Hybrid drive system
General notes
Hybrid technology combines a fuel efficient
internal combustion engine with a powerful
electric motor.
Important safety notes
Danger of electric shock
GDANGER
The vehicle's high-voltage electrical system is under high voltage. If you modify components
in the vehicle's high-voltage electrical system
or touch damaged components, you may be
electrocuted. The components in the vehi-
cle's high-voltage electrical system may be
damaged in an accident, although the damage
is not visible. There is a risk of fatal injury.
Following an accident, do not touch any high-
voltage components and never modify the
vehicle's high-voltage electrical system. Have
the vehicle towed away after an accident and
the vehicle's high-voltage electrical system
checked by a qualified specialist workshop.
When towing a vehicle after an accident, be sure
to observe the following sections in the vehicle
Operator's Manual:
RTransporting the vehicle
RTowing the vehicle with the rear axle raised
RTowing a vehicle with both axles on the
ground
Read the safety instructions on towing and tow-
starting (
Ypage 53).
All components of the hybrid drive system are
marked with yellow warning stickers that warn
you of the danger of high voltage. The cables of
the vehicle's high-voltage electrical system are
orange in color.
The ignition must be switched off when carrying
out general tasks, such as changing bulbs or
checking the coolant level.
Automatic switching off of the hybrid
drive system
If components of the restraint system are acti-
vated during an accident, the hybrid drive sys-
tem is automatically deactivated.
The hybrid drive system is not activated when
the vehicle is started if:
Ran electrical short circuit is detected in the
hybrid drive system
Ran electrical connection in the hybrid drive
system is disconnected
This ensures that you do not come into contact
with high voltage.
Manual switching off of the hybrid drive
system
The hybrid drive system can be deactivated
manually using the high voltage switch-off
device.
!To prevent damage to the hybrid drive sys-
tem please observe the following instruc-
tions:
Ronly deactivate the hybrid drive system
manually in the following situations.
Rwork on the hybrid drive system may only
be carried out at a qualified specialist work-
shop, even when it has been deactivated
manually.
Deactivate the hybrid system manually if:
Rthe 6 restraint system warning lamp in the
instrument cluster lights up after an accident
Rthe vehicle is badly damaged, e.g. after an
accident, and the restraint system compo-
nents were not activated
Rthe vehicle is badly damaged and has to be
towed or transported
10Hybrid drive system
Safety
Occupant safety
Restraint system warning lamp
If the restraint system is disrupted, the high-
voltage on-board electrical system may not be
switched off in the event of an accident as inten-
ded.
GDANGER
If the restraint system is malfunctioning,
restraint system components may be trig-
gered unintentionally or may not deploy as
intended during an accident. This can affect
for example the Emergency Tensioning
Device or the air bag. Furthermore, in the
event of an accident, the vehicle's high-volt-
age electrical system may not be deactivated as intended. You may be electrocuted if you
touch the damaged components of the vehi-
cle's high-voltage electrical system. This
poses an increased risk of injury or even fatal
injury.
Have the restraint system checked and
repaired in a qualified specialist workshop assoon as possible. After an accident, switch off
the ignition immediately and remove the key
from the ignition lock.
A malfunction has occurred if the 6restraint
system warning lamp:
Rdoes not light up after the ignition is switched
on
Rdoes not go out after a few seconds while the
combustion engine or hybrid system is run-
ning
Rlights up again while the combustion engine
or hybrid system is running
12Occupant safety
Safety
In the vehicle Operator's Manual, information and recommendations can be found on:
Rusing automatic climate control
Rusing the rear control panel
Rthe individual functions
Observe these notes for optimal use of the automatic climate control.
The "Cooling with air dehumidification" function is even available when the engine is not running
(
Ypage 17).
Use the residual heat function if you want to heat or ventilate the vehicle interior when the ignition is switched off. The residual heat function can only be activated or deactivated with the ignition
switched off. When the ignition is switched on, the residual heat function is switched off
(
Ypage 17).
Operating the climate control sys-
tems
Switching cooling with air dehumidi-
fication on/off
If you deactivate the "Cooling with air-dehumid-ification" function, the air inside the vehicle will
not be cooled. The air inside the vehicle will also
not be dehumidified. The windows can fog up
more quickly. Therefore, deactivate the cooling
with air-dehumidification function only briefly.
The "Cooling with air dehumidification" function
is available even when the engine is not running.
The air inside the vehicle is cooled and dehu-
midified according to the temperature selected.
Condensation may drip from the underside of
the vehicle when it is in cooling mode. This is
normal and not a sign that there is a malfunc-
tion.
XTo activate: press the¿orÁ button.
The indicator lamp in the ¿orÁ button
lights up.
XTo deactivate: press the¿orÁ but-
ton.
The indicator lamp in the ¿orÁ button
goes out. The "Cooling with air dehumidifica-
tion" function has a delayed switch-off fea-
ture.
Switching the residual heat on or off
It is possible to make use of the residual heat of
the engine to continue heating the stationary
vehicle for up to 30 minutesafter the engine has
been switched off. The heating time depends on
the set interior temperature.
XTo activate: press theÌorÁ button.
The indicator lamp in the ÌorÁ button
lights up.
XTo deactivate: press theÌorÁ but-
ton.
The indicator lamp in the ÌorÁ button
goes out.
The blower will run at a low speed regardless of
the airflow setting.
If you activate the residual heat function at high
temperatures, only the ventilation will be acti-
vated. The blower runs at medium speed.
Residual heat is deactivated automatically:
Rafter approximately 30 minutes
Rwhen the ignition is switched on
Rif the battery voltage drops
Pre-entry climate control via Smart-
Key
General notes
Before getting in, the vehicle interior can be
briefly warmed or ventilated in advance and the air from the air vents can be pre-cooled.
The high-voltage battery must be sufficiently
charged before "Pre-entry climate control via
SmartKey" can be activated.
When the vehicle is pre-cooled, the following
functions are activated if required:
RClimate control system
RBlower
RSeat ventilation
Operating the climate control systems17
Climate control
The running time of the "Pre-entry climate con-
trol at departure time" function may be reduced
if:
Rthe vehicle is not connected to an electric
power supply and
Rthe high-voltage battery is not fully charged
With active "Pre-entry climate control at depar-
ture time" the condition of charge of the high-
voltage battery can be reduced, even if the
charge cable connector is connected.
When the vehicle is cooled, the following func-
tions are activated if required:
RClimate control system
RBlower
RSeat ventilation
When the vehicle is heated, the following func-
tions are activated if required:
RClimate control system
RBlower
RSeat heating
If you have activated ionization via the multime- dia system, it is activated together with "Pre-
entry climate control".
Information on activating or deactivating "Pre-
entry climate control at departure time" using
the multimedia system (see the vehicle Opera-
tor's Manual).
Setting the departure time
You can set the departure time using the on-
board computer or via the online access to the
vehicle. The activation of the "Pre-entry climate
control at departure time" function can be linked
to this departure time. Your vehicle will then be
cooled or heated until the desired temperature
is reached in time for the set departure time.
"Pre-entry climate control at departure time" will
be activated a maximum of 55 minutes before
departure. If the departure is delayed, the vehi-
cle will be heated or cooled for another five
minutes.
XTo set the departure time: set the departure
time using the on-board computer
(
Ypage 44). Set the departure time using
the Mercedes connect me web App http://
www.mercedes.me.
XTo activate or deactivate "Pre-entry cli-
mate control at departure time": activate
or deactivate "Pre-entry climate control at
departure time" using the on-board com- puter. Activate or deactivate "Pre-entry cli-
mate control at departure time" using the
Mercedes connect me web App http://
www.mercedes.me.
The "Pre-entry climate control at departure
time" function switches off automatically when
the vehicle is started. The following functions
remain active:
RSeat heating
RSeat ventilation
RIonization
To deactivate "Pre-entry climate control at
departure time": the activated "Pre-entry cli-
mate control at departure time" can be deacti-
vated using the &button (
Ypage 19).
Activating/deactivating the "Immedi-
ate pre-entry climate control" function
using the button
You can activate "Immediate pre-entry climate
control" even if the vehicle interior is already at
the desired temperature. This means, for exam-
ple, that the vehicle interior continues to be
cooled or heated if the journey is interrupted for
up to 50 minutes and the interior temperature is
kept constant.
XTo activate or deactivate "Immediate pre-
entry climate control": press button:.
The blue or red indicator lamp in the button
lights up or goes out.
The colors of the indicator lamps on button :
have the following meanings:
Rblue: cooling activated
Rred: heating activated
Ryellow: departure time is preselected
Operating the climate control systems19
Climate control
Z
Driving
Points to remember
General notes
Hybrid technolog ycombine s afuelefficien t
internal combustion engin ewit h a powerful
electric motor. In HYBRIDmode, thehybrid
drive syste mautomatically selects th emost effi-
cien toperatin gmode fo revery drivin gsituation .
Drive th evehicle in th eusual manner.
To sav efue lin HYBRID mode, thehybrid drive
syste mswitches of fth ecombustion engin eas
ofte nas possible durin gth ejourney when powe r
output requirements are low. Whe npowe rout -
put requirements are low, th eelectric moto r
powers th evehicle. The engin eis switched on ,
eve nwhil eth evehicle is in motion ,when a
higher powe routput is required. The engin eis
usually switched of fwhen th evehicle is station -
ary. Consequently, there is usually no engin e
idlin gas wit hcombustion engin evehicles .
Fo rpulling away and accelerating, th eelectric
moto rsupports th einternal combustion engin e
usin gth epowe rstored in th ehigh-voltage bat -
tery. In addition ,th epowe ris used fo relectric
driving, operation of th eelectric refrigerant
compressor and to supply th e12 Von-boar d
electrical system. In this way th ehybrid drive
s
yste mhelps to reduce your vehicle' sfue lcon-
sumption .
Observ eth edrivin gtips on plug-i nhybrid oper-
ation (
Ypage 26).
Recuperative Brak eSyste m
If you release th eaccelerator peda lwhen th e
vehicle is in motion ,overrun recuperation is ini-
tiated. The electric moto ris operated as agen -
erato rwhen in overrun mode and when you
brake .Hybrid technolog yconvert sth ekineti c
energ yof th evehicle into electricit yand stores
it in th ehigh-voltage battery.
Observ eth eimportant safet ynote sfo rth e
Recuperative Brak eSyste m (
Ypage 11) .
Important safet ynotes
If th eengin eis switched of fby th eEC Ostart /
stop function ,you ope nth edriver's doo rand
unfasten your seat belt :
Ramessag eappears in th emultifunction dis -
play and
Ra warnin gtone sounds
Further information (
Ypage 45).
Al lof th evehicle' ssystems remain active ,if:
Rth evehicle is stationary
Rth ecombustion engin eis switched of fand
Rth eREADY indicator in th einstrumen tcluster
lights up
If you remov eyour foot from th ebrake peda l
whil ein transmissio nposition Dor R, th evehicle
may pull away automatically.
Observ eth enote son th eREADY display of th e
EC Ostart/sto pfunction (
Ypage 23).
Vehicles wit han electric moto rgenerate muc h
les sdrivin gnoise than vehicles wit hinternal
combustion engines. As aresult ,your vehicle
may no tbe hear dby other road user sin certain
situations.
Dependin gon th evehicle' sequipmen tand
country-specific regulations, th evehicle can be
equipped wit hAcoustic Vehicle Indication .
Acoustic Vehicle Indication generate s acertain
soun dat aspeed between 0and 20 mph
(30 km/h). Thi shelps other road users, par tic-
u
larly pedestrian sand cyclists, to hear your
vehicle better. The soun dcan also be hear d
insid eth evehicle.
The volume depend son th eengin espeed. The
faste ryou accelerate, th elouder th esoun dis. At
a speed of over 20 mph (30 km/h)the sound is
switched off. Above this speed, the natural
sounds from the vehicle are sufficient that it can
be heard in good time by other road users.
20Driving
Dr iving an d parking
If manual gearshifting is deactivated, the auto-
matic transmission shifts:
Rinto the drive program that was last selected,
and
Rinto the driving mode that was last selected
If you change the drive program, the operating
mode that was last selected is stored for approx-
imately 60 seconds. After this time, the HYBRID
operating mode is automatically activated.
Starting the engine
The vehicle starts in electric mode without the
internal combustion engine (noiseless start).
The internal combustion engine starts only after the power demanded by the driver exceeds the
available power that the electric motor can cur-
rently provide.
Noiseless start operation is dependent on the
outside temperature and the operating temper- ature of the internal combustion engine. If not all
conditions for noiseless start operation are ful-
filled, the vehicle starts with the internal com-
bustion engine.
Observe the notes on starting in the vehicle
Operator's Manual.
XSwitch on the ignition.
XDepress the brake pedal.
XStart the vehicle (see the vehicle Operator's
Manual).
When the vehicle is operational, the READY
indicator lights up in the multifunction display
(
Ypage 39).
Pulling away
XDepress the brake pedal and keep it
depressed.
XShift the transmission to position Dor R.
XIf the Apply Brake to Shift from 'P'display message appears in the multifunction display, depress the brake pedal more firmly
and select the desired transmission position.
XRelease the brake pedal.
XCarefully depress the accelerator pedal.
You can find further information on pulling away
in the vehicle Operator's Manual.
Drive programs
DYNAMIC SELECT controller
Select the drive program using the DYNAMIC
SELECT controller. Depending on the drive pro-
gram selected the following vehicle character-
istics will change:
Rthe drive (engine and transmission manage-
ment)
Rthe suspension
Rthe steering.
Rthe energy management
Each time you start the engine with the ignition SmartKey or the Start/Stop button, the Com-
fort drive program is activated. You can find
further information on starting the engine in the
vehicle Operator's Manual.
XTurn DYNAMIC SELECT controller :as many
times as necessary until the desired drive
program is selected.
The status icon of the selected drive program
is shown in the multifunction display.
In addition, the current drive program settings are displayed briefly in the multimedia system
display.
22Driving
Driving and parking
Available drive programs:
IndividualRIndividual settings
SportRSportydriv ing style with
increased boost mode
RElectric-only operation is
not possible
ComfortRComfortable, economical
driv ing style
RElectric-only operation is
possible
SlipperyROptimal driving charac-
teristics on slippery or
snow-covered roads
RElectric-only operation is
possible
Further information on the drive program (see
the veh icleOperator's Manual).
Using the steering wheel paddleshifters, you
can temporar ilychange gears yourself. For fur-
ther information on the manual drive program
(
Ypage 23).
Manual gear shifting
Using the steering wheel paddleshifters, you
can temporar ilychange gears yourself. The
transmission must be inposition D. When you
activate manual gearshifting, the combustion
engine isautomatically switched on.
XTo activate: pullthe left or right steering
wheel paddle shifter.
Manual gearshifting isactivated temporar ily.
The selected gear and Mappear inthe mult i-
function display.
The ECO start /stop function isnot availab le
when manually changing gear.
Further information on manual gearshifting (see
the veh icleOperator's Manual).
ECO start/stop function
General notes
The ECO start/stop function switches the com-
bustion engine off automatically when the veh i-
cle stops moving and at speeds below 80 mph
(13 0km/ h)(
Ypage 24). All vehicle systems remain active, e.g. the auto-
matic climate control.
The ECO start/stop function is neither available
in the
Sport drive program nor during manual
shifting.
Automatic engine switch-off
The engine is switched off automatically, includ-
ing when:
Rthe driver removes his/her foot from the
accelerator in the Comfortdrive program and
a speed of 80 mph (130 km/h) is not excee-
ded (
Ypage 24)
Rthe engine has reached its operating temper- ature
Rthe driver’s seat belt is fastened and the
driver’s door is closed
Rthe driver only slightly depresses the accel-
erator pedal in order to, for example, maintain
the current speed for a limited distance
Rthe hood is closed and engaged properly
Rthe high-voltage battery is charged suffi-
ciently
Rno malfunctions are present in the hybrid
drive system
The internal combustion engine will not be
switched off automatically, if:
Rthe self-diagnosis function of the engine man-
agement is active
Rthere is a malfunction in the hybrid drive sys-
tem
Rthe climate control of the vehicle requires it
Rthe high-voltage battery is charging
(Ypage 40).
Automatic engine start
The automatically switched-off internal combus-
tion engine starts automatically in certain situa-
tions, if:
Rthe power demand from the driver via the
accelerator pedal is greater than the electric
motor alone can provide
Rthe driver switches to the Sportdrive pro-
gram or to manual gearshifting
Rthe condition of charge of the high-voltage
battery has reached the lower limit
Rthe driver has selected the CHARGE operating
mode
Driving23
Driving and parking
Problems with HYBRID operation
Internal combustion engine
ProblemPossible causes/consequences and MSolutions
You cannot start the
internal combustion
engine. The multifunc-
tion display shows no
display messages. The
READY indicator in the
multifunction display is
off.For example, self-diagnosis is not yet complete or the hybrid drive
system is malfunctioning.
XSwitch off the ignition and turn it back on.
XTry to start the internal combustion engine again.
If the internal combustion engine still does not start:
XConsult a qualified specialist workshop.
You wish to pull away,
but the ECO start/stop
function does not start
the internal combustion
engine. The READY indi-
cator in the multifunc-
tion display is off.The ECO start/stop function has failed. The warning and indicator
lamps in the instrument cluster light up.
XShift the transmission to P.
XSwitch off the ignition and turn it back on.
XStart the engine.
The hybrid drive system is malfunctioning.
XConsult a qualified specialist workshop.
Recuperative Brake System
ProblemPossible causes/consequences and MSolutions
Braking resistance is
reduced and brake pedal
travel is longer than
usual.GRisk of accident
The Recuperative Brake System is malfunctioning.
XObserve the additional display messages in the multifunction dis-
play (Ypage 45).
XObserve the information regarding indicator and warning lamps in
the instrument cluster (Ypage 49) .
Driving25
Driving and parking
Z