Mercedes-Benz C-Class Operator's Manual page 234

PLUG‑IN HYBRID operation
232
Automatic engine start
The automatically switched-off internal combus-
tion engine starts automatically in certain situa-
tions, if:
the power demand from the driver via the
R
accelerator pedal is greater than the electric
motor alone can provide
the driver switches to drive program S or M
R
the condition of charge of the high-voltage
R
battery has reached the lower limit
the settings of the automatic climate control
R
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:
generates low thrust, which corresponds to
R
the overrun mode of an active combustion
engine
functions as a generator and produces the
R
necessary energy for the auxiliary consumers
and charges the high-voltage battery
Overrun mode is available in drive program E
below 160 km/h.
In drive program E, after the accelerator pedal
has been released the coasting characteristics
of the vehicle are adapted to the traffic condi-
tions. Further information about the haptic
accelerator pedal (
Route-based energy management
For route-based energy management, the sys-
tem factors in information about the expected
route when route guidance is active.
The information on the route is provided by the
multimedia system and includes the following:
road categories
R
speed limitations
R
data on downhill gradients
R
The use of electric energy is automatically opti-
mally distributed from the beginning to the end
of the journey, using information about the
route. The distribution is pre-emptive and takes
into consideration:
the sections of the journey ahead
R
the energy consumption on the whole route
R
page 230).
Y
The condition of charge of the high-voltage bat-
tery is thus systematically controlled. In addi-
tion, the control function takes into account
that:
the fuel savings through the use of electrical
R
energy can vary, depending on the route (e.g.
urban, interurban or highway)
the use of electrical energy is held available in
R
particular for electric operation (e.g. urban
routes)
The vehicle thus automatically selects the opti-
mum driving mode for the respective section of
the route.
Route-based energy management is available
under the following conditions:
drive program E is selected
R
HYBRID driving mode is selected
R
active route guidance is activated
R
suitable map data is available
R
When route-based energy management is in
operation, the area in front of the vehicle is
shown as green in the multifunction display.
Parking
Apply the electric parking brake.
X
The red ! indicator lamp in the instrument
cluster lights up.
Use the DIRECT SELECT lever to shift the
X
automatic transmission to P.
Switch the ignition off.
X
The READY indicator in the instrument cluster
goes out.
Further information on parking and switching off
the internal combustion engine ( page 177).
Y