battery MERCEDES-BENZ S-Class 2015 W222 Workshop Manual

Hybrid system overview
:
12 V battery
; Transmission with electric motor
= Electric heater
? High-voltage electrical system cables
A High-voltage battery
B Recuperative Brake System
C Electric refrigerant compressor
D Vehicle socket
E Charger
F Voltage transformer
G Power electronics
You can deactivate the hybrid system manually. For further information on the high-voltage
switch-off device, see (Y page 47).278
PLUG-IN HYBRID operationDriving and parking

Instrument cluster
:
Recuperative Brake System warning lamp (Y page 366)
; Electric motor performance display (Y page 279)
= Condition of charge display for high-voltage battery (Y page 281)
? Driving mode display (Y page 280)
A Electrical range Displays and operation
Electric motor performance display The power display for the electric motor is
located on the right-hand side of the instru-
ment cluster.
The current condition of charge of the high-
voltage battery is shown as a percentage in
condition of charge display A. 100% corre-
sponds to the highest possible condition of
charge of the high-voltage battery. There are two further areas located to the left
and right of condition of charge display A:
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 lower limit ;. With increasing pres-
sure on the accelerator pedal the display
fills up from ;to:.
Driving with the electric motor: when the
display reaches upper limit :, the com-
bustion engine is switched on. If the display is approaching upper limit :and you
remove your foot from the accelerator
pedal, the display empties again. The com- bustion engine is not switched on. At low
speeds, you can thereby control the elec-
tric operation usage so that you only drive
in electric mode.
Driving with the combustion engine: the
electric motor supports the combustion PLUG-IN HYBRID operation
279Driving and parking Z

engine by providing additional torque
(boost mode) until the display reaches
upper limit
:.
You can also select the operating mode of
the hybrid system (Y page 280).
R Area =to? (CHARGE):
This shows the recuperated energy which is stored in the high-voltage battery as elec-
trical energy.
When the display reaches lower limit ?,
the maximum recuperative braking power
has been exhausted. The mechanical brake is activated.
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 279).
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 the operating mode. changing the operating mode. or
Exit
Exit manual
manual drive
driveprogram
program M
Mbefore
before
changing the operating mode.
changing the operating mode.
appears in the multifunction display. Fur-
ther information on "Display messages"
(Y page 340). :
Operating mode selected
; Operating mode unavailable
= Operating mode available HYBRID R
Electric mode or driving
with the internal com-
bustion engine is possi-
ble
R Automatic selection of
drive mode with electric
mode as often as possi-
ble
R The high-voltage battery
is discharged to approx-imately 20%.
R To subsequently main-
tain the condition of
charge of the high-volt-
age battery, the electric
output is reduced. All
vehicle functions such
as electric mode,
energy recuperation or
boost mode, for exam-
ple, are still available. E-MODE R
Electric-only drive
R Electrical power output
allotted using the haptic
accelerator pedal
(Y page 286)
R Internal combustion
engine activation using
the haptic accelerator
pedal 280
PLUG-IN HYBRID operationDriving and parking

E-SAVE R
Electric mode or driving
with the internal com-
bustion engine is possi-
ble
R Automatic selection of
drive mode with electric
mode as often as possi-
ble
R The current condition of
charge of the high-volt-
age battery is main-
tained so the electrical
energy can be used at a
later time. CHARGE R
Electric drive is not pos-
sible
R Charging the high-volt-
age battery while driv-
ing using the combus-
tion engine In automatic drive program
S(Y page 285)
and in manual drive program M(Y page 286),
only HYBRID operating mode is available.
If you switch from automatic drive program S
to automatic drive program Eor E+ ,HYBRID
operating 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
Operating the on-board computer You can display the current operating condi-
tion of the hybrid system in the multifunction
display and the COMAND display
(Y page 281).
In the COMAND display, you can also call up a graphic display of the fuel consumption and
generated electricity (Y page 285). Menus and submenus
Selecting displays in the COMAND dis-
play X
Press button Øon the controller.
The vehicle menu is displayed.
X To select Energy EnergyFlow
Flow: turn and press the
controller.
The energy flow is displayed.
X To select Consumption Consumption: turn and press the
controller.
Fuel consumption and the generated elec-
tric energy 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 Trip Tripmenu.
X Confirm by pressing aon the steering
wheel.
X Use : or9 to select Energy Flow
Energy Flow .
The active hybrid components are highligh-
ted in the energy flow display.
Energy flow display Overview
:
Internal combustion engine
; Electric motor
= High-voltage battery condition of charge PLUG-IN HYBRID operation
281Driving and parking Z

?
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 color depending on
the operating state.
Automatic engine switch-off The engine and electric motor are switched
off.
The arrows for the energy flow are not shown.
The condition of charge of the high-voltage
battery is shown when the SmartKey is in
position 2in the ignition lock.
Engine running while vehicle is stationary 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 vehicle is stationary
The engine powers the electric motor. The
electric motor operates as a generator. The
high-voltage battery is being charged.
The arrow representing energy flow is shown
in white.
Driving using the engine The engine powers the vehicle.
The arrows for the energy flow are shown in
white.
Driving using the engine plus boost mode282
PLUG-IN HYBRID operationDriving and parking

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 engine plus energy
recovery The engine powers the vehicle. The electric
motor is operating as a generator, e.g. in
overrun mode and when braking
(Y page 289). The kinetic energy of the vehi-
cle is converted into electrical energy. The
high-voltage battery is being charged.
The arrows for the energy flow are shown in
green.
Driving using the internal combustion
engine and charging the high-voltage bat-
tery The engine powers the vehicle. The engine
also powers the electric motor. The electric
motor operates as a generator. The high-volt-
age battery is being charged. The arrows for the energy flow are shown in
white.
Driving using the internal combustion
engine and discharging the high-voltage
battery The engine powers the vehicle. If the vehicle
is approaching a downhill gradient with a high
potential for energy recuperation, the condi-
tion of charge of the high-voltage battery is
intentionally kept low or intentionally
reduced.
The arrows for the energy flow are shown in
white.
Further information about map-based energy
management (Y page 289).
Electric operation mode The electric motor powers the vehicle. The
high-voltage battery supplies energy to the
electric motor.
The arrows for the energy flow are shown in
green. PLUG-IN HYBRID operation
283Driving and parking Z

Electric operation mode and charging the
high-voltage battery The electric motor is operating as a genera-
tor, e.g. in overrun mode and when braking.
The kinetic energy of the vehicle is converted into electrical energy. The high-voltage bat-
tery is being charged.
The arrows for the energy flow are shown in
green.
Charging the high-voltage battery when
stationary The engine and electric motor are switched
off.
The arrows for the energy flow are not shown.
Further information on charging the high-volt-
age battery via:
R a mains socket (Y page 212)
R a charging station (Y page 216)
R a wallbox (Y page 215) Displaying the total range and electrical
range The approximate range is based on the cur-
rent driving style.
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 Trip
Trip menu.
X Confirm by pressing aon the steering
wheel.
X Press :or9 to select the approxi-
mate total range and electrical range. 284
PLUG-IN HYBRID operationDriving and parking

Additional point of resistance in the hap-
tic accelerator pedal
The maximum available electric performance is indicated by a tangible point of resistance
in the haptic accelerator pedal.
The additional point of resistance is available
in E-MODE operating mode (Y page 280)
If you depress the haptic accelerator pedal
beyond the pressure point, the combustion
engine is switched on.
Double pulses in the haptic accelerator
pedal
A tangible double pulse in the haptic acceler- ator pedal gives you a recommendation to
release the accelerator pedal. By this means, in HYBRID, E-MODEorE-SAVE operating
mode the combustion engine can be switched
off and disconnected from the power train
(overrun mode).
The double pulse is available in drive program
E+ (Ypage 285).
After the accelerator pedal has been
released, the coasting characteristics of the
vehicle are adapted to the traffic conditions.
To avoid getting too close to the vehicle in
front, you must apply the brakes manually
when necessary.
Driving tips General driving tips
Drive carefully and maintain a safe distance
from the vehicle in front. Avoid frequent and
sudden acceleration as well as abrupt brak-
ing.
During partial electric driving, pulling away
and acceleration, the electric motor supports
the internal combustion engine.
During overrun in transmission position Dand
braking, the electric motor will operate as a
generator.
Further information on the ECO start/stop
function (Y page 288).
Additional driving tips (Y page 224).Stationary vehicle
If the vehicle is stopped, the combustion
engine is, for the most part, switched off.
Automatic climate control continues to func-
tion. The electromechanically assisted steer-
ing gear allows you to use the power steering
without reduced comfort.
Acceleration
Depending on the operating mode, pulling
away and driving under low load conditions
are performed:
R entirely by electric propulsion
R in combination with the internal combus-
tion engine
When accelerating at an increased or full
load, boost mode is utilized. The electric
motor supports the internal combustion
engine by providing additional torque when
the accelerator is depressed rapidly.
Overrun mode or braking
There are three possible operating modes
when the hybrid vehicle is decelerating:
R energy recovery takes place even when the
vehicle is decelerating purely in overrun
mode (Y page 276). The electric motor
operates as a generator and stores the
recovered energy in the high-voltage bat-
tery.
R when the brakes are applied lightly, the
vehicle is slowed down further by the elec-
tric motor. This increases the energy recov- ery taking place (Y page 276). The electric
motor operates as a generator and stores
the recovered energy in the high-voltage
battery.
R when the brakes are applied with greater
force, the service brakes are also used to
slow the vehicle down. The two systems
work together.
Urban driving
Energy is recuperated during frequent decel-
eration and stopping in city traffic. PLUG-IN HYBRID operation
287Driving and parking Z

The vehicle can be driven by the electric
motor alone up to a speed of approximately
130 km/h.
The vehicle is driven by the electric motor
alone only when all conditions for the auto-
matic engine switch-off are fulfilled.
Further information on the automatic engine
switch-off (Y page 288).
Driving on inter-urban roads
The following phases are possible when driv-
ing on inter-urban roads: R rapid acceleration (boost mode)
R constant energy consumption
R energy recuperation
R electric operation mode
A great deal of recovered energy may be
available, depending on the route profile. This reduces consumption and emissions.
Highway driving
During highway driving, fuel consumption andemissions are favorably influenced in partic-
ular by reduced power losses.
The internal combustion engine will be
switched off automatically, if:
R the driver removes his foot from the accel-
erator pedal in drive program Eand a speed
of 130 km/h is not exceeded
R the driver removes his foot from the accel-
erator pedal in drive program E+and a
speed of 180 km/h is not exceeded.
Further information on the automatic engine
switch-off (Y page 288).
ECO start/stop function General notes
The ECO start/stop function switches the
internal combustion engine off automatically
when the vehicle stops moving and at high
speeds (Y
page 289).
All vehicle systems remain active, e.g. the
automatic climate control. The ECO start/stop function is only available
in drive programs Eand E+. Electric-only
operation is only possible in drive programs E
and E+. Additional information for drive pro-
grams Eand E+(Ypage 285).
Automatic engine switch-off
The engine is switched off automatically,
including when:
R the driver removes his foot from the accel-
erator in drive program Eand a speed of
130 km/h is not exceeded (Y page 289)
R the driver removes his foot from the accel-
erator in drive program E+and a speed of
180 km/h is not exceeded (Y page 289)
R the engine has reached its operating tem-
perature
R the driver’s seat belt is fastened and the
driver’s door is closed
R the driver only slightly depresses the accel-
erator pedal in order to, for example, main- tain the current speed for a limited distance
R the hood is closed and engaged properly
R the high-voltage battery is charged suffi-
ciently
R there are no malfunctions in the hybrid sys-
tem
The internal combustion engine will not be
switched off automatically, if:
R the self-diagnosis function of the engine
control unit is still active
R there is a malfunction in the hybrid system
R the climate control of the vehicle requires it
R the high-voltage battery is being charged
(Y page 282)
R automatic emissions tests are running 288
PLUG-IN HYBRID operationDriving and parking

Automatic engine start
The automatically switched-off internal com-
bustion engine starts automatically in certain situations, if:
R the power demand from the driver via the
accelerator pedal is greater than the elec-
tric motor alone can provide
R the driver switches to drive program Sor M
R the condition of charge of the high-voltage
battery has reached the lower limit
R the settings of the automatic climate con-
trol require it, e.g. at external temperatures
above 30 †
Overrun mode
In overrun mode, the combustion engine is
switched off and is disconnected from the
drive train. The electric motor:
R generates low thrust, which corresponds to
the overrun mode of an active combustion
engine
R functions as a generator and produces the
necessary energy for the auxiliary consum-
ers and charges the high-voltage battery
Overrun mode is possible in the following
speed range:
R in drive program Ebelow 130 km/h
R in drive program E+below 180 km/h
In drive program E+, after the accelerator
pedal has been released the coasting char-
acteristics of the vehicle are adapted to the
traffic conditions. Further information about
the haptic accelerator pedal (Y page 286).
Map-based energy management For map-based energy management, the sys-
tem factors in information about the expec-
ted route when route guidance is active.
The information on the route is provided by
COMAND and includes the following:
R road categories
R speed limitations
R data on downhill gradients The use of electric energy is automatically
optimally distributed from the beginning to
the end of the journey, using information
about the route. The distribution is pre-emp-
tive and takes into consideration:
R the sections of the journey ahead
R the energy consumption on the whole route
The condition of charge of the high-voltage
battery is thus systematically controlled. In
addition, the control function takes into
account that:
R the fuel saving through the use of electrical
energy can vary, dependent on the route
(e.g. urban, interurban or highway)
R the use of electrical energy is held available
for electric driving, particularly for urban
routes
The vehicle thus automatically selects the
optimum driving mode for the respective sec- tion of the route.
Map-based energy management is available
under the following conditions:
R drive program E+is selected
R HYBRID driving mode is selected
R active route guidance is activated
R suitable map data is available
When map-based energy management is
engaged, the area in front of the vehicle in the
multifunction display will be green. Parking
X Apply the electric parking brake.
The red !indicator lamp in the instru-
ment cluster lights up.
X Use the DIRECT SELECT lever to shift the
automatic transmission to P.
X Switch the ignition off.
The READY indicator in the instrument clus-
ter goes out.
Further information on parking and switching off the internal combustion engine
(Y page 221). PLUG-IN HYBRID operation
289Driving and parking Z