop. The
full function of the brake booster and the
power steering is not guaranteed. You
On the road 91
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 ser ious injuries.
- To reduce the risk of injuries, make sure
that the Start-Stop-System is turned off
when working in the engine compart
ment
c:> page 93.
(D Note
Always switch off the Start-Stop-System
when driving through water
c:> page 93.
Starting /stopping the engine
App lies to vehicles: wit h Start -Stop -System
Fig. 101 Instrum ent cluster: Engine switched off (stop
phase)
.,. Slow the veh icle to a stop using the brake
and keep pressing the brake pedal. The en
gine will switch off. The
ti] indicator light
appears in the instrument cluster disp lay
and - also appears in the trip com
puter .
.,. When you take your foot off the brake ped
al, the engine restarts . The indicator light
turns off.
Additional information
T he engine will switch off in the P, D/S and N
positions as well as in ma nual mode. In the P
position, the engine will also remain off if you
take your foot off the brake pedal. The engine
starts again when you select another selector lever position and take your foot off the brake
pedal.
If you se lect the R position during a Stop
phase, the engine will start again .
92 On the road
Shift from D/S to P quickly to prevent the en
gin e from starting unintentionally when shift
ing through R.
You can dete rm ine fo r yoursel f if the eng ine
will stop or not by reducing o r increasing the
amo unt of force you use to press th e brake
pedal. For example, if you only lightly press
on the brake pedal in stop-and and -go traffic
o r when turning , the engine will not switch off
when the vehicle is stationary . As soon as you
press the brake down harder , the eng ine will
switch off.
(D Tips
- Press the brake pedal during a stop
phase to keep the vehicle from rolling .
- The ign ition will turn off if you press the
I S TART ENGINE STOP I* button dur ing a
stop phase .
- The image in the display is slightly differ
ent in some mode ls .
General information
App lies to vehicles: with Start -Stop -System
The standard S tar t-S top-mode can be cancel
led for different system -related reasons .
Fig. 1 02 Ins trument clust er: E ngin e-S top tempo rari ly
una va ilabl e
Engine w ill not switch off
Before each stop phase, the system checks if
ce rt a in cond itions have been met. For exam
ple, the engine w ill
not be sw itched off in the
following situations:
- The engine has not reached the min imum
required temperatu re for Start -Stop-mode. - The interior temperat
ure se lected by the A/C
system has not bee n reached.
- The outside tempe rature is extremely high/
low .
- The winds hield is being defroste d
o::::>pageBl.
-The parking sys tem* is switched on .
- The battery charge level is too low.
- The steering wheel is sharply turned or
there is a steer ing movement .
- After engaging the reverse gear .
- On sharp incl ine s.
er .
Eng ine automat ically r estarts
T he stop phase is interrupted in the follow ing
situations, fo r example . The engine restarts
without any action by the driver.
- The interior temperat ure varies from the
temperature se lected in the A/C system .
- The winds hield is bee ing defrosted
o::::> page 81.
- The b rake pedal is pressed severa l times in a
row.
- The battery charge level becomes too low .
- High power consumpt ion.
er .
Switching the ign ition off automatically
To p revent the battery from draining, the ign i
t ion w ill switch off
automatic ally when all of
the following conditions have been met :
- The vehicle has already been d riven .
- The engine has been turned off by the Sta rt-
Stop -System .
- The d river 's doo r is opened .
- The d river 's seat belt is removed .
- The brake pedal is not pressed down .
- The vehicle is stationary.
In this case, the activated low beam will be re-
placed by the side marker lights. The s ide ..,.
marker lights will switch off after approxi
mately 30 minutes or when you lock the vehi
cle.
If the Start-Stop-System has not turned off
the engine or if you have switched the Start
Stop-System off manually, the ignition will
not be automatically switched off and the en
g ine will continue to run
i::> &. .
A WARNING
Never allow the engine to run in confined
spaces -danger of asphyxiation .
@ Tips
If you shift into the D/S or N positions af
ter shift ing into reverse, the vehicle must
be driven faster than 6 mph (10 km/h) in
order for the engine to switch off again .
Switching the Start-Stop-System on/off
manually
Applies to vehicles: with Start-Stop-System
If you do not wish to use the system, you can
switch it off manually.
Fig. 103 Ce nter con sole : Star t-Stop-Sy stem butto n
.. To switch the Start -Stop-System on/off
manua lly, press the
1/A) "'I button. The LED in
the button turns on when the system is
switched off.
In vehicles witho ut the MMI *, the
1/A) "'I b utton
is found underneath the se lector lever.
(D Tips
If you switch the system off during a stop
phase, the engine will start again auto
matically.
On the road 93
Messages in the instrument cluster
display
Appl ies to vehicles: with Start-Stop-System
Start-stop system: deactivated. Please
restart engine manually
This message appears when specific condi
tions are not met during a stop phase and the
Start-Stop-System will
not be able to restart
the engine. The engine mus t be started with
the key or with the
I START ENGIN E STOP !*
button .
Start-stop system: system fault. Function
unavailable
There is a malfunction in the Start -Stop -Sys
tem . Drive the vehicle to an author ized repair
facility for servicing as soon as possible to cor
rect the malfunction .
Transmission: Car may roll! Shift to park!
This message appears if the selector lever is
not in the P position when the driver 's door is
opened . You will also hear a warning tone.
Sh ift the selector lever to the P position. Oth
erwise, the vehicle could roll.
Speed warning system
Overview
The speed warning system helps you to keep
your driving speed below a set speed limit.
T he speed warning system warns if the driver
exceeds a previous ly stored maximum speed.
A warning tone will sound as soon as the vehi
cle speed exceeds the set speed by about
3 mph (3 km/h) . At the same time, a warning
symbol appears in the display . The symbol 's
appearance might be different in some mod
els .
The speed warning system has
two warning
thresholds
tha t function independen tly of
each other and that have somewhat different
purposes :
Speed warning 1
You can use speed warning 1 to set the m axi
mum speed while you are driving . This setting ..,.
(30 km/h to 240 km/h). Settings can each be
adjusted in intervals of
5 mph (10 km/h) .
Cruise control
Switching on
The cruise control sys tem makes it possible to
drive at a constant speed starting at 20 mph
(30 km/h) .
0
f
®t
0
Fig. 10S Contro l lever wi th push -bu tton
Fig. 106 Di splay: Selec ted speed
.. Pull the lever to position (D c:? fig . 105 to
switch the system on .
.. Drive at the speed to be contro lled.
.. Press button @to set that speed .
The stored speed and the ind icator light
Bll!lm (US model)/ il (Canad ian model) ap
pear in the instrument cluster disp lay
<=> fig . 106. The display may vary, depending
on the type of display in your vehicle.
The speed is kept constant by modify ing en
gine power or through an active brake inter
vention.
A WARNING
- Always pay attention to the traffic around you when the cruise control is in
operation . You are always responsible for
c:o ;:g 0 ci: c:o al
On th e road 95
your speed and the distance between
your vehicle and other vehicles.
- For reasons of safety, cruise control
should not be used in the city, in stop
and-go traffic, on twisting roads and
when road conditions are poor (such as
ice, fog, gravel, heavy rain and hydro
plan ing) - you could have an accident.
- Switch the cruise control off temporarily
when dr iv ing in turning lanes, h ighway
exits or in construction zones .
- Please note that unconsciously "resting" your foot on the accelerator pedal causes cru ise contro l not to brake. This is due to
the control system be ing overridden by
the driver's acceleration.
- Never use the cruise control when driving off-road or on unpaved roads. The c ruise
con tro l is intended for use only when the
vehicle is being operated on paved roads,
and is not suitable for use off-road or on
unpaved roads.
- If a brake system malfunction such as overheating occurs when the cruise con
trol system 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
IR;\1 )~14 (US model)/ fil (Canadian model)
1s on .
(D Tips
The brake lights illuminate as soon as the
brakes apply automatically .
Changing speed
.. To increase/decrease the speed in incre
ments, tap the lever in the
0 10 direction
<=> page 95, fig. 105 .
.. To increase/decrease the speed quickly, hold
the lever in the
0 10 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
98 Hybrid -Do not transport fluids in open contain
ers in the luggage compartment. Spilled
fluids can seep underneath the cargo
floor. This can damage the high voltage
system.
Starting the vehicle
App lies to vehicles: with hybrid drive
The vehicle is started and turned off either
with the ignition key~
page 83 or with the
I START ENGIN E STOP ! button* ~ page 86 in
the same way as a conventional vehicle .
When starting the vehicle, the needles in the instrument cluster move upward briefly .
When the vehicle enters drive ready mode,
the status message
hybrid ready appears
briefly in the instrument cluster display and
the needle in the power meter points to
READY ~ page 98.
Depending on the operation mode of the hy
brid system, there are two possible drive
ready modes after the vehicle has been start
ed:
Power meter overview
Applies to vehicles: with hybrid dr ive
Drive ready mode with combustion engine
If the operating requirements~ page 100 for
electric drive mode are
not met, the combus
tion engine starts the vehicle as usual. You can start driving as usual.
Drive ready mode with the electric motor
If the operating requirements~ page 100 for
the electric drive mode are met, the combus
tion engine remains off after starting the ve
hicle.
(0 Tips
To prevent the 12 volt battery from dis
charging, never leave the vehicle parked in
the drive ready mode. Remove the key
from the ignition or press the
I START ENGINE STOP! button* . When
leaving the vehicle always take the key
with you.
The power meter shows the hybrid drive condition and the availability of the hybrid system.
Fig. 107 Power meter overv iew
An economical driving and recuperation range
is shown in green. A driving range that is not
economical is shown in orange. In addition, the battery status
provides information about
the high voltage battery charge status.
lill-
(!) Fuel efficient driv ing within the
comb ustion engine's partia l
l oad range
@ System limits fo r electric d riving
i n the EV mode
® Elect ric driving or d riving w it h
the combustion engine (EFFI -
CI ENCY)
© Vehicle d rive ready (READY)
® H igh vo ltage bat tery c ha rge sta -
tus
® Recuperation (CHARGE)
0 Dr iving w it hi n the combus tion
engine's fu ll loa d range
® 100% combust io n engine
® Boost ing -the elect ric e ngine
assists the combus tion engine
( B OOST)
@ Engaging the conventiona l
brakes w ith recuperat ion
@ Vehicle not drive ready ( OFF)
@ EV mode active
The needle rema ins at
OFF when the igni tion
is tur ned on. W hen the veh icle en ters drive
ready mode, t he stat us message
hybrid ready
ap pears briefly in the instrument cluster dis
p lay and the needle in the power meter po ints
to
READY .
Indicator lights and messages
Applies to vehicles: with hybrid drive
The indicator lights in the instrument cluste r
b link or t urn on . Th ey i ndicate fu nctions o r
malfunct ions .
W ith some ind icator lights, messages may ap
pear and a warning tone may sound. Also note
the indicator lights in c::,;,
pag e 27.
Press brake pedal to start vehicle
This message appea rs if you do not press the
brake peda l when starting the vehicle.
Hybrid 99
Shift to N or P to start vehicle
T his mess age appears if the se lector lever for
the automatic t ransmission is not in t he N or
P positions when starting the vehicle.
- Hybrid drive: System fault! Power
brakes, steering malfunction possible
I f the indica tor ligh t turns on and this mes
sage a ppears, t here is a ma lf u nction in the hy
bri d system. The brake booster and the power
steering may stop working. Stop the vehicle i n
a safe l ocat io n as soo n as poss ible.
You may cont in ue dr iving if the indicator light
turns
off afte r start ing the ve hicle severa l
times. Dr ive to an a uthorized repa ir facility
immediately to have the malfunct ion correct
ed .
EHithjj,j Hybrid drive : Sy stem fault!
Contact dealer
If the indicator light turns on and this mes
sage appears , there is a malfunct ion in the hy
br id system . Drive to a n author ized repair fa
c ili ty immediat ely to hav e th e m alfunc tion
corrected.
Ill Hybrid system: Performance
restricted. Please contact dealer
If th e i ndica to r light turns on and this mes
sag e appea rs, there is an engine contro l ma l
f unct io n .
The @B indi cator light in t he instr u
m ent cluster also tur ns on. The engine ou tput
i s re duced. Drive to yo ur autho rize d Au di dea l
er or qualifie d repair facility immediately to
have the malfunct io n corrected .
Hybrid drive deactivated. Please restart
engine manually.
Th is message ap pears if the high vo ltage bat
te ry charge leve l has fallen below a certa in
range or if the ignition key is no longer inside
the ve hicle for ve hicles with the convenience
key *.
Start the eng ine with e it h er the ignitio n key
¢page 83 or with the !STAR T EN GINE STOPI
button* c::> page 86.
-Offroad mode and hill descent assist must
not be turned on
c::> page 198.
The combust ion eng ine tu rns on and inter
rupts
the enhanced electric d rive mode when
the vehicle is accelerated. The gray indicator
light
l:!I also turns on in the disp lay. The en
hanced electric drive mode resumes automati
cally once acceleration stops.
The enhanced e lectric drive mode is
deactivat
ed
if at least one of the following conditions is
met :
- Th e ign ition is turned off.
- Th e
1.:1"1 button is pressed again.
- The high voltage battery charge level is low .
- The veh icle speed is higher than approxi -
mately 62 mph (100 km/h).
- The
S selector lever position or tiptronic
mode is selected .
- Offroad mode or hill descent assist is
switched on .
T he
ld" I button must be pressed to reactivate
it .
Start-Stop function
The combustion engine is operated on ly as
needed. Generally, the combustion engine
turns off when the vehicle is stationary and
the high voltage battery powers the electrical
vehicle systems.
The purpose of automatica lly shutting the
combustion engine off in hybrid drive mode is
to save fuel. All of the important veh icle sys
tems, such as steering, brakes and the A/C
system, cont inue to remain active. In some
cases, systems may require the combustion
engine to cont inue running when the vehicle
is stationary. When dr iv ing in congested traf
fic for long per iods of time, the combustion
engine w ill cycle on when the vehicle is sta
tionary to keep the high voltage battery
charged.
Gliding
I f the gas pedal is not pressed and the D posi
tion is selected, the combustion engine re-
Hybrid 101
mains turned off up to speeds of approxi
mately 99 mph ( 160 km/h) . Driving conserva
tive ly like this can reduce fuel consumption .
Energy recovery (recuperation)
When braking, the elect ric motor will act as a
generator creating e lectric energy that is then
stored in the high voltage battery. This also
occurs when the ve hicle is coasting or driving
downhi ll. The combustion engine is automati
cally turned off in this case.
The vehicle is braked with the electric motor
by applying ear ly and even pressure to the
brakes and using short pedal movements
¢ page 98, fig. 107 @. By doing this, a large
amount of the kinetic energy is recovered and may be stored as electric energy in the high
voltage battery. During heavy braking, the
convent ional brakes are also act ivated
c::> page 98, fig. 107 @.
The energy recovery is shown in the MMI dis
play
c::> page 104 .
Automatic start of the combustion engine
Various operating conditions cause the com
bust ion engine to start automat ically :
- The high voltage battery charge leve l is low.
- The temperature of the comb ustion engine
is low.
- The temperature of the catalyt ic converter is
low .
- The power output needed for the A/C sys-
t em is high.
- The vehicle speed is hig h.
- The vehicle acceleration is high.
- The inclin e is steep.
- High charge level for the high voltage bat-
tery when coasting. In th is case, the h igh
voltage battery cannot absorb any mo re en
ergy and so the electric motor cannot slow
down the veh icle. The combustion engine
tu rns on (engine brake). In this situation the
h igh voltage battery will show a Ma x charge.
102 Hybrid Tips for Driving Efficiently with your Hybrid
Applies to vehicles: with hybrid drive
Driving situa-
Conditions Vehicle behavior
tions
-Shift into the D position.
In the D position, the hybrid system adapts
Starting from a -
Release the brake pedal. to the driving situation by automatically
stop -
Only press moderately on the ac- switching between the combustion engine
and electric drive types or by combining
celerator pedal.
them.
- Ca utious dr iv ing and reserved ac-
The kinetic energy of the vehicle is used to
ce leration . move the vehicle.
Constant driv-
ing and coasting -
Release the acce lerator pedal When you release the acce lerator pedal en-
early and entirely. ti rely, the combustion engine turns off au-
(gliding)
tomatically and is disengaged. The vehicle
glides without being propelled.
- Brake early and even ly with short The electric motor brakes the vehicle. By
Energy recovery pedal movements.
doing this
, a large amount of the kinetic
energy is recovered and may be stored in
( recuperation)
the high voltage battery in the form of
electric energy.
- Reserved acceleration 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
la• I button sparing ly. The battery drains quickly when the laVI
button is turned on, which can increase
traffic
fuel consumption because electric driving
is given priority, even if driving with the
combustion engine on would be more effi-
cient .
- Intentionally take your foot off When you release the acce lerator pedal en-
of the gas pedal to allow for ti rely, the combustion engine turns off au-
lengthy coasting . tomatically and is disengaged. The vehicle
glides without being propelled.
Driv ing on high- -
Reduce the vehicle speed by re-Fuel consumption can be reduced by coast-
ways and ex- l
eas ing the accelerator peda l and mg.
pressways not by braking.
- Avoid vehicle speeds above ajp -
It is possible to coast up to a veh icle speed
proximately 99 mph (160 km/h) . of approximately 99 mph (160 km/h).
- Use the S selector lever position A sporty driving style increases fuel con -
and tiptronic mode sparingly. sumption.