2014 MERCEDES-BENZ C-CLASS SALOON engine

?
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:
R Green: energy recuperation
R White: normal energy consumption
R Red: increased energy consumption, provi-
ded by the vehicle's high-voltage electrical
system
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 combustion engine is shown in dark grey.
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.274
Hybrid operationDriving and parking

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 279). The kinetic energy of
the vehicle is converted into electrical 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 electric motor The electric motor powers the vehicle. The
high-voltage battery supplies the electric
motor with electrical energy.
The arrows for the energy flow are shown in
green. Hybrid operation
275Driving and parking Z

Driving using the electric motor and
charging the high-voltage battery The electric motor is being operated as an
alternator, e.g. in overrun mode and when
braking. The kinetic energy of the vehicle is
converted into electrical energy. The high-
voltage battery is charging.
The arrows for the energy flow are shown in
green. The combustion engine is shown in
dark grey.
Displaying the total 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. Displaying fuel consumption and gen-
erated electrical energy
:
Fuel consumption
; Electrical energy generated
Every bar of the graph displays the average
value for one minute.
Fuel consumption indicator :may differ
from the indicator in the From start
From start trip
computer in the Trip Tripmenu.
To reset values: the values are reset along
with the From start
From start trip computer
(Y page 299).
X To select Consumption
Consumption: turn and press the
controller.
The Audio 20/COMAND Online display
shows fuel consumption :and electrical
energy generated ;for the last
15 minutes driven. Starting the engine
READY indicator X
Switch the ignition on.
X Depress the brake pedal. 276
Hybrid operationDriving and pa
rking

X
Observe the notes on starting the engine
(Y page 183).
X Turn the key to position 3in the ignition
lock (Y page 183) or press the Start/Stop
button once (Y page 184).
The vehicle is operational when READY indi-
cator :lights up.
Noiseless start The vehicle starts in electric mode without the
internal combustion engine. The internal
combustion engine starts only after the
power demanded by the driver exceeds the
available power that the electric motor can
currently provide.
Noiseless start operation is dependent on the
outside temperature and the operating tem-
perature of the internal combustion engine.
The vehicle is operational when READY indi-
cator :lights up. Pulling away
X Depress the brake pedal and keep it
depressed.
X Shift the transmission to position Dor R.
X Release the brake pedal.
Further information on pulling away
(Y page 184). Driving
AGILITY SELECT switch Driving programs
Use the AGILITY SELECT switch to change the
drive program. Depending on the drive pro-
gram selected, the following vehicle charac-
teristics will change:
R the drive (engine and transmission man-
agement)
R the suspension
R the steering R
the availability of the ECO start/stop func-
tion (Y page 279)
R the climate control settings
- THERMATIC (Y page 153)
- THERMOTRONIC (Y page 156)
R the rear window heating operation period
(Y page 164)
R the performance of the seat heating
(Y page 123)
If the ignition is switched off for less than four
hours, the previously selected drive program
is activated when the engine is next started. If the ignition is switched off for more than four
hours, drive program Cis activated when the
engine is next started. X
Push AGILITY SELECT switch :up or down
until the desired drive program is selected. The selected drive program appears in the
multifunction display. After five seconds
the display goes out and the status icon of
the selected drive program appears.
In addition, the current drive program set-
tings are displayed in the Audio 20/
COMAND Online display.
Available drive programs: I
Individual Individual settings
S+
Sport Plus R
Extremely sporty driving
style with boost mode
R Electric-only drive is not
possible
R The ECO start/stop
function is not available Hybrid operation
277Driving and parking Z

S
Sport R
Sporty driving style with
boost mode
R Electric-only drive is not
possible
R The ECO start/stop
function is not available C
Comfort R
Comfortable, economi-
cal driving style
R Electric-only drive is
possible
R The ECO start/stop
function is available E
Eco R
Particularly economical
driving style
R Electric operation mode
is used as often as pos-
sible
R The ECO start/stop
function is available Additional information for drive programs
(Y page 197).
Using the steering wheel gearshift paddles,
you can temporarily change gear yourself.
Further information on the manual drive pro-
gram (Y page 278).
Manual gearshifting
Using the steering wheel gearshift paddles,
you can temporarily change gear yourself.
The transmission must be in position D. Elec-
tric-only operation is not possible when man-
ually changing gear.
Activating when driving with the electric
motor:
X Pull the left-hand steering wheel gearshift
paddle (Y page 198).
The combustion engine is switched on.
Manual gearshifting is activated tempora-
rily. The selected gear and Mappear in the
multifunction display.
Pulling on the right-hand steering wheel
gearshift paddle when manual gear chang- ing is not active switches to overrun mode
(Y page 280).
Activating when driving with the combustion
engine:
X Pull the left-hand steering wheel gearshift
paddle (Y page 198).
Manual gearshifting is activated tempora-
rily. The selected gear and Mappear in the
multifunction display.
The ECO start/stop function is not available
when manually changing gear.
Further information on the manual drive pro-
gram (Y page 198).
Driving tips General driving tips
Drive carefully and maintain a suitable dis-
tance from the vehicle in front. Avoid frequent
and sudden acceleration as well as abrupt
braking.
During partially electric driving, pulling away
and acceleration, the electric motor supports the internal combustion engine.
During overrun in transmission position Dand
braking, the electric motor operates as an
alternator.
To reduce fuel consumption, use:
R recuperative braking (Y page 269)
R overrun mode (Y page 280) or extended
overrun mode (Y page 280)
For further information on the ECO start/stop
function; see (Y page 279).
Additional driving tips (Y page 211).
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 electro-mechanically assisted steer-
ing gear allows use of the power steering
without loss of comfort. 278
Hybrid operationDriving and parking

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 utilised. 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 When coasting and decelerating, energy
recuperation is already taking place
(Y page 269). The electric motor functions
as an alternator and stores the recuperated
energy in the high-voltage battery.
R When braking gently, the electric motor
increases the deceleration of the vehicle.
Energy recuperation is increased
(Y page 269). The electric motor functions
as an alternator and stores the recuperated energy in the high-voltage battery.
R During heavy braking, the service brake is
also used to slow down the vehicle. Both
systems work together.
Driving in the city
Energy is recuperated during frequent decel-
eration and stopping in city traffic.
The vehicle can be driven by the electric
motor alone up to a speed of approximately
35 km/h, e.g.:
R while approaching a traffic light
R in stop-and-start traffic
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 280). Driving on inter-urban roads
Three phases are possible when driving on
inter-urban roads:
R rapid acceleration (boost mode)
R constant energy consumption
R energy recuperation
Depending on the characteristics of the
route, there may be a lot of recuperated
energy available. This reduces consumption
and emissions.
Driving on the motorway
When driving on a motorway, the following
have a particularly positive effect on fuel con- sumption and emissions:
R the decrease in wasted power when using
recuperative braking
R the decrease in wasted power in overrun
mode when the combustion engine is
switched off
Manoeuvring and turning
The hybrid drive makes it possible to manoeu- vre and turn solely using the electric motor.
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 280).
All vehicle systems remain active, e.g. the
automatic climate control.
The ECO start/stop function is only available in drive programs C,Eand I. Electric-only
operation is only possible in drive programs C
and E. Hybrid operation
279Driving and parking Z

Automatic engine switch-off
The internal combustion engine is switched
off automatically if:
R the driver removes his foot from the accel-
erator pedal and a speed of 160 km/h is
not exceeded (Y page 280)
R the combustion engine and the transmis-
sion have reached operating temperature
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 bonnet is closed and engaged properly
R the high-voltage battery is charged suffi-
ciently
R there are no faults in the hybrid system
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 the climate control of the vehicle requires it
R the high-voltage battery is being charged
(Y page 274)
R automatic emissions tests are running
R the operating temperature of the engine,
transmission and catalytic converter has
not yet been reached
Automatic engine start
The internal combustion engine, which has
been automatically switched-off, starts auto-
matically in certain situations, when:
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 S
+
R the driver has activated manual gearshift-
ing R
the charge level 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
This operating mode is available in the speed
range below 160 km/h.
The combustion engine is switched off and is disconnected from the drive train.
The electric motor:
R simulates an overrun torque which is equiv-
alent to the overrun torque of the combus-
tion engine
R functions as a generator and produces the
necessary energy for the auxiliary consum- ers and charges the high-voltage battery
Extended overrun mode
Overrun mode allows you to increase the
vehicle range.
When the vehicle is in overrun operating
mode:
X Pull the right-hand steering wheel gearshift
paddle.
Energy recuperation is reduced to the min-
imal amount of energy required. The vehi-
cle rolls faster and further, e.g. on long and steep downhill gradients or while coasting
towards a set of traffic lights.
You can see the reduction in energy recuper-
ation in the electric motor CHARGE display
(Y page 272).
The "extended overrun" operating mode is
deactivated again if:
R the combustion engine starts
R you depress the brake pedal 280
Hybrid operationDriving and pa
rking

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 208). Hybrid operation
281Driving and parking Z