Mercedes-Benz C-Class Saloon 2022 Owner's Manual page 186

The system may be impaired or may not function
in the following situations:
If there is poor visibility, e.g. due to insufficient
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illumination of the road, highly variable shade
conditions, rain, snow, fog or heavy spray.
If there is glare, e.g. from oncoming traffic,
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direct sunlight or reflections.
If the windscreen is dirty in the vicinity of the
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multifunction camera.
If the multifunction camera is misted up, dam-
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aged or obscured.
If road signs are hard to detect, e.g. due to
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dirt, snow or insufficient lighting, or because
they are obscured.
If the information in the navigation system's
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digital map is incorrect or out of date.
If signs are ambiguous, e.g. road signs in road-
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works or in adjacent lanes.
If the radar sensors are dirty or obscured.
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When you drive on roads with steep uphill or
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downhill gradients.
If there are narrow vehicles in front, such as
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bicycles or motorcycles.
Recuperative brake system (plug-in hybrid)
▌Function of the recuperative brake system
Depending on the selected recuperation level, the
electric motor is operated as an alternator when
in overrun mode and during braking in order to
charge the high-voltage battery while driving. As
soon as you take your foot off the accelerator
pedal when the vehicle is in motion and in trans-
mission position h, recuperation in overrun
mode is initiated.
The higher the recuperation, the more sharply the
vehicle is braked when coasting and the more
electrical energy is fed into the high-voltage bat-
tery.
The deceleration in overrun mode may not be suf-
ficient depending on the driving conditions. Decel-
erating to a standstill is not possible. Also brake
with the service brake if necessary. Always adapt
your speed to the driving conditions and keep a
sufficient distance.
The recuperative brake system has the following
characteristics:
supports braking with electronically controlled
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brake force boosting
Driving and parking 183
converts the kinetic energy of the vehicle into
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electric energy
% If you brake hard, the mechanical brake is
also used. This means that the maximum
recuperative energy cannot be recovered. The
more you drive and brake in an anticipatory
manner, the more efficiently energy can be
recuperated.
System limits
The braking effect of the electric motor during
recuperation in overrun mode may be reduced or
may not be available at all in the following situa-
tions:
when the high-voltage battery charge level
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increases
if the high-voltage battery is not yet at a nor-
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mal operating temperature
In these cases, the desired deceleration is set by
the brake control system.