Page 289 of 497

are shown in green. Active Lane Keeping
Assist is ready for use.
X To deactivate: press button;.
Indicator lamp :goes out. Active Lane
Keeping Assist is deactivated. The Lane
Lane
Keeping
Keeping Assist
Assistoff
offmessage appears in
the multifunction display.
Selecting Standard or Adaptive setting
X In the Assistance
Assistance menu on the on-board
computer, select the Active Lane Keep‐
Active Lane Keep‐
ing Assist
ing Assist function (Ypage 329).
X Select Standard
Standard orAdaptive
Adaptive.
When Standard
Standard is selected, no warning
vibration occurs if:
R you have switched on the turn signals. In
this event, the warnings are suppressed
for a certain period of time.
R a driving safety system intervenes, such
as ABS, BAS or ESP ®
.
When Adaptive
Adaptive is selected, no warning
vibration occurs if:
R you have switched on the turn signals. In
this event, the warnings are suppressed
for a certain period of time.
R a driving safety system intervenes, such
as ABS, BAS or ESP ®
.
R you accelerate hard, e.g. kickdown.
R you brake hard.
R you steer actively, e.g. swerve to avoid an
obstacle or change lane quickly.
R you cut the corner on a sharp bend.
In order that you are warned only when nec-
essary and in good time if you cross the lane marking, the system detects certain condi-
tions and warns you accordingly.
The warning vibration occurs earlier if:
R you approach the outer lane marking on a
bend
R the road has very wide lanes, e.g. a motor-
way
R the system detects solid lane markings The warning vibration occurs later if:
R the road has narrow lanes
R you cut the corner on a bend
Towing a trailer
If you couple up a trailer, make sure that you have correctly established the electrical con- nection. This can be accomplished by check-
ing the trailer lighting. PLUG
‑IN HYBRID operation Points to remember
General notes Hybrid technology combines a fuel efficient
internal combustion engine with a powerful
electric motor. In HYBRIDmode, the hybrid
drive system automatically selects the most
efficient operating mode for every driving sit-
uation. Drive the vehicle in the usual manner.
To save fuel in HYBRIDmode, the hybrid drive
system switches off the combustion engine
as often as possible during the journey when power output requirements are low. When
power output requirements are low, the elec-
tric motor powers the vehicle. When power
output requirements are high, the combus-
tion engine is automatically switched on.
When the vehicle is stationary, the combus-
tion engine is usually switched off. Conse-
quently, there is usually no engine idling as
with combustion engine vehicles.
For pulling away and accelerating, the electric
motor supports the internal combustion
engine using the power stored in the high-
voltage battery. In addition, the power is used
for partially electric driving, operation of the
electric coolant compressor and to support
the 12 V on-board electrical system. In this
way the hybrid drive helps to reduce your
vehicle's fuel consumption.
Observe the driving tips on plug-in hybrid
operation (Y page 297).286
PLUG‑
IN HYBRID operationDriving and parking
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Recuperative Brake System
If you release the accelerator pedal when the
vehicle is in motion, overrun recuperation is
initiated. The electric motor is operated as a
alternator when in overrun mode and when
you brake. Hybrid technology converts the
kinetic energy of the vehicle into electricity
and stores it in the high-voltage battery.
Observe the important safety notes for the
Recuperative Brake System (Y page 46).Important safety notes
If the engine is switched off by the ECO start/
stop function and you open the driver's door:
R a message appears in the multifunction dis-
play and
R a warning tone sounds
For further information, see (Y page 357).
All of the vehicle's systems remain active, if:
R the vehicle is stationary
R the combustion engine is switched off
R the READY-indicator in the instrument clus-
ter is lit
If you remove your foot from the brake pedal
while in transmission position D or R, the
vehicle could pull away automatically.
Observe the notes on the READY display of
the ECO start/stop function (Y page 298).
Vehicles with an electric motor generate sig-
nificantly less noise than vehicles with inter-
nal combustion engines. As a result, your
vehicle may not be heard by other road users
in certain situations. This is the case, for
example, when you are parking and your vehi-
cle is not seen by other road users.
This requires you to adopt a particularly antic-
ipatory driving style, as it is necessary to allow for the possibility that other road users may
behave unpredictably. PLUG‑IN HYBRID operation
287Driving and parking Z
Page 291 of 497
Hybrid system overview
:
Charger
; Voltage transformer
= Transmission with electric motor
? Electric heater
A High-voltage battery
B Power electronics
C High-voltage electrical system cables
D Recuperative Brake System
E 12 V battery
F Vehicle socket
You can switch off the hybrid drive system manually. Further information on the high-voltage disconnect device (Y page 44).288
PLUG‑IN HYBRID operationDriving and parking
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Instrument cluster
:
Electric range
; Driving mode display (Y page 290)
= Recuperative Brake System warning lamp (Y page 377)
? Electric motor power display (Y page 289)Displays and operation
Electric motor power display The electric motor power display is on the
right-hand side of the instrument cluster.
R Area :to; (E-DRIVE):
This shows the electric output from the
electric motor, e.g. during electric opera-
tion or in boost mode.
When the motor is switched on, the display
is at limit :. With increasing pressure on the accelerator pedal the display fills up
from
:to;.
Driving with the electric motor: when the
display reaches limit ;, the combustion
engine is switched on. If the display is
approaching limit ;and you remove your
foot from the accelerator pedal, the display
empties again. The combustion engine is
not switched on. At low speeds, you can
thereby control the electric operation
usage so that you only drive in electric
mode.
Driving with the combustion engine: the
electric motor supports the combustion
engine by providing additional torque
(boost mode) until the display reaches
limit ;.
You can also select the operating mode of
the hybrid drive system (Y page 290).
R Area =to? (CHARGE):
This shows the recuperated energy which is stored in the high-voltage battery as elec-
trical energy. PLUG
‑IN HYBRID operation
289Driving and parking Z
Page 293 of 497

When the display reaches limit
?, the max-
imum recuperative braking power has been exhausted. The mechanical brakes are acti-
vated.
Selecting the operating mode Button
:allows you to choose between dif-
ferent operating modes.
X Press button :to change the operating
mode.
The operating mode selected appears in
the instrument cluster (Y page 289).
If it is not possible to change operating
modes, the display message Change
Change the the
current drive program before
current drive program before
changing changing the
theoperating
operating mode
modeorExit
Exit
manual drive program M before
manual drive program M before
changing the operating mode changing the operating mode appears
in the multifunction display. Further infor-
mation on "Display messages"
(Y page 357). :
Operating mode selected
; Operating mode unavailable
= Operating mode available HYBRID R
Electric operation mode
or driving with the inter- nal combustion engine
is possible
R Automatic selection of
drive mode with electric
operation mode as
often as possible
R The high-voltage battery
is discharged to approx-imately 20%
R To subsequently main-
tain the charge status of
the high-voltage bat-
tery, the electric output
is reduced. All vehicle
functions such as elec-
tric operation mode,
energy recuperation or
boost mode, for exam-
ple, are still available. E-MODE R
Electric-only operation
mode
R Electrical power output
allotted using the haptic
accelerator pedal
(Y page 297)
R Internal combustion
engine activation using
the haptic accelerator
pedal 290
PLUG‑IN HYBRID operationDriving and parking
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E-SAVE R
Electric operation mode
or driving with the inter- nal combustion engine
is possible
R Automatic selection of
drive mode with electric
operation mode as
often as possible
R The current charge sta-
tus of the high-voltage
battery is maintained so the electrical energy
can be used at a later
time CHARGE R
Electric operation mode
is not possible
R Charging the high-volt-
age battery while driv-
ing using the combus-
tion engine In automatic drive program
S(Y page 295)
and during manual gearshifting (Y page 296),
only HYBRID operating mode is available.
If you switch from automatic drive program S
to automatic drive program E,HYBRID oper-
ating mode continues to be selected.
If manual drive program Mis deactivated, the
automatic transmission shifts:
R into the automatic drive program that was
last selected
R into the driving mode that was last selected
Each time the engine is started, HYBRID
mode is automatically selected.
Operating the on-board computer You can display the current operating condi-
tion of the hybrid drive system in the multi-
function display and the Audio 20 or
COMAND Online display (Y page 291).
In the Audio 20 or COMAND Online display,
you can also call up a graphic display of the
fuel consumption and generated electricity
(Y page 295). Menus and submenus
Selecting messages in the Audio 20 or
COMAND Online display X
Press the Øbutton on the controller.
The vehicle menu appears.
X To select Energy Energyflow
flow: turn and press the
controller.
The energy flow is displayed.
or
X To select Consumption Consumption: turn and press the
controller.
Fuel consumption and the electric energy
generated are displayed.
X To exit the display: press the %button
on the controller.
Selecting the energy flow display in the multifunction display X
Use Ñ on the steering wheel to call up
the list of menus.
X Press the :or9 button on the steer-
ing wheel to select the Travel Travelmenu.
X Confirm by pressing aon the steering
wheel.
X Select Energy flow
Energy flow with: or9 .
The active hybrid components are highligh- ted in the energy flow display.
Energy flow display Overview
:
Internal combustion engine
; Electric motor PLUG‑
IN HYBRID operation
291Driving and parking Z
Page 295 of 497

=
Charge status of the high-voltage battery
? High-voltage battery
A Energy flow
The active hybrid components are highligh-
ted.
The energy flow is indicated by arrows. The
arrows have a different colour depending on
the operating state.
Automatic engine switch-off The internal combustion engine and the elec-
tric motor are switched off.
The arrows for the energy flow are not shown.
The charge status of the high-voltage battery
is shown when the key is in position 2in the
ignition lock.
Engine running while the vehicle is sta-
tionary The combustion engine is running while the
vehicle is stationary. The high-voltage battery
is not being charged.
The arrows for the energy flow are not shown. The combustion engine is highlighted. Charging while the vehicle is stationary
The internal combustion engine drives the
electric motor. The electric motor is operating
as an alternator. The high-voltage battery is
charging.
The arrow representing energy flow is shown in white.
Driving using the internal combustion
engine The internal combustion engine powers the
vehicle.
The arrows for the energy flow are shown in
white. 292
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‑IN HYBRID operationDriving and pa rking
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Driving using the internal combustion
engine and boost mode If you rapidly depress the accelerator, the
electric motor supports the internal combus-
tion engine by providing additional torque.
The arrows for the energy flow are shown in
red.
Driving using the internal combustion
engine and energy recuperation The internal combustion engine powers the
vehicle. The electric motor is being operated
as an alternator, e.g. in overrun mode and
when braking (Y page 299). The kinetic
energy of the vehicle is converted into elec-
trical energy. The high-voltage battery is
charging.
The arrows for the energy flow are shown in
green. Driving using the internal combustion
engine and charging the high-voltage bat-
tery The internal combustion engine powers the
vehicle. The internal combustion engine also
drives the electric motor. The electric motor
is operating as an alternator. The high-voltage battery is charging.
The arrows for the energy flow are shown in
white.
Driving using the internal combustion
engine and discharging the high-voltage
battery The internal combustion engine powers the
vehicle. If the vehicle is approaching a down-
hill gradient with a high potential for energy
recuperation, the charge status of the high-
voltage battery is intentionally kept low or
intentionally reduced.
The arrows for the energy flow are shown in
white.
Further information on route-based energy
management (Y page 299). PLUG
‑IN HYBRID operation
293Driving and parking Z