Mercedes-Benz C-Class Saloon 2022 Owner's Manual page 172

If the high-voltage battery for the electric drive
R
system is not sufficiently charged or the vehi-
cle conditions for a silent start are not met,
the vehicle will start with the combustion
engine.
%
Depending on the system, it may happen that
even though the high-voltage battery is
charged, electric mode has restricted or no
availability. Once the combustion engine has
been operated for long enough and ambient
conditions permit, electric mode is again
available without restriction.
Characteristics with moderate power output
requests:
The combustion engine is switched off as
R
often as possible during the journey.
The vehicle can, depending on the drive pro-
R
gram selected and the state of charge of the
high-voltage battery, be accelerated electri-
cally up to a speed of approximately
140 km/h.
Characteristics with high power output requests:
The electric motor supports the combustion
R
engine (boost effect), e.g. when you pull away
or accelerate.
The high-voltage battery is discharging.
R
Characteristics when the accelerator pedal is
released during the journey:
The electric motor will be operated as an alter-
R
nator when in overrun mode and during brak-
ing.
The high-voltage battery is charging.
R
Notes on electric mode:
Vehicles with hybrid systems generate signifi-
R
cantly less noise when stationary and when
being driven than vehicles with combustion
engines.
When you are driving in electric mode, the
R
vehicle may not be heard by other road users
due to the significantly lower noise generated.
For this reason, the vehicle is equipped with a
sound generator, which serves as an acoustic
Driving and parking 169
vehicle alerting system (AVAS). This safety
device is prescribed by law.
The external noise of the sound generator is
perceptible in the vehicle interior at low
speeds and does not represent a malfunction.
If not all of the vehicle conditions for electric
R
mode are met, then the combustion engine is
switched on.
Performance restrictions in electric mode are
R
possible as a result of the operating tempera-
ture of the high-voltage battery and drive sys-
tem, the ambient temperature and aging of
the high-voltage battery.
In electric mode, the maximum power is not
R
permanently available and may drop to contin-
uous output.
%
Vehicles with diesel particulate filters: during
the regeneration of the diesel particulate fil-
ter, the drive programs are not available or are
restricted and the charge level of the high-
voltage battery may change.