Mercedes-Benz C-Class, Owner'S Manual

Page: 283 / 489

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 S or 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 operation
Driv
ing
and
pa
rki
ng